the car shuts off when slowing down

2005 DODGE NEON
150,000 MILES • 4 CYL • 2WD • AUTOMATIC
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B_TRACEY
  • MEMBER
  • 1 POST
I have had some extensive work done to this car. New heads, thermostat, alternator and now the car shuts off when slowing down. Put it in park and start it right back up . Not sure what this issue is.
Jul 27, 2020 at 9:33 AM
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JACOBANDNICKOLAS
  • ✓ASE Certified Mechanic
  • 110,194 POSTS
  • ASE Certified Mechanic
Hi,

Does it only happen with your foot off the throttle? If so, have you checked for engine vacuum leaks that can cause this type of an issue? Here is a link that shows how:

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

Also, is the check engine light staying on when the engine is running? This also could be related to the idle air control valve. (IAC) The IAC is responsible for maintaining engine idle speed. Here is a link that explains how to service one:

https://www.2carpros.com/articles/idle-air-control-valve-service

Let me know if that helps or if the check engine light is staying on with the engine running. I've attached a pic below showing the IAC location.

Take care,
Joe
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Jul 27, 2020 at 7:52 PM
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