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Sputtering

Tiny
PZL0006
  • MEMBER
  • 1991 CHEVROLET SILVERADO
  • V8
  • 2WD
  • AUTOMATIC
  • 150,000 MILES
I have a Chevy pickup with a 5.7 EFI V8 engine. It sputters when I slow down and on occasions will have trouble idling. I have checked for vacuum leaks, bad fuel and changed the fuel filter. Any suggestions?
Wednesday, March 30th, 2011 AT 1:36 AM

3 Replies

Tiny
PROTECH1980
  • MEMBER
  • 901 POSTS
From what your describing sounds like an EGR valve problem, maybe sticking open, could try to take off and clean, another common problem i've seen with that truck is a weak pick up coil in the disributor.
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Wednesday, March 30th, 2011 AT 1:44 AM
Tiny
PZL0006
  • MEMBER
  • 2 POSTS
That was my train of thought as well. I have never had EGR problems before, so what is the best way to clean an EGR valve?
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Wednesday, March 30th, 2011 AT 2:15 AM
Tiny
PROTECH1980
  • MEMBER
  • 901 POSTS
At work I just use some type of Mass air flow/ air intake cleaner and hold the egr upside down and spray the cleaner inside of it and let it soak for awhile, Also when you pull it off, look for any tiny pieces of carbon holding it open, have seen that alot.
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Wednesday, March 30th, 2011 AT 2:34 AM

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