1991 Buick Century custom won't start after driving for 15 minutes
#1
1991 Buick Century custom won't start after driving for 15 minutes
So here a list of the things I replaced so far. I'm pretty sure it'* a fuel transfer issue.
Replaced the Ignition control module.
Replaced the Crank Position sensor.
Replaced the Fuel Pressure regulator.
Replaced the 3 coil packs. (the spark was little to none)
Replaced spark plugs.
Now my car only has one symptom left...it won't start up after driving it. I can drive it for 45 minutes or even just 5 minutes on a cold start. But once I park it and come back to it 10-20 minutes later, It will crank and crank and crank but no ignition. If I let it sit for a few hours it will start no problem. But for some reason it doesn't like warm/hot starts. The guy who I let change my oil today said that it looks to be the fuel pump. He tested the relay and it seems fine to him. And he was in vehicle maintenance for 25 years in the Air Force. What do you guys think it could be?? There is a beautiful spark with the new coils and spark plugs. So that'* why I think it'* a fuel issue.
I'M RUNNING OUT OF OPTIONS!!! ........and money lol.
Fuel pump maybe???
Replaced the Ignition control module.
Replaced the Crank Position sensor.
Replaced the Fuel Pressure regulator.
Replaced the 3 coil packs. (the spark was little to none)
Replaced spark plugs.
Now my car only has one symptom left...it won't start up after driving it. I can drive it for 45 minutes or even just 5 minutes on a cold start. But once I park it and come back to it 10-20 minutes later, It will crank and crank and crank but no ignition. If I let it sit for a few hours it will start no problem. But for some reason it doesn't like warm/hot starts. The guy who I let change my oil today said that it looks to be the fuel pump. He tested the relay and it seems fine to him. And he was in vehicle maintenance for 25 years in the Air Force. What do you guys think it could be?? There is a beautiful spark with the new coils and spark plugs. So that'* why I think it'* a fuel issue.
I'M RUNNING OUT OF OPTIONS!!! ........and money lol.
Fuel pump maybe???
#3
Senior Member
Posts like a Supercharger
Fuel injector that is shorting (it kills them all by design of the circuit). The 'Multitech1' injectors are known for this annoying behavior. At least they are easy to disconnect on the 3300.
#4
Senior Member
Posts like a Supercharger
Good injectors should each measure 12 ohms. Anything less is failing. There is no repair of this generation injectors. They are internally a 'wet' design, which contributes to their flaws.
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