There is no signal from ecu to fuel pump relay.
My understanding of this, is that when ignition switched on the fuel pump primes and stops then when a signal is recieved from the cranckshaft sensor
to say the engine is turning the ecu sends a signal for the pump to run, the injectors to inject and spark plugs to fire.
With this in mind I tested resistance of shielding on the cranck sensor to earth it was ok, but when I checked the centre signal wire to shieldig wire it came back 47 ohms resistance. Insted of zero as the other signal wire shows. Is this normal or is there a short to earth in this signal wire? And this is why I am not getting a signal to ecu?
Thursday, March 27th, 2008 AT 8:54 AM