Quote:
Originally Posted by johnny485
Now, the engine fires on the first turn but does not sustain so a look in the Fuel pump dept showed 12V to be there but continuous drive.
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+12v is supplied by the ECCS/EFI/Management Relay to the pump + connector when the key goes to stage 2. It is a constant feed.
The control is done one the negative/ground side - which runs back through the ECU which regulates the voltage that is allowed to return through the fuel pump.
If you can download the service manual (available from club-s12), then look at page EC-33 for voltage levels and how to measure. Page EC-12 has a full diagram of the ECCS wiring which helps show how the pump is wired, and EC-66 shows test procedure and ECU pin for pump return.
This has caused me many headaches on my car!
Good to hear you are starting to get it working right again!
30-07-2013, 01:20
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