SPONSORED LINKS

00 Jeep Grand Cherokee multiple/random misfire and stalls

Tiny
DANIELWALKER-PETERS
  • MEMBER
  • 2000 JEEP GRAND CHEROKEE
Please help
Got an 00 jeep grand Cherokee 4.7 v8
It is throwing p1756 p0300 and at least 3 diffrent misfire codes for cylinders always different and every cylinder has been pulled
First I noticed really bad exhaust manifold leak causen the H02 sensors reading unmetered air. Extracted the broken bolts
Nothing still doing it
Did compression test getting. 90 - 100 all away around
replaced cam and crank sensors
Still nothing
Any ideas whay it might be
SPONSORED LINKS
Tuesday, October 9th, 2012 AT 8:49 PM

5 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
What about the basics, like plugs and coil?

90-100 is low for that motor.

Vacuum leaks? Injectors? Wiring to injectors?

Roy
Was this
answer
helpful?
Yes
No
Tuesday, October 9th, 2012 AT 8:55 PM
Tiny
DANIELWALKER-PETERS
  • MEMBER
  • 3 POSTS
Plugs replaced about 6 months ago along with coils
no vacuum keaks that I can tell wires for injectors look fine
fuel pressure is with in specs to the manual
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Tuesday, October 9th, 2012 AT 8:59 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Did you have the injectors professionally cleaned? Not an additie but a real direct injection cleaning?

Roy
Was this
answer
helpful?
Yes
No
+1
Wednesday, October 10th, 2012 AT 1:14 AM
Tiny
DANIELWALKER-PETERS
  • MEMBER
  • 3 POSTS
No was going to hook up it tomorrow
also 1x1 ho2 sensor is bouncing from..00 to.8 rapidly would and o2 sensor cause this and not though any codes
Was this
answer
helpful?
Yes
No
Wednesday, October 10th, 2012 AT 1:30 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
It is working normally and will not cause this code.

Roy
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Wednesday, October 10th, 2012 AT 2:44 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