measuring the voltage at the ignition coils this also has battery voltage. Once ECU is powered up and engine cranking the voltage drops to 0, allowing the fuel pump to prime. With the ECU plug connected, and ignition is on but not cranking, battery voltage is provided on the pin37 wire to the relay. With the ECU plug disconnected, the wire from pin 37 has battery voltage, on cranking this doesnt change so the relay isnt closed and no voltage is provided to the ignition coils. I believe I have traced the issue with no spark which is actually after 5-6 secs down to the fuel pump signal from the ecu. I have removed the ecu loom plug and cranked the engine - exactly the same happens. I have been able to continue with fault finding. the coil pack A,B was faulty.but that is very unusual. Also make sure you have a live (whilst cranking) going to EDIS pin 6 & ecu pin 28, and to the centre pin of each coil pack also check that SAW (Spark Advance Word) from the ECU is connected to pin 36 of the ECU as some older diagrams show it connected pin 30 which is the Fidle output. However, check you have the wiring correct for the A,B,C,D coil pairs (EDIS pins 8, 9, 11, 12 with 10 to ground). I suspect the battery voltage may get too low after 10 secs of continuous crank. Good, you are making wouldn't be fun if it all worked first time ! The ECU stops reading the PW, RPM and duty cycle after about 10secs on cranking, what causes this? However it still does not fire and removing a ignition lead and spark plug and earthing to the ending confirms that there is no spark. Is the VR sensor affected by the aluminium shroud?ĭoes the shield from the VR sensor need to connect to pin 7 rather than ground? SAW is a straight connection from ECU to EDIS module. The shield of the cable is connected to ground. The other wire of the pair is connected to pin 7 on the EDIS. The PIP wire from the ECU is connected to pin 1, there is a pair of cables within a shielded cable. The shielded cable is connected to ground, Does this need to pin 7. The wires from the VR sensor are connected to the correct pins on the EDIS module. I have a Ford Transit trigger wheel and the VR sensor (this is mounted in an aluminium housing the actual head of the VR sensor is surrounded by aluminium) is located with the smallest gap as possible. I have used the tooth and trigger logger on the diagonistics function on TS, and it indicates no missing tooth. When I turn the ignition key, the rpm number indicates over 20000rpm! And then drops to 0 rpm where by it stays reading 0. I have MAT, Coolant temp and MAP pressure working ok. I have just wired up ms1 extra to a rover v8, however using Tunerstudio I can not get a true rpm signal.
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