I have a 1999 Chevy Tahoe that has acquired an intermittent engine revving while driving. It has happened at 35 mph and at over 50+ mph on the highway. I can see the tach "jumping" up and down while it revs up. I just had a new idle motor put in it, but it still has the same problem. Anyone else have this problem?

 

Probably intermittent throttle position sensor.

 

do you feel it or is it only visual?

 

I can see the tach "jumping" up and down and I can hear the engine revving. I see and hear, but I really don't "feel" anything - it doesn't feel like the truck is moving any faster.

 

Thank you "Oil Can Henry".

 

No problemo! I hope this will repair your vehicle to normal opertations.

 

theres info on how to test the tps on this link Troubleshooting sensors and how to test