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Rough idle

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Do you have a check engine light?

Try cleaning out the idle air control valve, and check the TPS/MAF/MAP sensors
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Tuesday, June 23rd, 2020 AT 12:45 PM (Merged)
Tiny
BRIAN 1
  • MECHANIC
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Do you know which cylinder or cylinders missfiring?SES light on?Have you switched coils or plugs to see if the missfire on that cyl changes to another cyl. Need more info.02-06 envoy and t-blazer had a very common problem for leaking or stuck intake valve or valves. I've replaced alot of cyl heads on these vehicles. Very very expensive. Perform a cylinder leak down test to determine if this is the problem, which it sounds like.
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Tuesday, June 23rd, 2020 AT 12:45 PM (Merged)

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