SPONSORED LINKS

Runs poorly

Tiny
1FORDMAN
  • MEMBER
  • 2008 FORD F-250
  • 5.4L
  • V8
  • 4WD
  • AUTOMATIC
  • 127,500 MILES
Missing at idle and driving speed. Set no codes.
Tuesday, November 7th, 2017 AT 4:59 PM

3 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,645 POSTS
If there are no codes, then it is not ignition related. Check to make sure the fuel injectors are working/getting power. Also, you may want to disconnect one coil pack at a time to see which one does not make a difference. That way you will know which cylinder is causing the problem. Once that is determined, then check the injector/compression in that cylinder.
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
-1
Tuesday, November 7th, 2017 AT 6:58 PM
Tiny
1FORDMAN
  • MEMBER
  • 2 POSTS
I have disconnect coils does not make difference. Ran compression, the missing is less than five seconds.
Was this
answer
helpful?
Yes
No
Wednesday, November 8th, 2017 AT 6:45 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,282 POSTS
So does the engine have good compression in all cyclins? Here is a guide to help you get the job done.

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

Please run this test and get back to us.

Cheers, Ken

Was this
answer
helpful?
Yes
No
-1
Friday, November 10th, 2017 AT 10:51 AM

Please login or register to post a reply.

Related Engine Runs Rough Content

How to Read Codes
VIDEO
How to Read Codes
Instructional repair video
Check Engine Light
GUIDE
Check Engine Light
Why is my check engine or service engine soon turned on? In this guide we talk about what this is associated with this notorious light, what it is used for and what you...
VIEW MORE

Sponsored links