Question about 1996 Oldsmobile LSS

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Engine misfire on load when going up hill. Could it be the poppets are dirty and can they be cleaned. Engine has over 100K mile

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  • Dan Sal
    Dan Sal Aug 12, 2008

    I have the same problem, Oldsmobile Cutlass Supreme 1996, my problem didn't
    have anything to do with the spark plugs, wires or coil. I'm bringing
    it in very soon, I'll let you know what the problem was.

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I'd change the spark plugs (make sure they're gapped correctly), wires, cap, and rotor. Those are your main ignition components and the most likely cause of any misfire. The parts themselves should be decently priced (likely a ways under $100), and can be changed relatively easily with basic hand tools. That's your best first bet, and if it still shows that problem, it could be the ignition coil. Try those first and post your results, and we can take it from there.

Posted on Jul 21, 2008

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Had a similar problem with my 1996 88 while out of town. Mechanic was just closing up the night before US Thanksgiving long weekend and luckily took enough to diagnose that 2 of the plug wires had failed. Too late to order parts though. So he dug out the 2 longest wires from a set he took off a customer's car earlier in the week. They worked fine - long enough for us to get home, get through the weekend and then get a new set of wires installed the next week. I still carry those 2 long wires in the emergency kit in the trunk of my "new" 1998. PS there was nothing wrong with plugs or any other ignition parts - just worn out wires.

Posted on May 23, 2010

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Yeah I got mine fixed at the shop, he had to replace my fuel injector with a new one, that with labor costs, was around $350, which sucks, but it runs great now.

Posted on Oct 16, 2008

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Check under your hood at night! Look for spark jumping from wire to wire and look at coil also. Another thing could be the fuel or air filters, or both. This seams quite silly, but the 3.8 is a peppy little 6cyl.!!! Just like sucking on a milkshake with a few stubborn clumps at the bottom! You're trying and trying to get more but the least bit of resistance, and you're blowing back and re-sucking, which slows you getting to the bottom of the cup...., or, "To the top of that hill"! Good luck! And hopefully you didn't waste your time reading this little bit of info!?

Posted on Oct 16, 2008

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