Question about Chevrolet Malibu

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03 malibu won't fire up right away, recently installed new sending unit, runs & idles fine, re-starts fine after short stops. Could the new fuel pump have a denser strainer & causing this? It takes a couple minutes of starter wear to get it fired up, priming the pump a few times doesn't help. Filter? O2 sensor? HEI? Would like some ideas before crawling under this thing again.

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  • Jerry Mace
    Jerry Mace Oct 18, 2009

    Found out that priming the pump with a couple turns of the key DOES help. That narrows it down to the strainer on the new sending unit. A fuel filter replacement also helped, I only prime it one extra key turn instead of three. Still, the end result is worth the money saved by doing the new fuel pump myself.



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  • 14 Answers

I would be looking at fuel pump and the next question would be to check your fuel cap. Does it fail if you was to remove the fuel cap. You may be losing prime this way. If so the purge value in your fuel pump would be bad causing it to lose prime.

Posted on Aug 24, 2017


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SOURCE: 98 GMC k2500 7.4L Rouch Idle

Here is the common cause of surges, stalls at stops, slow idle speed, erratic idle speed, rough idle and engine hesitation (and other problems), it is in most cases the idle speed control air-bypass valve and or throttle valve and upper intake, these area's get full of gunk and combustion residue over the miles and cause idle issues (stalls, low idle) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake

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SOURCE: 1992 buick lesabre starts fine.

You check the coils with a ohm meter. They should 6-8 thousand ohms at the spark plug connections. One lead to one spark plug connection and the other lead to the other . It's not likely a coil for stalling. If coil , Your car can still run on four cylinders. It can be a ignition module. It fails when it gets extremely hot. The module is located under the coils.

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have you considered checking alternator and battery? just a thought

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try replacing the fuel regulator,or is the oil cap on tight?the fuel regulator works on base vacumm

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Before you replace the fuel pump, I would check the cheaiper parts first. Such as fuel filter and injectors.

Posted on Feb 14, 2010

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