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Car starts fine idles a bit rough accelerates to about 30 then wants to cut out

(1990 Oldsmobile Cutlass Ciera)
in Amanda, OH on November 06, 2014
will hardly pull itself up a grade more than 30mph .had same problem this spring , replaced tps and mafs no help, new plugs n wires , checked fuel pres. ok replaced coil module that seem to fix it,. for a few months now doing the same thing, had new module checked . it checked good . also new oxy sensor last spring. im stuck on this one might have to take it to a real mechanic .this car shows no codes.
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Popular Answer
on November 06, 2014
A 'real' sanner with live data needs to be connected and viewed by a real mechanic while vehicle is being driven...fuel pressure test guage can also be connected for this drive!!! .... OR you can just keep on guessing at it!!!!!
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on November 06, 2014
Try estimator at top of page.
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on November 06, 2014
I would start looning toward a fuel pump issue test the fuel pressure at the rail also possibel bad gas, i had a grand am do this got water in fuel, pressue tested fine but bad fuel flow, i replaced the pump and also the plugs ran great after that it. U might wanna check your fuel qaulity
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on November 09, 2014
checked fuel pressure , checked ok ,even on a pull, pressure stayed about steady , car cut out at 30 wouldn't accelerate any faster. installed new fuel pump and strainer , waste of money there.car still cuts out at 30 and will not go any faster. think it is coilignition module , but had it checked , they say it is ok . could the computer be bad ? about the only thing I havn't tried.
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