Updated May, 2012
INSTALLATION MANUAL For the CNG Sequential Injection System (Can be taken as reference for LPG also)
INDEX CHAPTER 1
INTRODUCTION........................................................................................................2
CHAPTER 2
GENERAL INSTALLATION OVERVIEW ...............................................................3
CHAPTER 3
WIRES .................................................................................................... ....................3
CHAPTER 4
INJECTORS RAIL.......................................................................................................9
CHAPTER 5
THE CNG REDUCER ................................................................................................11
CHAPTER 6
GAS PRESSURE SENSOR ........................................................................................12
CHAPTER 7
LEVEL SENSOR ................................................................................... ....................12
CHAPTER 8
MONITOR...................................................................................................................13
CHAPTER 9
GENERAL SET-UP .................................................................................. ..................14
CHAPTER 10
ADVANCED SET-UP .................................................................................................15
CHAPTER 11
SETUP PROGRAMMING ..........................................................................................17
CHAPTER 12
ADVANCED PROGRAMMING ................................................................................19
CHAPTER 13
SETUP LAMBDA .................................................................................................... ..20
CHAPTER 14
HOW TO MANUALLY ADJUST THE VEHICLE ....................................................22
CHAPTER 15
TROUBLE SHOOTING .............................................................................................23
CHAPTER 16
ANNEXS .....................................................................................................................29
ANNEX A
SET THE PORT COM
ANNEX B
RAIL CONNECTION FOR 6 CILINDERS
ANNEX C
RAIL 3 OHM CONNECTION AND WIRING3................................................................30
ANNEX D
FULL GROUP WIRING CONNECTION..........................................................................31
ANNEX E
HOW TO CONNECT 2 REDUCERS IN A 6&8 CYL. ENGINE......................................31
ANNEX F
CONNECTORS GENERAL INFO ....................................................................................32
ANNEX G
SWITCHING INDICATIONS AND LEVEL INDICATOR ON THE SWITCH............. .33
....................................................................................................29 ...................................................................30
HongKong LGC Gas Equipment Co., Ltd Rm 719A, Huang Jia Centre, Dong Huan Rd 1, Long Hua Area, Shenzhen518109, China Tel: +86-755-81780556 Fax: +86-755-81780337 Website: www.lgc.hk
Chapter 1
INTRODUCTION
This is an electronically controlled Gas Sequential Injection System. It can be installed in nearly any petrol fuel injection vehicles, in particular in all last-generation catalytic fuel injection vehicles. The system is a multi-point sequential injection system, 100% “follower” and where no OBD emulation device is required. It is available both for the LPG and the CNG versions. Gas is injected through the injector rail directly into the manifold near the intake valves, thus achieving an optimal fuel mixture and improving gas exhausts level. The gas injection timing is directly driven by the original petrol signal. The Gas Sequential Injection system is composed of the following items: an Electronic Control Unit Unit, a Switch, a Gas Pressure Regulator Regulator, a GAS Injector Rail Rail. micro- Switch
Picture 1 – CNG Sequential Injection System
Chapter 2
GENERAL INSTALLATION OVERVIEW
- Always disconnect the Battery when installing the Gas system.
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- Never place the 15 Amp fuse in fuse housing until the system is fully installed. - Place the ECU and all cables far from heat sources and far from high voltage sources (such as battery cables, spark plugs, coils, etc.). - Place the ECU in vertical position with connectors above. - Solder and insulate all electrical connections. - Use only gas hoses specific for CNG. - Keep all Gas hoses as short as possible. - All hoses connecting the Gas injectors to the Manifold MUST have the same length. - Check the system for GAS leakage after completing the installation.
Chapter 3
WIRES
The wiring of the Sequential Injection System, is composed of 3 wire bundles: - The GREY wiring includes all the same connections required for every type of car, i.e. 3, 4, 5, 6, 8 cylinders cars; - The BLACK wiring differs in two versions in accordance with the number of cylinders of the engine: * Black wiring 4 cylinders cylinders, to be used for vehicles until 4 cylinders; * Black wiring 6&8 cylinders cylinders, to be used for vehicles until 6&8 cylinders - Wiring for the sockets sockets. Available in three versions: * Injectors with Bosh type connectors; * Bosh * Injectors with Japan type connectors; * Injectors without connectors also known as Universal type connectors.
Should the provided connectors are not compatible with the original ones of the vehicles, it is suggested to cut the connectors and connect the wires, by welding. The wire controlling the Petrol injectors have a different color on every cylinder, therefore, it is good practice to check the polarity by using a multimeter. Once checked solder the wire ends and pay attention to the color of each wire and their related sequence. Should a mistake happen and the wrong signal be taken from the wrong wire, the following information will not be displayed in your PC, that is; “Time of injection Petrol”, “RPM number” and “Status of the Injectors”. This information is present when viewing the screen “MONITOR”. Should this occur, check all wires and repeat the above mentioned operation.
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Picture 2 – The GREY wiring
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Picture 3 – The BLACK 4 cylinders wiring
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Picture 4 – The BLACK 6 cylinders engine wiring
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Picture 5- 8 cylinders engine wiring
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Picture 6– The cylinders sockets
IMPORTANT NOTE: When performing an installation on a 6 cylinders engine, it is recommended not to connect the injector socket indicated with the number “C3”. The +12 volt is taken from C4 (our reference as the 4th cylinder) having wire color YELLOW,
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YELLOW/BLACK and BLACK.
Chapter 4 Injector Rail
3 cylinders
4 cylinders Picture 6 -Injector Rail Types
Installation instructions: The Injectors Rail should be installed as follows: connect the Rail outlets with the respective petrol injector connection, therefore follow the correct firing sequence of the engine: cable “R1” to the cylinder Nr. “1”, cable “R2” to cylinder Nr. “2”, “R3” to the cylinder Nr. “3”, cable “R4” to cylinder Nr. “4” This device should be installed in the engine compartment, away from heat sources and protected from water or humidity. The hoses connecting the injectors rail to the manifold must have the same length and will be as short as possible. In the case of installation of a 3 or a 6 cylinders engine the following is recommended: Important note: should you use a 4 way injector on a 3 or 6 cylinder engine we recommend NOT to connect the injector socket C3 and on rail R3.
Note: The first rail will be connected with the grey cables to be connected with the cable N2 and which runs
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the first group of cylinders ( N1 ); the second rail is to be connected with the cable N5 which runs the second group of cylinders (N4 / N6 ). Recommended injector rail nozzle size (unit: mm) taken into consideration the Number of cylinders and the engine power, can be viewed here bellow: CNG with 3 Ohm type
CNG with Matrix type
Cylinder N° 4
5
6
8
55
1,6
65
1,6
1,6
75
1,8
1,8
1,6
85
1,8
1,8
1,8
1,6
95
2,0
2,0
2,0
1,8
1,8
105
2,0
2,0
2,0
2,0
2,0
115
2,0
2,0
2,0
2,0
2,0
125
2,2
2,2
2,0
2,0
135
2,2
2,2
2,2
2,2
145
2,2
2,2
2,2
2,2
3
4
5
6
8
55
1,8
65
1,8
1,8
75
2,0
2,0
1,8
85
2,0
2,0
2,0
1,8
95
2,2
2,2
2,2
2,0
2,0
105
2,2
2,2
2,2
2,2
2,2
115
2,2
2,2
2,2
2,2
2,2
125
2,4
2,4
2,2
2,2
135
2,4
2,4
2,4
2,4
2,2
145
2,4
2,4
2,4
2,4
2,2
2,2
160
2,4
2,4
2,4
180
2,2
2,2
180
2,4
2,4
200
2,4
2,4
200
2,6
2,6
160
Max Power in Kw
Max Power in Kw
3
Cylinder N°
(If for LPG, the nozzle size may be 0.2 mm less.) Important: The above mentioned size chart, are the result of various data gathered in the laboratory. The nozzle size could vary in accordance to the quality of the CNG. Therefore, it is recommended to verify the good performance of the engine during calibration by road testing the car, and change nozzles or enlarge size by a drill if needed. The nozzle hole we provide is generally 1.4MM(Suit to low power car), if your car is of bigger output volume, please use bigger sized nozzles, or DRILL the current ones into bigger sizes. If the nozzle size too small, it will be very hard to set an appropriate airgas ratio during calibration air-gas ”). (“constant at high RPM RPM””, “constant at idle idle”
Chapter5 The CNG REDUCER
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Pressure setting screw
Incr. (+)
(The regulator we use now is different with the one shown above but similar, no problem to take it as reference.) - The outlet pressure of the reducer can be trimmed by acting on the screw placed on centre top of the front cover. By turning the screw clockwise the pressure is decreased and by turning counter clockwise the pressure is increased. - It is recommended that the outlet pressure of the reducer is trimmed as per the table here bellow
Engine Size
If : Map Pressure
Up to 140 Hp
30KPa
Up to 210 Hp
35KPa
Then : Reducer Pressure 80 - 90KPa 90
- 110KPa
- The reducer can be installed in any position but it is recommended that the coil of the lock off is positioned upward. None the less, the reducer must be secured by fitting on to the bracket. - It is not a good practice to connect the water circuit in series to the water flow, if set in series the water flow will be limited to the engine and may create damage. Therefore, always fit the reducer in parallel to the water flow and always bellow the radiator’s water level. - The NTC or temperature sensor is fitted to the side of the alloy block of the reducer. When screwing the sensor take care and DO NOT apply excessive torque. The only function of the sensor is to measure the temperature of the reducer. Always use the NTC provided with the given ECU and connect as per the manufacturer instruction. - In the case the reducer is placed in a “big” size engine it is recommended to use an oversize CNG lock off and a steel pipe having 8x1mm in size. - Connect the vacuum port placed on the side of the top cover of the front part of the reducer to the pressure sensor or ECU as recommended by the manufacturer or follow the indications provided in the “MAP SENSOR CONNECTION SCHEME”.
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Chapter 6 Gas Pressure Sensor The sequential injection system uses a gas pressure sensor to assure a good performance of the engine and to allow the best possible carburetion of the engines. The sensor is to be connected, using a rubber hose to the Gas injector rail, to the manifold and to the vacuum port located on the cover of our reducer. This device allows measures the following signals: - The MAP value (MAP: Manifold Absolute Pressure) - The gas pressure inside the injector Rail •
Chpter7 LEVEL SENSOR With this system it’s possible to make use of different types of level sensor, it is simple and easy to use, simple General Setup Level Sensor Type select the right sensor type from the screen “General Setup” and then selecting “Level Type”.
General Setup Set Switch Levels Go to “General Setup” screen and click on “Set Levels”, open the window with manual regulation of the levels limits. We can select two types of data input: SIMPLE SIMPLE: normally used for the LPG. Hold the multivalve in your hand with the level sensor connected correctly. Move the float to the desired level and click on the arrow next to the level you wish to set. Doing this, we’ll decide at which exact LPG level will the led light up (When red light shown on the micro-switch, it means LPG is going to use out, it’s time to refill the tank with LPG).
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ADVANCED ADVANCED: Normally used for the CNG. Select the 4 desired Voltage levels at which the exact CNG pressure will the led light up. Click on SEND to save all chosen values.
Chapter 8 MONITOR
- Connect the Interface from the PC to the ECU Mach PRO. MONITOR - Select “MONITOR MONITOR”. - See on bottom left of the screen above the switch, make sure the light shows a GREEN color and that the word CONNECTED is shown. This indicates that the PC is connected to the ECU: - Check the bottom right screen and see that all injectors are ALWAYS GREEN in color:
- MAP Pressure should indicate a value between 35KPa to 45KPa: - The temperature of the reducer should be no less than 65°C before proceeding with the trimming/
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programming: - When engine is on Petrol you can switch to Gas by clicking on the screen switch above the LGC logo:
- The GAS PRESSURE (reducer pressure indicated when idling) should be 75 to 95KPa when trimming on CNG (NGV). - Even though it is not necessary, we do advise to connect the lambda 1. The lambda is useful to visualize if the air/fuel ratio indicated a rich or lean mixture:
Chapter 9 GENERAL SET-UP
GENERAL SETUP - Select “GENERAL SETUP” - SETUP SWITCHING SWITCHING, this function is used to select the way to switch from Petrol to Gas. Normally we advise to switch in Deceleration when using manual gears and Acceleration with automatic gear box and full group MAP THRESHOLD - Select the “MAP THRESHOLD” or leave as per our suggestion (Best). THRESHOLD PRESSURE VALUE - “THRESHOLD VALUE” This value will be selected to modify the pressure value in which
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the switching will happen, (keep as per suggested by the manufacturer but change if required). Activating AUTOMATIC SWITCHING TO PETROL - “AUTOMATIC PETROL” When “Activating Activating” this function, the system will automatically switch to Petrol when the gas tank is empty. If activated select a value between 10KPa and 20KPa. Default value is 20KPa. MIN TEMPERATURE OF VAPORIZER - “MIN VAPORIZER” Keep the temperature “Switching to GAS” at 36°C in cold climates and no less than 32°C on hot climates. - AUTOMATIC SWITCHING TO PETROL PETROL, If activated the system will automatically switch the system back to Petrol in the event of low temperatures within the reducer. This phenomenon can happen during normal and when having a vapor lock in the water system or in case of low water level in the radiator. If activated select a temperature value between 6°C to 10°C. - LEVEL SENSOR TYPE TYPE. Select the level sensor type in accordance to the sensor type, or signal used. LEVELS: Click on this function in order to modify the level ranges of the level sensor. This - SET FUEL LEVELS function will allow you to set and personalized level thresholds. For more details see the installation manual or Annex B here included. - SOUND SOUND: Click on this function to activate the beeper or the talking kit (optional to be ordered separately and could be programmed with different languages)
Chapter 10 ADVANCED SET-UP
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- You can decide to return to petrol when the vehicle is working at idle and/or at high RPM. When it happen the display inside the driver's cabin will always indicate running on Gas, without any variation. - When the engine is working at idle, the vehicle could run: * TO GAS GAS: normally to GAS; PETROL: the vehicle changes over to petrol as soon as it’s under the set engine rpm; * REENTER TO PETROL * TO PETROL PETROL: The vehicle switches over to petrol after 3 seconds that the rpm are below the set ones; * The vehicle automatically switches over to Petrol as soon as the engine rpm exceed the set re-turn values. If this function is selected, it consents to modify the configuration of the system during certain situations, allowing the automatic switching from Petrol to Gas or from Gas to petrol automatically at a given RPM, temperature or Time of injection.
WORKING AT IDLE: - When selecting TO GAS GAS, the engine will work on GAS at idle. PETROL, a small window with an RMP will pop up and you must select - When selecting RE ENTER TO PETROL an RMP setting. Basically, when reaching the selected RPM limit the engine will run on Petrol and it will automatically switch to GAS mode once accelerating over the selected RPM setting. - When selecting TO PETROL PETROL, same as RE ENTER TO PETROL PETROL, but it will switch to Petrol after idling for some seconds.
NOTE: This operation is done and managed by the gas ECU, no action is required by the driver. WORKING AT HIGH RPM: - When selecting TO GAS, the engine will work on GAS at all high RPM range. - When selecting TO PETROL, and after selecting the limit of RPM and the Injection time, the LGC ECU will allow the engine to work on Petrol and will automatically come back to GAS when at lower than selected values.
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Other Options: QUICK GAS CHANGE OVER WITH WARM ENGINE ENGINE, if activated the engine will change over to Gas soon after ignition, provided it reach set Pressure in the system and there is a suitable switching temperature. EXTERNAL EMULATOR EMULATOR: to be used only with the 5, 6 and 8 cylinder model TIME OF OVERLAP OVERLAP: is used to select the time of overlap by using the two fuels (Petrol 68mode. RETURN TO GENERAL SETUP clicking here you will return to GENERAL SETUP SETUP..
Chapter 11 SETUP PROGRAMMING (Trim Setup)
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ATTENTION: Before starting to program program,, set in the type of injector used with the system.
“PROGRAMMING PROGRAMMING”” ENGINE DATA - “ENGINE DATA”; Always input the vehicle engine data. The information is VERY important and it is simple to insert. PARAMETERS OF INJECTION - “PARAMETERS INJECTION”: Before proceeding with the “PROGRAMMING IDLE”, make sure to TYPE OF INJECTOR select the correct “TYPE INJECTOR”. MINIMAL IMPULSE - “MINIMAL IMPULSE”: Select an impulse of 2.0ms when using Matrix rails and 3,4ms when using 3.0 Ohms rails. MMING IDLE PROGRA PROGRAMMING IDLE” and follow the indications. NOTE: DURING THIS PROCEDURE DO - Select “PROGRA NOT ACTIVATE THE “MAP CORRECTOR” OR THE “SET MAPPING”. - After PROGRAMMING IDLE is completed, you can adjust the system by making small corrections on the CONSTANT AT IDLE for idle and CONSTANT AT HIGH RPM for accelerations. - In case accelerations are not satisfactory, ACTIVATE the MAP CORRECTOR The MAP CORRECTOR works just like a BOOSTER. It works just for a few milliseconds only during acceleration. Always select the smallest number (1) to work, then next number ex. 1, 2, 3 etc…until reaching the desired acceleration output. On each number change stop the car and make your acceleration test on each acceleration. SET MAPPING - “SET MAPPING”, this function is used only for emissions tests or in very rare situations in which the car needs to be mapped. See Annex C for details.
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MAPPING If activated it allows the change of the time of injection at any given RPM in function to the pressure MAP. This function is to be used with CARE and ATTENTION. * Absolute Values: It modify a fuel gas injection value as a net value in the selected MAP-RPM area. * Relative: The selected value will add or subtract from a base value in the selected MAP-RPM area.
Chapter 12 ADVANCED PROGRAMMING
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In this area we can manage every and each single injector and can be done as follows: - Activating the Gas Injector will start working or Deactivating the petrol injector will start working The percentage given will give the option to increase or decrease the opening gas time of the gas nozzle for the given cylinder. Chapter 13 SETUP LAMBDA
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- This section of the Software is useful when performing emission tests. We advise not to make use of it for every day application, unless required. Reason is, that in time, the lambdas will become slow or die off. When this happen the system will no longer work on gas unless this function will be deactivated or a new lambda is used. This function allows you to make a better control of the exhaust gasses. - If in need, then make sure to connect Lambda Nr. 1. - Activate the Fast Lambda corrector by clicking and selecting a value from 1 to 16. The values are from 1 less important to 16 most important. - The slow lambda can be activated as well, and is referred to the average calculation of a “X” number of cycles. Basically works on its average. - Click on SETUP LAMBDA for the programming process and acquisition of the same. - LAMBDA PROBE it allows to fix the vehicle’s lambda signal. - LAMBDA THRESHOLD it fixes the medium value of the Lambda Probe signal. - SLOW LAMBDA CORRECTOR this parameter can be activated only if lambda is connected, will correct the Gas air fuel ratio utilizing and ideal average of the Lambda signal. - FAST LAMBDA CORRECTOR this parameter, if selected and if the lambda is connected, will allow to correct the fuel-air ratio utilizing the instant value provided by the system. - LAMBDA MAPPING THRESHOLD it allows the emulation of the lambda signal, if connected thru the
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signal wire. It works in function of the engine RPM and the MAP of the engine. - HIGH EMULATION VALUE allows to fix in mVolts the maximum value of the emulated signal. - LOW EMULATION VALUE allows to fix in mVolts the minimal value of the emulated signal. - LAMBDA SETUP is an automatic procedure to acquire the lambda type signal, provided that lambda probe is connected
Note: If is necessary to utilize the LAMBDA CORRECTORS it is a must to connect the lambda 1 to the ECU wiring as indicated here bellow :
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Chapter 14 HOW TO MANUALLY ADJUST THE VEHICLE 1. It may happen the vehicle cannot be trimmed by the automatic programming mode. This situation may happen when the engine is unstable at idle or when the A/C is on or when the vent goes on very often. In such cases, follow the listed steps to trim manually. ENGINE DATA 2. “ENGINE DATA”: Always input the vehicle engine data. The information is VERY important and it is simple to insert. PARAMETERS OF INJECTION PRPGRA MMING IDLE Trimming 3. “PARAMETERS INJECTION””: Before proceeding with the “PRPGRA PRPGRAMMING IDLE” (Trimming TYPE OF INJECTOR Idle Idle), make sure to select the correct “TYPE INJECTOR”. MINIMAL IMPULSE IMPULSE”: Select an impulse of 2.0ms when using Matrix rails and 3.4ms when using 3.0 4. “MINIMAL Ohms rails. IMPORTANT:: Write down the TIME OF INJECTION OF PETROL 5. VERY IMPORTANT (
) when the engine is RUNNING ON PETROL.
TYPE OF INJECTORS PROGRA MMING IDLE 6. Select “TYPE INJECTORS” click on “P OGRAMMING IDLE”, select “suggested values”. Write down the suggested values related to the ENGINE CONSTANT and the OFFSET INJECTOR. Once written the values exit the procedure.
7. Set in the written values in the area of the CONSTANT ENGINE and the OFFSET INJ. VALUES given on point 14.6. 8. Click on the Lo. Gas Logo located on left bottom side once the reducer temperature reaches 65°. 9. Change the OFFSET INJECTION VALUES (at IDLE), by viewing the lambda on “MONITOR”--see if fuel air ration is rich or lean, and modify accordingly. Then change the ENGINE CONSTANT (at high RPM), by viewing the lambda on “MONITOR” --see if fuel air ration is rich or lean, and modify accordingly. Follow TIME OF INJECTION of PETROL this process until the “TIME PETROL” WHEN RUNNING ON PETROL as per point 14.5 is the same or near to the TIME OF INJECTION OF PETROL WHEN VEHICLE IS RUNNING ON GAS GAS.
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Chapter 15 TROUBLE SHOOTING
DEFINITION A. PC does not connect
CAUSE
CHECK / SOLUTION
1. Interface.
1. Check if interface is working
2. ECU
2. Check all Cables 3. Set
the
Port
Com
on
UTILITY** See annex A to set the Port Com 4. If 12 volts under key has been set on a coil, then the ECU is probably burnt B. PC connects but it does not
Pressure sensor burnt or wet
Change pressure sensor.
C. Values of pressure both the
Pressure
1. Check Electrical connection
MAP and Gas pressure exceed
connected
2. Change pressure sensor
Pressure sensor not working
Change pressure sensor
E. Temperature value is 0 or not
Temperature
1. Check Electrical connection.
shown
working or disconnected
show any pressure values sensor
not
100KPa D. Values of the MAP pressure and/or Gas pressure are fixed sensor
not
2. Change the temperature sensor. 3. Note: In case of emergency ground the sensor. This way the system will in any case change over to gas.
F. Some or all Injectors lights are
Wiring
Check Connections
G. MAP Pressure is lower or
Wrong positioning of the
Change the vacuum port.
higher than 35Kpa / 45KPaMAP
MAP port
Note: keep away from the throttle
White.
butterfly. H. Temperature of the reducer is
1. Lack of water.
1. Add water to the radiator.
cold
2. Air lock in reducer
2. Purge the system/reducer for
or does not increase
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I. Engine does not switch to gas
1. Low water temperature.
1. Add water to the radiator.
2. Empty Gas Tank.
2. Purge for air locks.
3. Solenoid valves do not
3. Check gas level in tank.
4. Lambda SET UP has been
4. Check if solenoid valves open and
activated but the Lambda’s
its wires.
have not been connected.
5. Check the fuse. 6. + 12 volts may not be well connected. 7. Check all electrical connections, specially the injector plugs. 8. Connect Lambda! If the Lambda Corrector is activated.
J. Engine does not switch to gas
1. Gas pressure.
1. System must be filled with Gas and
when clicking on the switch
2. Temperature too low
must have the pressure indicated in point 1.8. 2. Make sure the system has reached the temperature of 65°C. 3. Check if “SETUP SWITCHING” has been set correctly.
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K. Engines Switches to Gas but
1. Low Gas pressure.
1. Check the Pressure on the rail.
return back to petrol
2. Low Temperature.
2. Check the switching temperature.
3. Electromagnetic interference 3. Check that the Pressure of the automatic switching to petrol is not over 20KPa. 4. Check the spark Plugs, and change if used for over 20,000Km. 5. Check if the cable bundles and ECU are far away from high tension cables. 6. Check if there is a loss of tension on the 12 volts 7. Check that the “Automatic switching to petrol� is set between 10 to 20KPa. If already 20KPa then reduce to 10KPa. L. When clicking on the switch the System is not ready for led shows red and it is no longer
1. Wait until temperature is reached. 2. Check the pressure, as it may be
switching
possible to switch to gas
too low. 3. When this happens, manually click on the real switch and wait for the temperature and pressure conditions are met.
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M. The Trimming Idle does not
1. Wrong Engine data.
1. Check Selected Injectors with those
finish.
2. Nozzles too large or too
actually used.
small
2. Set engine values in the unlikely
3. Injectors used differ from
event of having Engine Constant at or
those selected on the TYPE OF near the 200 value, you are required INJECTOR.
to change nozzles to a bigger size.
4. Constant Engine and Offset
Should the engine Constant be at the
Injector Values are far from the 50 value then change to a bigger size working point.
nozzle.
5. Bad wiring connections
3. Check that the minimal impulse is as per the indicated in 3.2 4. In the case of ECU manufactured before September 2007, Check that the under key +12volts is constant. Make sure it is not temporized.
N. Engine Dies off when switching 1. Fuel/Air ratio too Lean or too 1. Manually Adjust the Constant to Gas.
Rich.
Engine or the Offset Injector Values.
2. High Gas pressure.
2. Reducer is leaking, change the
3. No fuel in the Tank.
reducers Shutter Valve.
4. Injector wires.
3. Check the injector polarity and wiring. 4. If reducer’s pressure is too high or too low. See point 1.8
O. Engines looses power during
1. Fuel/Air mixture too lean or
1. Check the Gas pressure set the
acceleration
too rich.
values as per point 1.8.
2. Injector signal is lost during
2. Increase or decrease the
acceleration.
CONSTANT ENGINE.
3. Gas filter dirty.
3. Make sure that the injector signal is present during acceleration (see the green lights on MONITOR bottom right of the screen. The lights should become white only during cut off. 4. Change Gas filter if dirty. 5. Check spark plug cables.
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P. Engine does not run linearly or 1. Air Fuel ratio too rich or too has some vibration.
1. Change or modify the ENGINE
lean.
CONSTANT and or the OFFSET
2. One or more cylinder is not
INJECTOR VALUES. 2. Check the injector wiring and
working. 3. Hose between Rail and the
correspondence between the cylinders
manifold too long or with
and the rail outlet.
different lengths.
3. Check if coils are working and if
4. Wrong rail and cylinder
there is gas flows from the nozzles.
correspondence.
4. Check for the right positioning of the
5. Multivalve placed up side
M/V and if there is enough gas in the
down or low gas level.
tank. 5. Check that all hoses going from the rail to the cylinders have the same length.
E: If intake valves are far NOTENOTE: NOTENOT from the manifold nozzles then use LGC GAS Extension. Q. Illogical values are shown on
Engine has been washed or
the ECU
water has penetrated in the
Change the ECU
ECU R. Level Indicator indicates always 1. Wrong wiring connections. reserve or always full
2. Level sensor type is different
1. Check the wiring connections. 2. Check the sensor signal and match
from the sensor used.
with the one selected in the software
3. Level sensor wrongly
Level Sensor (see “PROGRAMING PROGRAMING”, “Level
installed.
Type Type”). 3. Install and check the installation of the sensor by checking the instructions provided with the level sensor. 4. Check that the float in the tank is free to move, in the unlikely situation that they may get stock.
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S. Vehicle with high fuel
1. Gas leakage.
1. Check for gas leaks
consumption.
2. High reducer pressure
2. Reduce the pressure of the reducer.
T. Vehicle uses both Gas and
Emulator
1. Check that the wires of the emulator
Petrol at the same time
are well connected. 2. If vehicle is a full group there may be a new for a specific wiring diagram.
U. The switch’s led with reduced
1. Wire contacts.
1. Check cables of switch
intensity.
2. Electromagnetic Interference 2. Check
for
high
voltage
interference. V. Lambda always rich or poor
1. Too much or not enough gas. 1. Check and adjust the reducer 2. High Gas pressure
pressure. 2. Change the Constant Engine and adjust the Offset Injector Values. 3. Check the nozzle diameter. 4. Check if lambda is working
W. LAMBDA 1 is connected but
Wrong wires have been
LAMBDA 2 is shown
connected
Check wiring Diagram
Chapter 16 ANNEXS ANNEX A SET THE PORT COM 1. Go to the Control Panel 2. Select “System” 3. Select “Hardware” 4. Select “Management Peripheral” 5. Open PORT (COM&LPT) 6. See the port used may be from 1 to 9 7. Go to the Mach Pro and enter into UTILITY set the PORT COM found in point 6. 8. Now the PC should connect, but wait a few moments after inserting the new Port Com.
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ANNEX B RAIL CONNECTION FOR 6 CILINDERS
ANNEX C RAIL 3 OHM CONNECTION AND WIRING
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ANNEX D FULL GROUP WIRING CONNECTION
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ANNEX E
HOW TO CONNECT 2 REDUCERS IN A 6&8Cyl 6&8Cylss Engine
ANNEX F CONNECTORS GENERAL INFO
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ANNEX G SWITCHING INDICATIONS AND LEVEL INDICATOR ON THE SWITCH
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