I have a 1991 cutlass supreme that doesn't accelerate when i press the gas pedal only revs up while driving burning alot of gas as if im going fast but not going any where at all doesnt co-operate i think my transmission needs the filter to be change.
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It's possible that the transmission modulator hose came off the valve or has a hole in it. Check the pass side of the trans for a hose hanging or other problems. If not there, check where it hooks to a vacuum source at the engine.
My 3.4 liter 91 Cutlass Supreme has similar problem when warm the engine misses (car jerks). But its fine at idle and without any accelerator pressure. The SERVICE ENGINE light also comes on intermittantly. I am going to test the ignition coils.
Most likley your engine has alot of miles on it....sounds like the piston rings are bad as well as the valve guides.
You probably need a replacement engine or a rebuild.
Too much oil is getting past the rings and getting burnt where it shouldnt.
Let me know how many miles you have and we can give you further details
sounds like ecm sensor problems.does check engine light come on at all?you may be able to get a code reader at autozone to retrieve computer stored codes, this would more than likely lead you in the right direction.some shops will do a computer check cheap if you are unable to perform this task.however the code readers come with instructions and are user friendly;-)