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Hard start, start it again it acts like old carburetor with choke?

Tiny
BROWN DOG
  • MEMBER
  • 1996 CHEVROLET SILVERADO
  • 5.7L
  • V8
  • 4WD
  • AUTOMATIC
  • 245,000 MILES
First start of the day is normal but driving for a while shutting it off trying to start it again it acts like old carburetor with choke stuck, but tap the throttle it comes out of it, but jumps to 2,000 for about 15-20 seconds. The code says EGR, swapped it out still have same problem.
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Saturday, July 23rd, 2022 AT 12:39 AM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,712 POSTS
Do we have any codes? let's use this guide to check, also it sounds like it might be a vacuum leak at the throttle body base gasket, we should service the throttle body as well. here are some guides to get us started on fixing the problem:

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

And check for a vacuum leak when the engine is cold.

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

And

https://www.2carpros.com/articles/throttle-actuator-service

Please run down these guides and report back.
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Saturday, July 23rd, 2022 AT 10:29 AM

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