fixing rough idle
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Senior User
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fixing rough idle
My truck started idling rough a couple days ago,I searched through the forums and found all the info about the IAC unit. After removing and cleaning i still have problem but not as bad,Unfortunately no one had a new iac in stock(figures!
) . So monday i will be installing new valve. Very glad to have this site to get info from.
) . So monday i will be installing new valve. Very glad to have this site to get info from.
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From: I'm lost somewhere in NJ -- can someone please find me?!?!?!?
Any thoughts on the PCV? From what I understand, a failed PCV can be responsible for rough idel, too. It's easy enough to determine if the unit has failed (just shake it and listen for a rattle -- if it rattles easily, all is well). It's really cheap to replace, too -- some guys do it with minor tune-ups just as preventative maintenance.
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the tach reads around 600-700 at idle ,smoothes out as soon as i touch the gas. I'll take a look at the pcv too. after cleaning the valve and driving the truck it did run a bit better,but not consistently.
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I finally changed my iac. Started truck up,still running rough! Hmm,next i disconnected batt to see if that helped,restarted and still running rough Then ,being the creature of infinite patience that i am ,I took it for a ride .About 2 minutes into the drive the truck was back to idling smooth as glass. Not sure why it worked that way but glad its running good!
Hmm,next i disconnected batt to see if that helped,restarted and still running rough Then ,being the creature of infinite patience that i am ,I took it for a ride .About 2 minutes into the drive the truck was back to idling smooth as glass. Not sure why it worked that way but glad its running good!
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Joined: Feb 2002
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From: Calgary Canada
I suspect the IAC was your problem. Sure sounds like it, it will cause rough idle condition, as it sends an inconsistent signal to the PCM.
Disconnecting the battery was a good move IMHO, the PCM was relearning the curve with everything working for a couple minutes. With any luck, your problems are solved.
I'll keep my fingers crossed for you.
Waxy
Disconnecting the battery was a good move IMHO, the PCM was relearning the curve with everything working for a couple minutes. With any luck, your problems are solved.
I'll keep my fingers crossed for you.
Waxy
