1991 GMC S15 surging problem

Tiny
POTSY
  • 1991 GMC S15

Engine Mechanical problem
1991 GMC S15 V8 Two Wheel Drive Automatic 15000 miles

We replaced the 4.3l with a 5.7l and now we are having a surging problem when I let go of the gas pedal, coming to a stop, it will surge from 2000rpm- 1000rpm. I've had it to a couple of mechanics and they are baffled as well.

Do you
have the same problem?
Yes
No
Monday, March 17th, 2008 AT 2:17 PM

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