Question about 1996 Pontiac Bonneville SE CA Value

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1996 Pontiac Bonneville Misfire

My 1996 3.8L is misfiring. Runs fine cold, but once it warms up a bit, it will misfire while sitting at a light or during normal acceleration. Code reader says I have a P0300, Random misfire, although the check engine light is not illuminated. Also, the Traction Control light comes on sometimes, then goes out. I think this means it is not on as that is same response you get when you cycle the Traction Control Switch to the off position. Next step I was thinking about was to pull off the plug wires one by one from the coils to see if one doesn't make a difference. Recent new parts include, fuel pressure regulator diaphram, idle air control, cam sensor, crank sensor, intake manifold and spark plugs (these were all for troubleshooting a stalling problem. Fuel pressure regular diaphram was the culprit.

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  • mooreruss Mar 19, 2009

    Number 4 plug wire came apart between the wire and the plug end boot. Installed all new wires. All fixed now.

  • Anonymous Mar 22, 2014

    randomly stalls and will start back up right away. Replaced plugs, wires, fuel filter and crank sensor.

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Change spark plugs and wires

Posted on Mar 19, 2009

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