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Not starting after having been parked for two weeks?

Tiny
SIRBOG
  • MEMBER
  • 1999 CADILLAC DEVILLE
  • 4.6L
  • V8
  • 2WD
  • AUTOMATIC
  • 201,000 MILES
My vehicle was running fine, it was parked for about two weeks, and it became very hard to start afterwards. I thought maybe it was just low on fuel, so I filled it up with premium and now it won’t run. It’ll start if I hold down the gas pedal but if I take my foot off it falls dead. I cleaned the throttle body and the idle air control valve but it was still the same issue. Any ideas?
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Saturday, September 17th, 2022 AT 2:33 PM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,643 POSTS
It sounds like you have a vacuum leak, or the IAC motor is not working, also do you have a check engine light on? Here are two guides to help fix the problem and the location of the IAC motor in the images below so you can check it out. Check for vacuum leaks when the engine is cold.

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

and

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

Also do you have a check engine light on?

If so, check out this guide:

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

Check out the images (below). Please let us know what you find. We are interested to see what it is.
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Monday, September 19th, 2022 AT 9:38 AM

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