Help! How to adjust tps

[JOHNNYB]

I was wondering how to adjust tps sensor mine is really loose and it making car idle high.
Thanx

 

[boomdriver]

First step would be to make sure both bolts can be tightened, otherwise the adjustment won;t last. If you observe the way that the TPS operates, rotate the body to get the lever almost to the starting end of its range of motion. Thats just a guess but it will be close enough until a voltmeter can be used to set it to spec. When a meter is connected on the top and middle wire in the 3 wire plug, set it to a reading of 0.55v idle. Lock down the 2 small TPS mounting bolts.
Idle should self adjust after that unless there is some other issue, like vac leaks or timing.

 

[JOHNNYB]

First step would be to make sure both bolts can be tightened,[/B]]F otherwise the adjustment won;t last. If you observe the way that the TPS operates, rotate the body to get the lever almost to the starting end of its range of motion. Thats just a guess but it will be close enough until a voltmeter can be used to set it to spec. When a meter is connected on the top and middle wire in the 3 wire plug, set it to a reading of 0.55v idle. Lock down the 2 small TPS mounting bolts.
Idle should self adjust after that unless there is some other issue, like vac leaks or timing.

I THINK THE PREV. OWNER MUST CHANGED TPS AND LOST SCREWS AND REPLACED WITH REG FLAT HEAD THAT STRIPPED THREADS ON TBANY THOUGHTS?

 

[vetteoz]

I THINK THE PREV. OWNER MUST CHANGED TPS AND LOST SCREWS AND REPLACED WITH REG FLAT HEAD THAT STRIPPED THREADS ON TBANY THOUGHTS?

Used TB may be a better option, if you rethread the holes nextsize up the bolts will probably be too big for the TPS

I was wondering how to adjust tps sensor

Corvette Action Center Knowledgebase :: 1985 - 1991: Technical Article: How to Adjust your Early C4 TPS and Idle Speed

 

[JOHNNYB]

Used TB may be a better option, if you rethread the holes nextsize up the bolts will probably be too big for the TPS


Corvette Action Center Knowledgebase :: 1985 - 1991: Technical Article: How to Adjust your Early C4 TPS and Idle Speed[/QUOTE


THANX FOR ALL THE ADVICE LOVE THE TECH ARTICLE WILL DEFINITELY USE IT

 

[Hib Halverson]

You also might be able to repair the threads by using a thread insert.

I use Timesert brand inserts when repairing threads.

 

[Dustoff529]

THere are several automotive/aviation grade machinable epoxy products out there, check with a machine shop that does aluminum head repair, helicoil, timesert...

Charlie

 

[TedC]

Is the TB made out of aluminum? If so, you can use a low temp brazing rod like HTS-2000. Braze, drill, and rethread.

 

[joshwilson3]

I got one of those TPS wire harness kits that let you hook it up to a multimeter. Alot easier than trying to back prob.

 

[JOHNNYB]

I got one of those TPS wire harness kits that let you hook it up to a multimeter. Alot easier than trying to back prob.

THANKS ILL DEFINATILY USE THAT.STILL KNOW WHERE TO GET ONE?

 

[joshwilson3]

THANKS ILL DEFINATILY USE THAT.STILL KNOW WHERE TO GET ONE?

601-092 at Mid America.