When i usually start my car and press on the gas, it barely moves, but still revs up...almost like having the car in neutral and revving the engine, but it gradually picks up speed and once i hit about 30-40mph it seems to run normal again. then sometimes it will do it again when i stop. the problem seems to be getting worse and yesterday the check engine light came on. what could my problem be?
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if engine is revving and in drive and does'nt move must be a gearbox /drive train problem,is it a manual gearbox ? if it is then i'd say get the clutch changed as pressure plate failure would cause this type of sypmptom let me know how you get on
do you have a transmission problem? if you press on the brake pedel with you left foot and press down far on the gas pedal with your right foot-does the car want to really take off! or does the engine just rev like neutral or slipping with no grip?
If the engine revs up while in drive and running at 40mph, your transmission is probably slipping. Try checking your transmission fluid level. If it is OK, I would get it by a garage to have them look at it to cofirm.
Have someone handy to press the gas pedal for you after the engine has warmed up well; best if driven.
While you listen at the exhaust pipe, have your helper increase the revs slowly and note whether the exhaust note changes to a hiss, instead of the sound of an engine firing.
You may have a decayed catalytic convertor and when they come apart inside, they can clog mufflers and resonators (the second, smaller muffler).
I've had this happen on more than one car and when it happened on a Fiat Strada years ago, since the routing of the system was fairly straight and made of heavier gauge stainless steel, I fired two shots with a .357 magnum into the tailpipe.
Never had another problem with it.