Help with dan's high idle code

[S.Bretz]

Danny, check for a vacumm leak. I would suspect a leak for a high ilde.

Also, I woud check the CTS, at colder temps, the engine lets the IAC open more to let in more air, but the idle will be lower then if the IAC is in the same position wen the engine is hot.... you can try swapping the IAT and CTS around to see if that makes a difference. If it does, then you have a bad sensor. This may explain why its also running rich.

If i remeber correctly, you have a 97...they have an adjustble regulator, and vac hose that runs to the regulator. If that hose is leaking, then the fuel pressure will go up and the idle will go up, and the car will run rich.

But firts check for vacuum leaks. When its idleing high, try pulling over and spraying throttle body cleaner around spots tha might be leaking....t-b, vac lines, brake booster line, the intake manifold to head. If you hear a change in idle then you found it.


Also, a cheap easy thing to eliminate is the PCV valve. Its aobut $4.50-$5 at the dealer. Also inspect the PCV hose as they sometimes crack.

[S.Bretz]

PS, try to keep the TB cleaner away from painted surfaces.

[dannsc2racer]

Your the shit Sam. Thanks for the help. I'll try that tomorrow.

[TheMU47]

that's where I found my leak...the PCV valve hose.

When I had a backfire throught the intake, it split the hose coming from the manifold to the valve cover.....just enough for the high idle code / erratic idle.

[dannsc2racer]

No fucking luck guys [img]{SMILIES_PATH}/evil.gif[/img] . I got a new PCV and CTS. The hose is fine. I sprayed the TB cleaner too. I also tried kicking the shit out of it. That didn't work, but made me feel a little better.

[S.Bretz]

Tryed a hammer?

Do you have any adjustments on the SAFC around idle-1800rpm?

[slowion2]

hell check the connections you made for the safc2

it's gotta be something Dan, we've all gone around in circles with it now

[dannsc2racer]

Here's the problem. Got another one from Vinny and it's all good.

[TheMU47]

that'll do it every time.

[Silent Bob]

Hate it when that happens

[slowion2]

so that did it eh?

xrc bastards

[Anonymous]

that > hole in tbplate

[S.Bretz]

My XRC TB did that exact same thing.

It happens because the some of the gasket comes off aroud that bolt when you remove it. Then when you clean it off and put it back on, the gasket isn't there, so there is nothing behind the tb to support it as it is pressed into the intake manifold when the bolt is torqued down.

I epoxied mine back together and it help for a long time. It failed after about 1 week of boost...the exposy wasn't strong enough for that.

If you want dan, bring the TB with you next time we meet up and I can fix it for you and ship it back...or you can ship it here if you are not gonna see me for some time.

[slowion2]

that's probably the best bet, I told him about yours Sam as soon as he told me what happened on the phone. at least it runs ok for him now.

[dannsc2racer]

I didn't race today. The idle is fixed, but the A/F goes from 14.6 into the 11's at idle and stays there. The TB gasket is no good. Im hoping a new one will help, but I dought it.