GRAND POOR NORMAL ACCELORATION OVER 30.

1990 Mercury Marquis

Tiny

Daddyo

July, 30, 2006 AT 2:50 PM

This car is killing me its got a complete tuneup in it fuel filter. Its alittle better still it kicks into what feels like 4th gear while in overdrive and it falls on its face, but when I put the peddle to the floor and get passing gear it goes and seems ok. The car only does this when it is in 4th just rolling down the street normally. Please tell me is it injector problem or throtle body problem. HELP!

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1 Answer

Tiny

Mikeybdman

July, 30, 2006 AT 3:41 PM

If it only does it in 4th gear, then it may be transmission related. But if it does it at a certain rpm, or speed, then maybe it might be a speed sensor causing the problem. Pretty strange, that only in 4th.

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