85 vette stalling
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6th Gear
Joined: Sep 2018
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85 vette stalling
my 85 has had a ton of new parts put on it from cam lifters injectors fuel pump distributor ecm complete tune up now the car starts for a second then stalls everything I test seems to be within specs what shod I try and could I get a wiring diagram for the injection system please
Safety Car
Joined: Aug 2009
Posts: 3,751
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From: Melbourne, Victoria, Australia
my 85 has had a ton of new parts put on it from cam lifters injectors fuel pump distributor ecm complete tune up now the car starts for a second then stalls everything I test seems to be within specs what shod I try and could I get a wiring diagram for the injection system please
The ECM will give the fuel pump relay a run signal for a few seconds when cranking the engine, after that the ECM looks for the distributor reference pulses or will de energize the fuel pump relay.
Check the Schrader port on the fuel injector rail, check there is 30 to 35 psi fuel pressure. (The later C4 ran 38 to 42 psi with 19lb injectors, the 85 has 24lb injectors so lower fuel pressure).
You can remove the fuel pump relay cover, and close the contact with a cable tie for a test.
Good to know it can get you home if the ECM doesn't keep the relay energized.
Good Luck
Team Owner
Joined: Jul 2004
Posts: 28,424
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From: Hartford WI
my 85 has had a ton of new parts put on it from cam lifters injectors fuel pump distributor ecm complete tune up now the car starts for a second then stalls everything I test seems to be within specs what shod I try and could I get a wiring diagram for the injection system please
Last edited by aklim; Sep 9, 2018 at 10:30 PM.
Drifting
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From: Nashville TN
2017 C4 of Year Finalist
