01 GMC motor swap no power

Tiny
WELDER6713
  • MEMBER
  • 2001 GMC SIERRA
  • V8
  • 2WD
  • AUTOMATIC
I swap motors now it runs rough and bout 30 when ped on floor what to do
Tuesday, January 4th, 2011 AT 8:42 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,269 POSTS
If you changed year or model engine, chances are there is a sensor issue. Check for major vacuum leaks, check for trouble codes, check timing, also, check the throttle position sensor as well as the mass air flow sensor.
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Monday, January 17th, 2011 AT 3:31 AM

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