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Tried new plugs, oil change and new catalytic converter

Tiny
SUTHERS89
  • MEMBER
  • 1992 CHEVROLET SUBURBAN
  • 177,000 MILES
I replace my catalytic converter on my 1992 chevrolet suburban 2500 V8. However I still have a terrible shaking upon acceleration. I also hear a sound that sounds like a exaust leak but I cannot find it. What could be the problem
Monday, October 17th, 2011 AT 8:47 PM

3 Replies

Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
New plugs is only part of a tune-up. How long since overall tune-up? Any applicable trouble codes? Use a gauge and check fuel pressure. What about motor mounts and suspension/steering?
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Monday, October 17th, 2011 AT 8:59 PM
Tiny
SUTHERS89
  • MEMBER
  • 2 POSTS
It has been a while since a full tune up. Motor mounts are good steering is good.
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Monday, October 17th, 2011 AT 9:03 PM
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
Any applicable trouble codes? You should be able to check those, yourself. Some of the national brand autostores used to loan out a fuel pressure. You may to put up a depost for the gage, but, you get it back when the gage is returned.
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Monday, October 17th, 2011 AT 10:47 PM

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