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Intermittent engine revving

Old March 13th, 2019, 4:06 PM
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Default Intermittent engine revving

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?
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Old March 14th, 2019, 12:14 AM
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Originally Posted by K5Enthusiast View Post
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.
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Old March 14th, 2019, 8:47 PM
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do you feel it or is it only visual?
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Old March 15th, 2019, 1:35 PM
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Originally Posted by Irish_alley View Post
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.
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Old March 15th, 2019, 1:37 PM
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Thank you "Oil Can Henry".
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Old March 16th, 2019, 1:44 PM
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Originally Posted by K5Enthusiast View Post
Thank you "Oil Can Henry".
No problemo! I hope this will repair your vehicle to normal opertations.
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Old March 16th, 2019, 3:15 PM
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theres info on how to test the tps on this link Troubleshooting sensors and how to test
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