kl92gt

the other day my car started having problems idling so i took off and cleaned the IAC and it still didnt help i had another IAC laying around and it didnt help either so i took it off and just blocked the IAC with a peice of metal and it idles fine then i put the IAC control on and unhooked it while running and it ran fine then can i leave it umplugged or should i buy a new one

kl92gt

the idle surges from like 1500 to 500 and sometimes cuts out any ideas

roadrunner

I have the same problem. I think it might be the egr valve, but im not sure, I havent had the time to check it out

kl92gt

yea i was thinking that to because i ripped the gasket when i put it on so i use silicone where it ripped and i think its still leaking

90GTRagtop

Have you checked the salt and pepper connectors? I've read on this site in several posts that they can have a bad connection and cause exactly the problem you're describing. Search this forum for "Salt" and "Pepper" and you'll see the posts I'm referring too. A bad connection appears to make the IAC continuously hunt for the right spot.

kl92gt

yea i just tried that didnt work either

blkgt50

I had the same problem, I checked my timing (was at 6 btc now at 12 btc), cleaned the iac, and also checked the tps. Mine was at .65 volts, I got it to .98 - .99 Volts. I don't have the idle problem now. Check thoughs.

90GTRagtop

Have you checked carefully for vacuum leaks?

kl92gt

is there a certain guage need to check the tps volts. also i think i might have a little vac leak from the egr gasket would this cause the crazy idle

90GTRagtop

For the TPS, use a DC Voltage meter. You may want to read the articles here; http://www.muscularmustangs.com/maintain.php

A vacuum leak could be the source of your problems, especially if it were variable. You might also try resetting your computer by disconnecting the battery for around 30 minutes and see if that changes anything.