SPONSORED LINKS

Rough idle and misfire

Tiny
JASON POND
  • MEMBER
  • 2004 MITSUBISHI ENDEAVOR
  • 3.8L
  • 6 CYL
  • AWD
  • AUTOMATIC
  • 175,000 MILES
When my car warms up it has a rough idle and misfire. Check engine light does not come on. The misfire is worse when A/C is on. I can drive to work witch is about four miles car runs fine by the time I pull in the parking lot it has a rough idle and misfires. I have changed the plugs and check for vacuum leaks. Please help, thanks.
SPONSORED LINKS
Thursday, August 24th, 2017 AT 9:10 PM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,526 POSTS
It sounds like you have low compression in one or more cylinders. Lets start with a compression test.

Here is a guide that will help you get the job done:

https://www.2carpros.com/articles/how-to-test-engine-compression

If you do not have a gauge you can rent one for free from the local auto parts store.

Please let us know what you find.

Cheers, Ken
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Friday, August 25th, 2017 AT 1:14 PM

Please login or register to post a reply.

Related Engine Idle Rough Content

Rough Engine Idle
GUIDE
Rough Engine Idle
A rough engine idle condition is a common issue that many drivers face often indicating underlying problems within the engine, fuel or ignition system. We have created this...
VIEW MORE

Sponsored links