No acceleration in gear

Tiny
MICHAEL ALLEN2
  • MEMBER
  • 1996 CADILLAC DEVILLE
  • 4.6L
  • V8
  • 150,000 MILES
Fixed vacuum leak on intake at backfire valve, cleaned throttle body. Now boggs down in drive. Replaced the and Maf sensor to no change.
Friday, January 20th, 2017 AT 9:19 AM

1 Reply

Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
I suspect we have an issue with the throttle position sensor. There are a number of things that can cause this but since you cleaned the throttle body, I think you damaged the sensor, and it is now causing this issue.

Here is a guide that will help with this issue in case the position sensor checks out okay:

https://youtu.be/U1RoG3I-Oww

However, based on this info I suspect this is what we are going to find.

I would suggest starting with checking the codes and go from there.

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

See the attached info and that will help with determining if this is a position sensor. We can try and relearn the idle, but I doubt that will solve it so let's run through this and go from there.

Thanks
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Thursday, October 28th, 2021 AT 3:20 PM

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