Fuel pump won’t run until oil pressure gauge reads pressure
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Joined: Aug 2023
Posts: 1
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From: Illinois
Car: 1986 Z28 Camaro
Engine: Tuned Port Injected 305 small block
Transmission: 700R4
Axle/Gears: 2.73 gear ratio
Fuel pump won’t run until oil pressure gauge reads pressure
Hi guys, been having a slight problem with my 86 TPI camaro for quite a while. After letting the car sit for over an hour, the fuel pump fails to run and build pressure. However, after the engine has been turned over multiple times and the oil pressure gauge is reading pressure, the fuel pump can be heard running and the car starts almost instantly. Anyone have any ideas on what this could be and how to fix it? Thanks in advance guys
Joined: Dec 2004
Posts: 16,853
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From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: Fuel pump won’t run until oil pressure gauge reads pressure
No 2 second fuel pump prime from the ecm ?
have you checked for power at the pump relay or tried a different relay?
have you checked for power at the pump relay or tried a different relay?
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Joined: Oct 2007
Posts: 169
Likes: 12
From: Calgary AB
Car: 1992 T/A convertible
Engine: LB9 TFS175heads Ebase/accel runners
Transmission: T5 5spd
Axle/Gears: 4.11
Re: Fuel pump won’t run until oil pressure gauge reads pressure
Fuel pump relay, These cars have a redundant electrical path to the fuel pump that runs through the oil Pressure switch so that in the event your fuel pump relay fails you will not be stranded. The symptom is long crank time.
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