I changed the Idle air valve, what else could be the problem? It starts to jerk after driving for about 30-40 minutes on cruise control/ constant speed, when I pull over the rpm is jumping up and down constantly but the car doesnt' shut down, if I turn the car off and turn in back on, it takes about 4-5 seconds of cranking rather than just a sec cranking to get the engine going again... No check engine light came on. So I dont know what could the problem be...otherwise the car runs fine, also if I put the car in neutral when the problem comes back (rpm fluctuating), if I give a high rpm at about 6000 or more for a quick sec, the problem disappears, but then comes back on after another 30 minutes of constant driving....Whatever the problem is, what I dont understand is that when I put the car in nuetral and give a high rmp for a quick second, it goes away for another 20-30 minutes...very strange....Any help would greatly be appreciated!
Some people already answered the question...thanks very much for your help!
Some people already answered the question...thanks very much for your help!