High Idle Woes

[BALTANAKT]

- Cleaned IACV *twice* recently
- Both times b/c high idle
- Last time i pulled it (a couple months ago) it was perfectly clean
- Had a low idle recently (maybe around 450)
- Went wheeling last weekend
- Now have a high idle on start
- Jumps up to 1500 for a minute

Thinking maybe vac leak? TPS?

Any ideas?

 

[Unclewolverine]

Most likely one of those two. Any other driving issues? Tps will usually cause surging and bad shifting. Old vacuum lines can develop cracks easily.

 

[Tim_MN]

What have you tested, and what are the test results ?

 

[BALTANAKT]

Yeah I have noticed the shifting seemed a bit funny lately. I'll pick up a new tps for it.

It's only doing this on start up, which makes me think not vac leak related. Cruise has been working great too.

 

[RCP Phx]

You should include your year at least in your profile, if not in every post!

 

[BALTANAKT]

^ Agreed, I'll update that. This is all regarding a '91.

Results

- Added new TPS from NAPA and problem is solved
- However, don't like the new shifting in cruise
- Kicks down a gear too soon

Also, a note: I had replaced this TPS about 6 months ago. I think the unit was from Oreily's. So, lets see how long the NAPA piece holds up. It was about $90 so it better last.

 

[Unclewolverine]

Adjust your TV cable until shifting is satisfactory

 

[cruiser54]

https://www.cherokeeforum.com/f2/free-quick-fix-41821/