Engine shuts off when it reaches operating temperature

1995 SAAB 900
182,000 MILES • 2.0L • 4 CYL • 2WD • MANUAL
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RAY SYMONS
  • MEMBER
  • 2 POSTS
When car gets to operating temperature when you take your foot off the accelerator the revs will drop off to a point where it will stall. I have replaced Idle sensor, throttle control valve, fuel pump fuel and vacuum hoses. where do I look next?

Once it gets to operating temperature it starts hunting while I am parked.
Feb 21, 2018 at 12:12 PM
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STRAILER
  • ✓Experienced Mechanic
  • 55,542 POSTS
Hello,

This sounds like a TPS sensor has gone out is the car OBD2?

This guide can help.

https://www.2carpros.com/articles/stall-at-idle

Please let us know.

Cheers, Ken
Feb 24, 2018 at 3:28 AM
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RAY SYMONS
  • MEMBER
  • 2 POSTS
The TPS The throttle body valve vacuum hoses fuel pump have all been replaced. starts hunting once it gets to operating temperature. then the more you drive it the worse it gets.
Feb 24, 2018 at 12:04 PM
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STRAILER
  • ✓Experienced Mechanic
  • 55,542 POSTS
This sounds like a vacuum leak making the idle fluctuate can you please follow this guide to see what you find.

https://www.2carpros.com/articles/how-to-use-an-engine-vacuum-gauge

Please run down this guide and report back

Cheers, Ken
Feb 26, 2018 at 3:34 AM
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