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After intake gasket replacement when transmission is put into gear engine shuts off

Tiny
JOSH KEYEES
  • MEMBER
  • 1989 CHEVROLET TRUCK
  • 5.7L
  • V8
  • 2WD
  • AUTOMATIC
  • 100,000 MILES
I just had someone change the intake gasket and put it back in time now it shuts off as soon as you put it in gear. I've changed fuel filter fuel pump, blew out all the gas lines, changed MAP sensor, coolant temperature sensor, all the vacuum lines, spark plugs, plug wires, and throttle body. Still does the same thing; starts runs and idles you can even rev it up, but when you put it in gear it shuts off.
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Wednesday, February 13th, 2019 AT 3:54 PM

3 Replies

Tiny
MOTOR MASTER
  • MECHANIC
  • 279 POSTS
Hello my name is Dave.

My first question would be does it have a check engine light with a code for the MAP sensor? If it does it is highly likely that the intake manifold has a vacuum leak. Even if it doesn't I would recommend checking for a vacuum leak. I have added a link to our tutorial on how to find a vacuum leak, I feel this the most likely cause of your issue. However, if it passes the vacuum leak test please let us know and we will be glad to help you further diagnose this problem.

https://www.2carpros.com/articles/how-to-use-an-engine-vacuum-gauge
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Thursday, February 14th, 2019 AT 4:56 AM
Tiny
JOSH KEYEES
  • MEMBER
  • 2 POSTS
The check engine light doesn't work nor does any of the dash lights or speedometer. I've already checked for vacuum leak and replaced MAP sensor.
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Friday, February 15th, 2019 AT 1:42 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,536 POSTS
Can you please shoot a quick video with your phone so we can hear the engine when it stalls? That would be great. You can upload it here with your response.
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Monday, February 18th, 2019 AT 12:19 PM

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