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89 Grand am Want start on it's on
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SillyBilly
Novice
Mar 16, 2008, 5:05 AM
Post #1 of 2
(1823 views)
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89 Grand am Want start on it's on
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I have a 89 Pontiac Grandam 2 door with A/C, automatic Transmision. I had a problem with the vehicle not starting and trouble shooted down to the computer, so I replaced it and it ran fine for a few days. Now as long as I prime the throttle body with fuel directly it will not start. After I get it started, it will idol just fine for as long as there is fuel in the tank, but if I floor the gas pedal, it will fall on its face and die if you keep it at full throttle. I replaced the fuel regulator on the throttle body, the fuel filter, and the throttle body gasket, but still the same. I bought a fuel pressure tester but my lines are threaded and I can not get it to hook up, but at the fuel filter there is a lot of pressure when I crack it open, so just asuming fuel pump is ok. I here the pump kick on when I turn on the key so atleast that part of the pump is correct. Any tips? The injector sprays fine after I get it going by priming it.
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DanD
Veteran
/ Moderator
Mar 16, 2008, 7:33 AM
Post #2 of 2
(1817 views)
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Re: 89 Grand am Want start on it's on
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I’m assuming this is a four cylinder because of you saying throttle body gasket and no fuel test port?
Regardless I think you should make sure of the fuel pressure; it’s hard to tell the difference between 5psi or 15psi which is approximately what a four cylinder needs to run properly.
There is a replacement fuel filter available that has a test port incorporated in the end. I get mine from a company called FMSI part #4261; nice easy way to test pressure without having to modify the fuel lines.
Here’s a link to there web site not sure if they’re in your area but there has to be another company out there that will have something simular?
http://www.fmsiinc.com/Default.htm
Dan.
Canadian "EH"
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