SPONSORED LINKS

Cuts out when AC is on got a misfire code

Tiny
RANDY SHARP
  • MEMBER
  • 2003 FORD FOCUS
  • 65,000 MILES
I have posted this problem a number of times. If I have a misfire in cylinder 2. This is coil on plugs. Can I pull the wire on number 2 you know like you use to be able to do when a cylinder was cutting out pull a spark plug wire to see what cylinder is was. And I would like to know is how you test the injectors to see if it is bad?
SPONSORED LINKS
Saturday, May 18th, 2013 AT 11:42 AM

4 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Yes but first I would remove all the plugs and do a compression test. It is common for the valve seats to fail in these units causing the miss.

Check all plugs for wear as well. The fuel rail needs to be removed to watch the spray pattern of the injectors.

Roy
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Saturday, May 18th, 2013 AT 11:53 AM
Tiny
RANDY SHARP
  • MEMBER
  • 161 POSTS
This focus only has 66,000 on it I am not saying it couldn't happen. What kind of spray pattern should they have
Was this
answer
helpful?
Yes
No
Saturday, May 18th, 2013 AT 12:07 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
A nice coneical pattern there will be one missing or way off if it is the issue

i have seen them at 50k with the valve seat issue

Roy
Was this
answer
helpful?
Yes
No
Saturday, May 18th, 2013 AT 12:28 PM
Tiny
RANDY SHARP
  • MEMBER
  • 161 POSTS
I sure appreciate the advise, but why do you think it only does it when the AC is on?
Was this
answer
helpful?
Yes
No
Saturday, May 18th, 2013 AT 6:32 PM

Please login or register to post a reply.

Related Engine Misfire Content

Intermittent Misfire
VIDEO
Intermittent Misfire
Instructional repair video
Misfire Random Code P0300
GUIDE
Misfire Random Code P0300
The world of automotive diagnostics can be complex, with numerous codes and potential issues to keep track of. One of the more common engine diagnostic codes is P0300, which...
VIEW MORE

Sponsored links