Fuel trouble

When going from a carburettor system to a fuel injection system it was, as stated by Mark "going from jet-science to rocket-science" On these pages you can track down faults developed in your rocket ;) If one of your sensors is dead, you´l see a flashing green light on your computer. Check out the sequence and try to sort your problems with this help

There are a lot of tests that can be done on all sensors etc. But I haven´t finished that part yet ;) It´s a lot of database entry, and that´s my weak side.....

First the Injector Signal Test; Control Unit Power Supply Test, Main Relay Wire Test, Fuel Pump Power Supply Test, Pump Relay Wire Test.

I have to work on the Injector Wire Test, Throttle Opening Angle Signal Test, Engine Speed Signal Test, Air Temperature Signal Test, Engine Temperature Signal Test, Starter Signal Test and the Boost Signal Test.

Wire Location	Things to do	Testresult	When it´s not so
Injector Connectors (4) (injectorsignal test)	Pull connector loose and put a multimeter/testlight between the connectors.	Testlight should flikker when cranking the engine, multimeter runs up and down.	CPU power supply, Main Relay wires, Injector Wires,Engine speed signal, Starter signal, Main/pump relay, Replace CPU
Control Unit Connector (control unit power supply test)	Put a multimeter (+) on no 16 (Black/Green), (-) on Ground Put a multimeter (+) on no 7 (Blue/Yellow), (-) on Ground	Regardless of ignition switch always 0 Volts If ignition switch is on; Batterie voltage	Check the Black Green wire Check the Blue/Yellow, Main Relay Wires and/or Main Pump Relay
Relay, white connector main relay wire test	Put a multimeter (+) on (Black/Yellow), (-) on Ground Put a multimeter (+) on (Red), (-) on Ground Put a multimeter (+) on (White/Red), (-) on Ground	Regardless of ignition switch always 0 Volts If ignition switch is on; Batterie voltage Regardless of ignition switch always Batterie voltage	Check the Black/Yellow wire Check the Red wire Check the White/Red wire
Fuel Pump, 2-pin connector fuel pump power supply test	Put a multimeter (+) on (Black/Yellow), (-) on Ground Put a multimeter (+) on (Orange/Black), (-) on Ground	Regardless of ignition switch always 0 Volts If ignition is switched on: Batterie voltage for about 5 sec, then 0 Volt If starter switch is switched on or engine speed signal is sent to controlunit; Batterie voltage Otherwise 0 Volt	Check the Black/Yellow wire Check the Orange/Black, Black, Green, Pump Relay wires Check the Main/Pump relay Replace CPU
Relay White Connector pump relay wire test	Put a multimeter (+) on (Black/Yellow), (-) on Ground	Regardless of ignition switch always 0 Volt	Check the Black/Yellow wire
Control Unit Connector, pump relay	Put a multimeter (+) on no 21(Green/White), (-) on Ground	If ignition is switched on: Batterie voltage for about 5 sec, then 0 Volt If engine speed signal is sent to controlunit; Batterie voltage Otherwise 0 Volt	Check the Green/White wire CPU power supply Replace CPU
Relay White Connector	Put a multimeter (+) on (Black), (-) on Ground Put a multimeter (+) on (White/Red), (-) on Ground	If starter switch is switched on; Batterie voltage Otherwise 0 Volt Regardless of ignition switch always Batterie voltage	Check the Black wire Check the White/Red wire
Control Unit Connector injector wire test	Put a multimeter (+) on no 12(Yellow), (-) on Ground Put a multimeter (+) on no 4(White/Red), (-) on Ground Put a multimeter (+) on no 1(Black/Yellow), (-) on Ground	Regardless of ignition switch always Batterie voltage Regardless of ignition switch always Batterie voltage Regardless of ignition switch always 0 Volt	Check the Yellow wire, injector, injector connectors Check the White/Red wire Check the Black/Yellow wire
Control Unit Connector Throttle opening angle signal test	Put a multimeter (+) on no 5(Blue/Red), (-) on Ground Put a multimeter (+) on no 11(Blue/White), (-) on Ground Put a multimeter (+) on no 17(Blue/Orange), (-) on Ground	Regardless of ignition switch always 0 Volt If ignition is switched on: 0.5-5.2 Volt decreasing smootly when throttle opens If ignition is switched on: 7.2-8.8 Volt, otherwise 0 Volt	Check the Blue/Red wire, replace control unit Check the Blue/White wire, Throttle sensor (and position) Check the Blue/White wire, Boost Sensor, Control Unit power supply, replace Control Unit
Control Unit Connector Engine speed signal test	Put a multimeter (+) on no 8(Green) or no 28(Black), (-) on Ground	If ignition is switched on: Batterie voltage	Check the Green, Black wire
Control Unit Connector Air temperature signal test	Put a multimeter (+) on no 6(Blue), (-) on Ground Put a multimeter (+) on no 5(Blue/Red), (-) on Ground	If ignition is switched on: 2.3-3.4V at 20°C, 2.8-4.0 at 0°C, 2.1-2.9V at 30°C and 3.4-4.6V with sensor disconnected Regardless of ignition switch always 0 Volt	Check the Blue wire, air temp sensor, control unit power supply, replace control unit Check the Blue/Red wire, replace Control Unit
Control Unit Connector Engine temperature signal test	Put a multimeter (+) on no 10(Grey), (-) on Ground	If ignition is switched on: 2.0-3.1V at 20°C, 2.6-3.8V at 0°C, 0.52-0.96V at 80°C and 3.4-4.6V with sensor disconnected	Check the Grey wire, engine temp sensor, control unit power supply, replace control unit Check the Blue/Red wire, replace Control Unit
Control Unit Connector Starter signal test	Put a multimeter (+) on no 19(Red/Black), (-) on Ground	If Starter switch is pressed: Batterie voltage	Check the Red/Black wire, Main pump relay
Relay White Connector	Put a multimeter (+) on (Black), (-) on Ground	If starter switch is switched on; Batterie voltage Otherwise 0 Volt	Check the Black wire
Control Unit Connector Boost signal test	Put a multimeter (+) on no 15(Pink), (-) on Ground Put a multimeter (+) on no 5(Blue/Red), (-) on Ground Put a multimeter (+) on no 17(Blue/Orange), (-) on Ground	If ignition is switched on: 1.9-2.8V at 1.013 mb (760 mmHg), 1.7-2.5V at 0.898 mb (674 mmHg), 1.50-2.2V at 795 mb (596 mmHg) and 3.4-4.6V with sensor disconnected Regardless of ignition switch always 0 Volt If ignition is switched on: 7.2-8.8 Volt, otherwise 0 Volt	Check the Pink wire, replace boost sensor Check the Blue/Red wire, replace control unit Check the Blue/Orange wire, Boost Sensor, Control Unit power supply, replace Control Unit
Control Unit Memory Trouble	Remove CPU, change it for another one	If change is succesfull leave it. If not wiring problem	Replace Control Unit

Yellow/Black

Not In Use

White/Red

Blue/Red

: (-) Control Unit

: ( )

: (+) Battery, Injectors

: (-) Boost Pressure, Air Temp, Throttle Position Sensor

Green/White

Brown

Red/Black

Black

Blue/Orange

: ( ) Pump/Relay Driver

: (-) Second Sensor Ground, Blue/Red (!)

: ( ) Starter Signal

: (-) Engine Speed

: (+) Throttle, Boost Gauge/Sensor

Blue

Blue/Yellow

Green

: (+) Air Temp

: (+) Control Unit

: (+) Engine Speed

Black/Green

Pink

: (-) Control Unit, Main/Pump relay, Fuel Pump, Yellow/Black

: ( ) Boost pressure Gauge/Sensor

Green/Red

Grey

Blue/White

: (+) DFI Warning Light

: (+) Engine Temp Sensor

: (-) Throttle Opening Angle

Not In Use

Yellow

: ( ) Please tell me what they are for

: ( )

: ( ) Injector Driver

The numbers run from left to right, starting with the bottom row.