Question about 1987 Oldsmobile Cutlass Supreme

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Engine bogs out & looses compression at high rpms

My 3.8 liter V6 engine fires up & idels fine. I can drive it up to about 25 mph on flat surfaces. The engine seems to bog out at high RPMs (while in gear & in park). I cant get it over 5 mph on an incline. It almost seems to loose horsepower or gas. i've changed: the carburator, fuel pump, wires, plugs, timing, cap/rotor, verified firing order & it still runs the same. I've even disconnected the oxygen sensor & nothing. This thing is nickel & diming me to death. Does this problem sound familiar? Do you have any suggestions?
Thanks!

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  • sac14sic Apr 13, 2009

    just got back from the garage. I am very pleased to say that I cut off the converter & the car runs great! Thank You! Saved me time & money........

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Sounds like catalytic converter to me




james ray

Posted on Apr 13, 2009

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  • 26 Answers

I agee just had same prob. C.C. just diconnnect. be careful with the gasket.

Posted on Dec 04, 2011

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