Vehicle stalls out under when slowing down or.

Tiny
ANONYMOUS
  • 1999 GMC JIMMY
  • 125,000 MILES

Vehicle stalls out under when slowing down or stopping usually starts right back up.

Thursday, January 3rd, 2013 AT 11:35 PM

18 Replies

Tiny
WRENCHTECH
  • EXPERT
  • 20,830 POSTS

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.

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Thursday, January 3rd, 2013 AT 11:42 PM
Tiny
RASMATAZ
  • MEMBER

Do you have a check engine light? Might want to disconnect the TCC Solenoid and see what happens-could be sticking-start here

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Thursday, January 3rd, 2013 AT 11:42 PM
Tiny
RASMATAZ
  • MEMBER

Sorry Wrench, didn't see you-I hope you had a wonderful Christmas and New year. I'm good talk later my friend

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Thursday, January 3rd, 2013 AT 11:45 PM
Tiny
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No problem Ras. Happy Holidays to you too.

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Friday, January 4th, 2013 AT 12:02 AM
Tiny
RASMATAZ
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BTW, I've learned that from you on the TCC solenoid at About -7 years ago-Thanks

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Friday, January 4th, 2013 AT 12:07 AM
Tiny
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.

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Friday, January 4th, 2013 AT 12:15 AM
Tiny
RASMATAZ
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I get it, learn something new again-Thanks

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Friday, January 4th, 2013 AT 12:22 AM
Tiny
KIMBENOITCONNER
  • MEMBER

How do you disconnect the TCC solenoid?

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Friday, January 4th, 2013 AT 12:49 AM
Tiny
WRENCHTECH
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You can't

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Friday, January 4th, 2013 AT 12:51 AM
Tiny
KIMBENOITCONNER
  • MEMBER

Oh, ok. Any other thoughts? We tried changing the IAC & it didn't help.

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Friday, January 4th, 2013 AT 12:53 AM
Tiny
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Did you scrub the throttle body as I instructed?

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Friday, January 4th, 2013 AT 12:55 AM
Tiny
KIMBENOITCONNER
  • MEMBER

Yes, had already done that before the IAC. It was very nasty, but didn't improve the problem.

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Friday, January 4th, 2013 AT 12:56 AM
Tiny
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Any stored trouble codes?

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Friday, January 4th, 2013 AT 12:57 AM
Tiny
KIMBENOITCONNER
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Nothing other than ABS code.

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Friday, January 4th, 2013 AT 12:58 AM
Tiny
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.

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Friday, January 4th, 2013 AT 1:00 AM
Tiny
KIMBENOITCONNER
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OK, thank you for your help.

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Friday, January 4th, 2013 AT 1:02 AM
Tiny
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You're welcome.

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Friday, January 4th, 2013 AT 1:04 AM
Tiny
KIMBENOITCONNER
  • MEMBER

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.

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Saturday, January 19th, 2013 AT 2:21 PM

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