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1992 Jeep Cherokee 92 Cherokee

Tiny
DACR89
  • MEMBER
  • 1992 JEEP CHEROKEE
Engine Mechanical problem
1992 Jeep Cherokee 6 cyl Two Wheel Drive Automatic 228K miles

The #3 isnt getting any fuel, the injector is good(was replaced) the valve isnt sticking and the pushrods are not bent. What else could it be?
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Thursday, October 7th, 2010 AT 1:51 PM

5 Replies

Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
How do you know # 3 injector isn't getting any fuel? Use a noid lite, check for injector pulse.
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Thursday, October 7th, 2010 AT 2:39 PM
Tiny
DACR89
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  • 3 POSTS
Ok I had a miss and pulled the wires one by one. #3 is the only one that showed no change. Replaced all injectors and still no fire on #3. Checked plug and the plug was dry when pulled. Also whats a noid lite and injector pulse?

P.S. I am no mechanic so I do not know alot od the tools and testers.
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Thursday, October 7th, 2010 AT 2:49 PM
Tiny
JDL
  • MECHANIC
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Ok, did you have spark at the plug on number three cylinder? At the injector electrical connector, you need need voltage and ground. If you plug a noid lite into the injector electrical plug, engine cranking, if the lite flashes on and off, you have an injector pulse. Good job on the cylinder balance test, that is how you locate a dead cylinder.
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Thursday, October 7th, 2010 AT 3:28 PM
Tiny
DACR89
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Yes, I had spark. I had a friend go get a noid lite and tested the injector electrical plug and it flashed, any other ideas?
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Thursday, October 7th, 2010 AT 4:13 PM
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
Did it flash all the time during cranking? Is there any compression on number 3 cylinder? I guess I'd have to look at it, I got nothing else.
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Thursday, October 7th, 2010 AT 4:21 PM

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