QUOTE(Dave_Darling @ Apr 5 2022, 02:27 AM)
QUOTE(JamesM @ Apr 4 2022, 08:08 PM)
Sounds like fuel to me.
How long does it take you to build proper rail pressure?
Also what motor/injection?
Fuel pressure comes up within the first few seconds of cranking.
The car is a 2.0 liter (1974) with D-jet injection.
QUOTE(76-914 @ Apr 4 2022, 08:34 PM)
Are you saying that the instant the key returns to the on position it coughs like it wanted to start? If so I'd be curious as to the voltage at the coil when cranking.
That is correct, when I turn the key off it gives one cough as if there was a single combustion event. After it does that it will start normally.
I am suspecting the ignition as well, but I haven't yet measured the coil voltage when it is in its failed state.
I hadn't considered the ignition switch; that is a good thought!!
--DD
Dave,
i first thought ignition switch, but, 4-5 years ago i had this problem
and my MPS was failing electronically . so check the mps too, not jus vac, but resistance values on the input leads
-AND this year it happened , the pump would prime then not prime. - it was my fuse / relay board in engine compartment that was shorting out on the injection/pump circuit.
.