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
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Tuesday, October 9th, 2012 AT 8:49 PM

5 Replies

Tiny
ASEMASTER6371
  • EXPERT
What about the basics, like plugs and coil?

90-100 is low for that motor.

Vacuum leaks? Injectors? Wiring to injectors?

Roy
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Tuesday, October 9th, 2012 AT 8:55 PM
Tiny
DANIELWALKER-PETERS
  • MEMBER
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
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Tuesday, October 9th, 2012 AT 8:59 PM
Tiny
ASEMASTER6371
  • EXPERT
Did you have the injectors professionally cleaned? Not an additie but a real direct injection cleaning?

Roy
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Wednesday, October 10th, 2012 AT 1:14 AM
Tiny
DANIELWALKER-PETERS
  • MEMBER
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
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Wednesday, October 10th, 2012 AT 1:30 AM
Tiny
ASEMASTER6371
  • EXPERT
It is working normally and will not cause this code.

Roy
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Wednesday, October 10th, 2012 AT 2:44 AM

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