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1996 GMC C1500 replaced 305 with 350

Tiny
JIM O
  • MEMBER
  • 1996 GMC C1500
  • V8
  • 4WD
  • AUTOMATIC
  • 202,000 MILES
Replaced original 305 engine with a 1998 350 engine.
Engine runs great, except when maintainibg a highway speed, it misses. It accelerates fine, and it idles fine. However, trying to run at 50-60 mph or any other steady speed, it acts like it has the hiccups. What do I need to do?
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Monday, December 1st, 2008 AT 5:56 AM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,701 POSTS
Hi:
There could be many causes. Therefore, I recommend having the computer scanned for trouble codes. It will limit the cause and point us in the right direction. Let me know what you find.

Joe
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Monday, December 15th, 2008 AT 10:31 AM

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