SPONSORED LINKS

2007 Chevy Suburban misfire P0300 cylinder 1 and 7

Tiny
GULFGAS181
  • MEMBER
  • 2007 CHEVROLET SUBURBAN
  • V8
  • 4WD
  • AUTOMATIC
  • 93,000 MILES
I have replace plugs and wires, even coil, clean out fuel system swap around injectors, on cylinder #7 and replace coil, still misfire. Replace PCM and crank position sensor, had it flash at the dealer, still misfire check wires and ground to computer did a compression test ok, check for pulse at injectors ok? Can any one help me?
SPONSORED LINKS
Thursday, November 19th, 2009 AT 2:05 PM

2 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,724 POSTS
If you are getting fuel, spark, and it has compression, then the cylender should fire. The only thing I can think of is a bad crank sensor sending spark signal at the wrong time.
Was this
answer
helpful?
Yes
No
Sunday, November 29th, 2009 AT 10:05 PM
Tiny
TYMO
  • MEMBER
  • 1 POST
Gulfgas181 have you resolved your misfire problem. I also have a 07 Sub. Has misfire on cylinder 5. I have replaced all the items you replaced plus the local dealer told me I needed to have the heads reworked that there was a valve problem on left side causing the misfre. After they reworked the heads and complete valve job and $1200 later I still have a misfire on 5. Repost if you have resolved your problem.
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
-2
Monday, May 9th, 2011 AT 2:25 AM

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