1999 GMC JIMMY
125,000 MILES
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Vehicle stalls out under when slowing down or stopping usually starts right back up.
Jan 3, 2013 at 11:35 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.
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WRENCHTECH
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You may have a bad IAC ( idle air control) but try eliminating any vacuum leaks and cleaning the throttle body first. Remove the intake snorkel, have someone hold the throttle wide open for you and scrub the back side of the throttle plate and surrounding bore with an old tooth brush and some carb cleaner. Be sure to spray some into the small holes next to the throttle plate. That should help stabilize the idle. If it still has a problem, replace the IAC.

Jan 3, 2013 at 11:42 PM
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RASMATAZ
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Do you have a check engine light? Might want to disconnect the TCC Solenoid and see what happens-could be sticking-start here
Jan 3, 2013 at 11:42 PM
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RASMATAZ
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Sorry Wrench, didn't see you-I hope you had a wonderful Christmas and New year. I'm good talk later my friend
Jan 3, 2013 at 11:45 PM
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WRENCHTECH
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No problem Ras. Happy Holidays to you too.
Jan 4, 2013 at 12:02 AM
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RASMATAZ
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BTW, I've learned that from you on the TCC solenoid at About -7 years ago-Thanks
Jan 4, 2013 at 12:07 AM
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WRENCHTECH
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That's not as big an issue on this later model stuff. You can't simply unplug a connector on these because most of the transmission is electronic control.
Jan 4, 2013 at 12:15 AM
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RASMATAZ
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I get it, learn something new again-Thanks
Jan 4, 2013 at 12:22 AM
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KIMBENOITCONNER
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How do you disconnect the TCC solenoid?
Jan 4, 2013 at 12:49 AM
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WRENCHTECH
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You can't
Jan 4, 2013 at 12:51 AM
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KIMBENOITCONNER
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Oh, ok. Any other thoughts? We tried changing the IAC & it didn't help.
Jan 4, 2013 at 12:53 AM
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WRENCHTECH
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Did you scrub the throttle body as I instructed?
Jan 4, 2013 at 12:55 AM
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KIMBENOITCONNER
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Yes, had already done that before the IAC. It was very nasty, but didn't improve the problem.
Jan 4, 2013 at 12:56 AM
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WRENCHTECH
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Any stored trouble codes?
Jan 4, 2013 at 12:57 AM
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KIMBENOITCONNER
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Nothing other than ABS code.
Jan 4, 2013 at 12:58 AM
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WRENCHTECH
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Then someone is going to have to analyze the sensor data to determine what is going on with the engine. The data can be interpreted by someone that knows what to look for.
Jan 4, 2013 at 1:00 AM
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KIMBENOITCONNER
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OK, thank you for your help.
Jan 4, 2013 at 1:02 AM
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WRENCHTECH
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You're welcome.
Jan 4, 2013 at 1:04 AM
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KIMBENOITCONNER
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We did all of the above without any improvements. What seemed to finally do the trick was changing the distributor shaft. It's running good now.
Jan 19, 2013 at 2:21 PM