Hondo99

iTrader: (2)

I have a 99 T/A, as i was driving today the RPS stayed @ 2900-3100 RPMs when i would try to shift. It acted like i was giving it throttle the whole time. When i was going to stop signs and red lights i would place it in neutral but the RPM stayed in the high range. The only time it would drop is when i was at a complete stop, Even when i was coasting at a couple of MPH it would stay close to 3K RPM. What could be telling it to rev up on it's own? Thanks for any info

dreww

iTrader: (1)

So you're saying that when you come to a complete stop, the rpms go back to normal idle speed?

I would say tuning issue, but it just happened out of the blue right? So probably a sensor going bad. Any check engine lights/codes?

jlrz28

iTrader: (7)

Sounds like the tps

jimmypop13

iTrader: (17)

Could be tps or even the idle air controller going bad. But if this has been happening since you got the car and it has a tune, it could be tune related with the throttle follower /cracker tables. Also check that the idle set screw isn't too far in or if someone drilled too large of a hole in the throttle blade. If the car is stock, you probably only have to worry about the throttle position sensor but I've heard of vacuum leaks causing this too