Question about 1992 Pontiac Bonneville

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Car needs help,, so do i!!

The engine runs great until it starts to warm up and then it seems that the fuel pump gets a signal to stop pumping and,,, kaput! I've changed the water temp sensors, removed and cleaned the throttle body and cleaned all 3 sensors. I replaced the coil assy, starter. The idle air control valves measurement was correct. And I am showing no check engine light.

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Connect the ECU (computer module) to a scanner and get error codes in return. This will tell you something about the problem.

You can buy a code reader, or better, perform the operation at any qualified garage.

Posted on Oct 07, 2008

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Seem to be and gas problem. Check if your gas pump is working properly - Just remove the hose that is coming from the gas pump. If no gas, the pump must be replaced.

Posted on Oct 07, 2008

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  • Expert
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Hey Hismustangma,


Its not a sensor of any sort its just your Fuel Filter that hasn't been replaced for a long period of time. Try changing that and you'll be good to go. Let me know if this helps and anymore questions feel free to express it.


Jaketasnake out

Posted on Oct 07, 2008

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Posted on Jan 02, 2017

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1 Answer

How do i know what to fix?


You can't rule that out, a computer failure, but some testing would have to be done to truly determine the cause. The computer should send a signal to the fuel pump relay to turn the fuel pump on, both at key turned to on, and when key is in start-cranking the engine over. If you have to use starting fluid for hot restarts as you described (will it stay running then after starting it with the fluid?)...then it seems to be a fueling problem. I would say check fuel pressure, auto parts stores rent or loan them. It may be, for whatever reason, the pump is not being turned on through the fuel pump relay when it won't start without starting fluid.

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The car may be hard to start because it may need a normal tune-up. If the spark plugs are pretty used, they will slowly stop burning as much fuel because the spark slowly gets lesser and lesser. On a cold day the fuel is harder to ignite with a small amount of spark.
Normal idle when its cold means that your cars idle is probably too high. If you lower the idle, the choke on a cold day will keep the idle a little higher until the motor warms and then it will kick back off. If the idle is too high, it will run very rich, smothering itself with fuel, and causing the idle to stay low. When the car warms, its creating better spark when its warm, and with the idle being too high its running at a fast idle.
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Have a nice day. -Steve

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