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Engine will not idle

Tiny
MICHELLE LENOIR
  • MEMBER
  • 1996 SATURN SL2
  • 1.9L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 238,000 MILES
Engine will start but will not idle. It runs good at high rpm's.
Tuesday, October 24th, 2017 AT 7:00 PM

5 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,755 POSTS
Check the following; make sure there are no engine vacuum leaks. Also, check the idle air control (IAC) for proper operation and make sure there it is clean. Make sure the throttle body is clean and not slugged. Finally, with that many miles, keep in mind engine compression could be an issue. If there is more than a ten percent variation between cylinders, you could get a rough idle. However, since it will not idle, chances are it is one of the items I mentioned.
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Wednesday, October 25th, 2017 AT 6:51 PM
Tiny
MICHELLE LENOIR
  • MEMBER
  • 3 POSTS
So it was the the throttle position sensor. It's finally running now but smokes really bad.
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Saturday, November 4th, 2017 AT 4:13 PM
Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
Just to add to this one what color is the smoke out the tail pipe?Also has the coolant temp sensor been changed?They go bad and can cause smoke issues starting and idle issues.
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Sunday, November 5th, 2017 AT 10:14 PM
Tiny
MICHELLE LENOIR
  • MEMBER
  • 3 POSTS
Black smoke and yes the temperature control sensor has been changed.
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Monday, November 6th, 2017 AT 1:29 AM
Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
So you also replaced the throttle position sensor?Also have you scanned the computer for codes?
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Monday, November 6th, 2017 AT 1:39 AM

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