• Tiny
  • smitty36lance
  • 1997 GMC

Engine Performance problem
1997 Other GMC Models V8 Four Wheel Drive Automatic 215, 77 miles

I just put a rebuilt 355 GMC in my suburban. It boggs, then surges with power all at once. Then it dies, restarting good, then after a matter of minutes, dies again. Can you help me? New fuel pump, distributor, pick-up coil inside distributor, rotor, i've replaced everything. FRUSTRATED!

Monday, July 20th, 2009 AT 9:58 AM

1 Answer

  • Tiny
  • hmac300
  • Expert
  • 42,102 posts

Try cleaning the throttle body plate. This is the cause of alot of problems on cases like yours. Spray some choke cleaner on itndwipe with a rag on both sides. Ifit is a TBI unit then start the vehicle up and clean it while idling, it will tend to stall out so make sure to do it slowly. Then if it also is a TBI, check te vacuum hose to teh map sensor and see if it is soft or collapsed. If it is replace it.

Was this
Monday, January 11th, 2010 AT 5:42 PM

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