Spark plug replacement and now have a miss at idle

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Apr 3, 2009 | 10:14 AM

#11

w9awx

Thread Starter

Junior Member

Joined: Dec 2008

Posts: 13

From:

Spark plugs

The plugs are inexpensive. Takes all of 10 minutes to replace them. Maybe I'll throw a new set in just in case one has a bad porcelain or something.

Does anyone know if I have to pull the throttle body to get the IAC motor off? If so, i assume there is a gasket of some sort between the throttle body and the plenum.

Apr 7, 2009 | 11:55 AM

#12

Joel_CA

Senior Member

Joined: Sep 2005

Posts: 490

From:

Quote:

Originally Posted by w9awx

Well, it is back. Sometimes when I start my car up, sometimes it will stall. The check engine light comes on, but, because of the year, it doesn't store a code. I've heard something in some posts about possibly being a bad idle control motor. I know it is on the throttle body opposite the intake from the TPS. How do I know if this is the problem?

If the engine stalls and the check engine light automatically comes on because the key is still in the run position. It doesn't necessarily mean the ECU picked up a fault code. When you did any recent service to your car, did you disconnect the battery at all? If so, you ECU will need time to relearn its idle adaptation. You can speed the process by disconnecting the intake hose to the throttle body- and clean the area around the bore with a rag soaked with throttle body cleaner.
Also- if you haven't had a valve adjustment in a while- your rough idle can be due to that as well.

JJ