1989 Chevrolet Silverado runs rough when running

Tiny
BRIAN88FRED
  • MEMBER
  • 1989 CHEVROLET SILVERADO
  • 170,000 MILES
K, I just put an engine in a couple years ago ran fine. About a couple months now. Ive been having trouble with it. As it step on the gas it hesitates. When I let up on the gas lopes like I have a race cam and the oil pressure gauge will drop with it not much tho. I thought it was a IAC sensor so I replaced it. But its not that.
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Wednesday, June 12th, 2013 AT 6:42 PM

3 Replies

Tiny
JACOBANDNICKOLAS
  • EXPERT
Have you checked for vacuum leaks? Not only the hoses but the intake too.
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Wednesday, June 12th, 2013 AT 8:07 PM
Tiny
BRIAN88FRED
  • MEMBER
No, I replaced all the hoses. But havent checked the intake. Ive seen an easy way to check for vac leaks but cant remember Do you know of any?
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Wednesday, June 12th, 2013 AT 9:14 PM
Tiny
JACOBANDNICKOLAS
  • EXPERT
Many people will use carb cleaner and spray it around the intake. If the engine speed picks up, there is a leak. Just be careful that you don't cause a fire.
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Thursday, August 8th, 2013 AT 7:01 PM

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