Rough Idle

134,000 MILES • 4.0L • V6 • 4WD • AUTOMATIC
Avatar
CHARLES MURRAY
  • MEMBER
  • 1 POST
just over the past two weeks I have notice the car was idling rough. It starts and runs great. there are no dashboard lights on. I brought it to mechanic they did a tune up (plugs and wires) no change. then they did fuel control tune up and still no change. they said the next step would be new injectors, but it is not guaranteed. is there anything else I can try before such a large investment?
Aug 7, 2017 at 4:07 AM
Advertisement
Avatar
STRAILER
  • ✓Experienced Mechanic
  • 55,694 POSTS
Hello,

Yes I would stop and do a compression test before installing any more parts. Here is a guide to help you get the job done.

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

If you need a gauge you can rent one for free from an auto parts store.

Please run this test and get back to us we are interested to see what it is.

Cheers, Ken


Aug 9, 2017 at 4:47 AM
Add a reply
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.

Frequently Asked Problems for This Vehicle