SPONSORED LINKS

Engine misfiring and in limp mode

Tiny
GIB FORREST
  • MEMBER
  • 2005 FORD F-150
  • 5.4L
  • V8
  • 4WD
  • AUTOMATIC
  • 176,000 MILES
I was driving home one day and just started missing and went into limp mode cylinder 3 was the code. I have changed all the plugs and coils and it still misfires in cylinder 3 and 1 I have switched coils and plugs around and it doesn’t follow it it stays on 3 and 1.
SPONSORED LINKS
Monday, February 22nd, 2021 AT 6:04 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,269 POSTS
Hi,

The next thing I would check would be compression and the fuel injector for cyl 3. It may be stuck or not operating. Also, low compression will cause a misfire as well.

Here are a couple of links to help. The first explains how to check an injector.

https://www.2carpros.com/articles/how-to-test-a-fuel-inje

When checking the injector, make sure it is getting a pulse (power) to fire.

Here is a link showing how to check engine compression:

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

_______________________________

Try these things and let me know the results. Also, let me know if you have other questions.

Take care and God Bless.

Joe

SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Tuesday, April 6th, 2021 AT 12:14 PM

Please login or register to post a reply.

Related Engine Computer Limp Mode - Reduced Power Content

Reduced Power - Limp Mode
GUIDE
Reduced Power - Limp Mode
The computer system that controls your car has a built in safety feature called "Reduced Power" or "Limp Mode" which is designed to get the car where it is...
VIEW MORE

Sponsored links