Odd cylinder 1 Misfire...
Thread Starter
Seasoned Member
Joined: Jun 2011
Posts: 276
Likes: 1
From: Washington
Year: 2000
Model: Cherokee
Engine: 4.0
Just did a Compression test and the results kinda made me upset...
Cylinder 1 = 60, cylinder 2 = 147. Guess I figured out the problem. Now where do I begin?
Cylinder 1 = 60, cylinder 2 = 147. Guess I figured out the problem. Now where do I begin?
Thread Starter
Seasoned Member
Joined: Jun 2011
Posts: 276
Likes: 1
From: Washington
Year: 2000
Model: Cherokee
Engine: 4.0
Im taking my cylinder head off in a couple days and replacing it with a new one. Along with the Exhaust Manifold and Radiator. Manifold has a crack in it and radiator is leaking where the Shi**y plastic crimps onto the metal. Ill keep you guys updated on how and if the new head fixes the problem.
CF Veteran
Joined: Jun 2011
Posts: 1,023
Likes: 1
From: Southern Idaho
Year: 1994
Model: Cherokee
Engine: 4.0 L/242 CID I-6 High Output MFI
Second time i've heard of low compression on cylinder one. Same symptoms, too. Check fire sticky valves and piston rings...
Thread Starter
Seasoned Member
Joined: Jun 2011
Posts: 276
Likes: 1
From: Washington
Year: 2000
Model: Cherokee
Engine: 4.0
Yeah, I like fire tho...
Once I get the head off I am going to check the condition of the cylinder wall and what not. This Jeep has been a pita since I got it two weeks ago. But for some reason I love her, and not giving up yet
Once I get the head off I am going to check the condition of the cylinder wall and what not. This Jeep has been a pita since I got it two weeks ago. But for some reason I love her, and not giving up yet
CF Veteran
Joined: Jun 2011
Posts: 1,958
Likes: 0
From: Norfolk, Va
Year: 1996
Model: Cherokee
Engine: 4.0 ho i6
not to thread jack or anything but once in a blue moon when im idling or rolling foward/reverse my rpms will drop almost to the point were it will stall and then the motor will jerk causing the rpms to go over a 1000 then settle pack to normal and it will do it a couple of time the stop
CF Veteran




Joined: Nov 2010
Posts: 5,840
Likes: 117
From: In the middle of Minnesota!
Year: 1999
Model: Cherokee
Engine: 4.0
Best to perform a "wet" compression test if you have a low cylinder. That means adding a teaspoon of oil to the cylinder and re-doing the compression test. If compression comes UP with that oil in the cylinder, that means the rings are the primary suspect.
CF Veteran
Joined: Jun 2011
Posts: 1,023
Likes: 1
From: Southern Idaho
Year: 1994
Model: Cherokee
Engine: 4.0 L/242 CID I-6 High Output MFI
not to thread jack or anything but once in a blue moon when im idling or rolling foward/reverse my rpms will drop almost to the point were it will stall and then the motor will jerk causing the rpms to go over a 1000 then settle pack to normal and it will do it a couple of time the stop
This sounds like it could be an alternator problem or fuel delivery trouble. Check fuel pump connections and fuel lines. Get a second opinion though.
Rob
CF Veteran
Joined: Jun 2011
Posts: 1,958
Likes: 0
From: Norfolk, Va
Year: 1996
Model: Cherokee
Engine: 4.0 ho i6
Originally Posted by 94JeepCherokeeMan
This sounds like it could be an alternator problem or fuel delivery trouble. Check fuel pump connections and fuel lines. Get a second opinion though.
Rob
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