01 gmc motor swap no power

2001 GMC SIERRA
V8 • 2WD • AUTOMATIC
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WELDER6713
  • MEMBER
  • 1 POST
i swap motors now it runs rough and bout 30 when ped on floor what to do
Jan 4, 2011 at 12:42 PM
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JACOBANDNICKOLAS
  • ✓Experienced Mechanic
  • 110,240 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.
Jan 16, 2011 at 7:31 PM
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