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I have a severe miss when the engine is cold, what is causing it?

Tiny
ROBERTD55
  • MEMBER
  • 2000 CHEVROLET BLAZER
  • 190,000 MILES
I have a severe miss when the engine is cold, but when it gets to operating temp it runs fine.I was told by Roy it was dirty injector, If so, why would it not miss all the time? Thanks Robert
Friday, September 7th, 2012 AT 2:31 AM

4 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Just answered your other post.

Did anyone look at this yet? Carbon could also be an issue. Throwing parts at it wont solve it till you know the exact failure

Roy
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Friday, September 7th, 2012 AT 2:32 AM
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
One of the most common cause of cold misfire is a failed plug wire. Have them ohmned to see if any is out of specs.
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Friday, September 7th, 2012 AT 2:37 AM
Tiny
ROBERTD55
  • MEMBER
  • 7 POSTS
OK, THANKS
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Friday, September 7th, 2012 AT 2:45 AM
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
Check applicable trouble codes. If a miss on one cylinder, the code should tell you which cylinder. A miss at idle is way more noticeable than at highway speed. A miss at highway speed may just show up as some loss of power.
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Friday, September 14th, 2012 AT 4:49 PM

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