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1990 Firebird no fuel pump, no injector pulse.

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Old May 29, 2023 | 04:56 PM
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1990 Firebird no fuel pump, no injector pulse.

There’s a 1990 Firebird, I’m working on, 350 TPI.
Fuel pump will not prime when the key is on. VATS system is working. I can get the fuel pump to run if I use the jumper by the relay. But then there is no injector pulse. car fires up just fine with starting fluid so I know it has spark. I already checked what I think is the fuel pump fuse, it’s not blown. Everyone says it’s near the battery, but I found it near the driver side in front of the radiator. Nothing by the battery. All of the fuses inside the car are good. Any other pointers? I don’t wanna be throwing parts at the car.
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Old May 29, 2023 | 04:58 PM
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Re: 1990 Firebird no fuel pump, no injector pulse.


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Old May 29, 2023 | 05:03 PM
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Re: 1990 Firebird no fuel pump, no injector pulse.

Is the check engine light on key on ?
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Old May 29, 2023 | 11:40 PM
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Re: 1990 Firebird no fuel pump, no injector pulse.

Originally Posted by Tuned Performance
Is the check engine light on key on ?
Thanks for pointing that out. I didn’t even notice it. There is no check engine light with key on
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Old May 30, 2023 | 08:10 AM
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Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: 1990 Firebird no fuel pump, no injector pulse.

Sounds like the ecm isn’t powered up. The fuse for pump/ecm is in a plastic holder on the fender.
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Old May 30, 2023 | 06:52 PM
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Re: 1990 Firebird no fuel pump, no injector pulse.

Originally Posted by Tuned Performance
Sounds like the ecm isn’t powered up. The fuse for pump/ecm is in a plastic holder on the fender.
that’s the first thing I looked for. I found one on the driver side close to the radiator in a fuse holder. But not near the battery like everyone says it should be.
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Old May 30, 2023 | 07:05 PM
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Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: 1990 Firebird no fuel pump, no injector pulse.

Look by the charcoal canister

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