high idle

[tpepmeie]

Originally Posted by Demps

First thing I would check (since you just performed work) is the hose under the throttle body. You can see the "L" shaped fitting pointed aft from the driver's side under the TPS-->get a small flashlight and mirror. If not attached, you will have a high idle. Sometimes you can attach it without removing the plenum again. The rubber hose has a compression-type clamp on it.

Also, the TPS is adjustable and should read correctly.

Ted

I'm with Ted... the canister purge hose under the front driver side of the plenum is likely disconnected, which will cause the massive air leak = high idle. That was the first troubleshooting I did on my '91 back in 1999.

[XfireZ51]

Originally Posted by tpepmeie

I'm with Ted... the canister purge hose under the front driver side of the plenum is likely disconnected, which will cause the massive air leak = high idle. That was the first troubleshooting I did on my '91 back in 1999.

He mentioned that it had a high idle even before he did the plenum removal.
So whatever is causing high idle hasn't been affected.
Surprising he 's not getting code for LO TPS V.

[Pete]

Basicly you have a vacuum leak.

I spray a mist of water around the gasket and vacuum ports/hoses if the idle starts to fluctuate you found your vacuum leak,good luck.

You need to adjust your TPS to .55
You need to have 10-20 IAC counts at idle.

Pete

[WB9MCW]

Originally Posted by XfireZ51

He mentioned that it had a high idle even before he did the plenum removal.
So whatever is causing high idle hasn't been affected.
Surprising he 's not getting code for LO TPS V.

But a pointed out here this does not seem to be your issue.

Perhaps it is the PROM chip thing.

For those of us lucky to live close to Haibeck a simple drive to his shop and review would be the key to success.

You may want to email him and have him read this thread and work with you to solve your issues IMO.

He would know best what to try next and get you to an ultimate solution.

That is why he is the ZR-1 specialist. No one knows em like Haibeck does as many will attest too.

Now there are others who are also very good with the ZR-1's like SGC and DRM not to slight them at all. Or Jeff at PNW ZR-1.

But I like to support those who advertise here >> http://zr1netregistry.com/index.htm

or like Jeff who is on the forum here all the time with advise etc.

We support those who support us.

[WB9MCW]

Originally Posted by tpepmeie

I'm with Ted... the canister purge hose under the front driver side of the plenum is likely disconnected, which will cause the massive air leak = high idle. That was the first troubleshooting I did on my '91 back in 1999.

This was an early post in the thread that was telling you of this common problem