Help, what should I do next after fuel pump replacement doesnt help start
Thread Starter
Junior Member
Joined: Sep 2017
Posts: 6
Likes: 0
From: Illinois
Car: 89 Camaro IROC-Z
Engine: 5.7L/TPI
Help, what should I do next after fuel pump replacement doesnt help start
Hello guys im new to this page and to the 3rd gen world since I just bought this car off of my uncle thats had it in the garage forever and Hes never bothered to mess with it so I bought it, im having some issues with an 89 IROC with the 5.7 I tried to start it at first but all it did was crank and no start so one of my friends told me to check a little valve to see if I was getting fuel (i dont know the name of the valve) and I checked it there was no gas. I also couldnt hear the fuel pump buzz when I turned the key to the on switch so I changed the fuel pump and the fuel filter, now fuel shoots up when I press the little valve but all it does is just crank and no start like before I was going to change the fuel regulator to see if maybe that would help start? What do you guys think?
Joined: Dec 2004
Posts: 16,774
Likes: 1,002
From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: Help, what should I do next after fuel pump replacement doesnt help start
What's the fuel pressure at the schrader valve ?
Got spark and injector pulse ?
Got spark and injector pulse ?
Thread Starter
Junior Member
Joined: Sep 2017
Posts: 6
Likes: 0
From: Illinois
Car: 89 Camaro IROC-Z
Engine: 5.7L/TPI
Re: Help, what should I do next after fuel pump replacement doesnt help start
Yeah I checked my distributor and spark plugs and I got spark, Im going to have to check the pressure on the Schrader Valve though.. Do you know what It should be at by any chance?
Joined: Dec 2004
Posts: 16,774
Likes: 1,002
From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: Help, what should I do next after fuel pump replacement doesnt help start
Tpi 43.5 psi, if that's ok sounds like your injectors are plugged.
Thread Starter
Junior Member
Joined: Sep 2017
Posts: 6
Likes: 0
From: Illinois
Car: 89 Camaro IROC-Z
Engine: 5.7L/TPI
Re: Help, what should I do next after fuel pump replacement doesnt help start
Does that mean clogged?? And If so is there anyhing I can do to unclog them or should I just replace them?
Joined: Dec 2004
Posts: 16,774
Likes: 1,002
From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: Help, what should I do next after fuel pump replacement doesnt help start
Plugged clogged either, you can have them serviced or replace them. If they have a grey body on them definitely replace them. You can check injector pulse with a noid light.







