1992 Oldsmobile Cutlass Supreme Bucking Fix

OLDSMOBILE
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1992 cutlass supreme 3.1 liter. i have 105000 miles and had no problems until i used a fuel system cleaner mainly methanol. now at low rpm's engine skips and bucks and is sluggish as speed builds up. once above 2500 rpm (guesstimate) bucking stops. accelarating to hiway speeds still seems to have less accelaration but no bucking. once at hiway speeds and engine settles into overdrive bucks and skips return. drop shifter to regular drive and the bucking stops. still sluggish.
Jun 6, 2006 at 4:01 AM
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LOSONE
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Your fuel cleaner dislodged some bits of small debris and deposited them in the injectors. The only solution is have the injecors power cleaned by a pro and if that doesn't do it, replace the injectors.
Jun 6, 2006 at 6:28 AM
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Suggested Repair

Have the fuel injectors professionally power cleaned. If that does not stop the bucking, replace the injectors.

Conversation Summary

The owner of a 1992 Oldsmobile Cutlass Supreme 3.1L with 105,000 miles reports bucking, skipping, and sluggish acceleration at lower RPM after using a methanol-based fuel system cleaner. Bucking stops above about 2500 RPM and in regular drive at highway speed, but returns in overdrive. The expert says the cleaner likely dislodged debris into the injectors and recommends professional injector power cleaning, then injector replacement if cleaning does not fix it.

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