97 grand cherokee laredo 4.0L 6cyl. select track 4x4.....131,000 miles...
aight so heres the low down, i drove to my parents house twice today (back n forth) to move some stuff, ran fine all day, soon as i was leaving turned it on like normal and the rpms went wayy up like i was stepping on the gas.thought it was odd so i just it off n started again. same thing as soon as put it into drive it jerked (such high rpms) but my foot was on the brake and the rpms went back down to about 1000. so when its in park or neutral itll rev super high but when in drive its fine..the issue is when i let off the brake the jeep wants to drive its self, it accelerates and even shifts fine but i dont have to even have my foot on the pedal... i looked to see if the throttle cable was stuck and it doesnt appear to be, also my display center is flashing like the battery went dead or disconnected, cables and terminals are really tight and clean, but all my radio stations are still preset...any body got any ideas of wtf is goin on?...no check engine light on
It's just more noticeable with no load. It slams into gear when the RPMs are higher, but the then it's not as noticeable. Depends on how big the leak is. The higher RPMs means the engine is getting more air from somewhere. Which to me means IAC or a leak. IAC could be intermittent.
It sounds like the tps. Had the same problem when I was in nc. It got wet and would idle realy high intill it was in gear. Bought one at the parts store for like 56 bucks but it fixed it. You could also try to put a hole in it to try to let it dyr out if it may have gotten wet