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cranks over but will not start. high pressure pump will come on from 1 to 35 min. later and motor will rum great at all speeds. have changed ecu fuil pump and relays still the same turn key on and it cranks great but no high pressure pump them leave key on and when pump does come on motor runs
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simple test.
the ECU only controls the ground path.
the +12v comes from the ign/fuel pump fuse.
at least now you have a spare ECU. -
I have changed pump ecu relay fuse and checked all grounds that I can find motor still does the same thingComment
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have you tried testing/measuring things to see where the problem is?
Is it loosing 12V+ to pump or is it loosing the negative/
Seems that would lead you in a directionComment
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