Very weird misfire - stumped/help please..
CF Veteran
Joined: Jun 2011
Posts: 2,858
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From: Nor-Cal
Year: 1990
Model: Cherokee
Engine: The venerable 4.0
What about the pintles now? Didn't understand that. And plugs were black? Were they blistered or just soot covered? Wet? Oily? Dry?
Last edited by Slick761; Jul 15, 2011 at 10:38 PM.
Thread Starter
CF Veteran
Joined: Jun 2011
Posts: 2,460
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From: Dayton, Ohio
Year: 1992
Model: Comanche
Engine: 4.0
I didn't have the pitiless for my neons.
The stock injector, the tip of it in side the pittle area..the the pitle too was covered in crap, none of them were broken just covered in blackness..like carbon biuld up.
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The stock injector, the tip of it in side the pittle area..the the pitle too was covered in crap, none of them were broken just covered in blackness..like carbon biuld up.
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CF Veteran
Joined: Jun 2011
Posts: 2,858
Likes: 1
From: Nor-Cal
Year: 1990
Model: Cherokee
Engine: The venerable 4.0
Originally Posted by Zacks98
I didn't have the pitiless for my neons.
The stock injector, the tip of it in side the pittle area..the the pitle too was covered in crap, none of them were broken just covered in blackness..like carbon biuld up.
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The stock injector, the tip of it in side the pittle area..the the pitle too was covered in crap, none of them were broken just covered in blackness..like carbon biuld up.
Sent from my Droid using Cherokee Forum
Last edited by Slick761; Jul 15, 2011 at 11:16 PM.
Thread Starter
CF Veteran
Joined: Jun 2011
Posts: 2,460
Likes: 0
From: Dayton, Ohio
Year: 1992
Model: Comanche
Engine: 4.0
And did you inspect the plugs? Hmmm carbon builds up from incomplete combustion and is usually too much fuel or not enough or inconsistent spark. Or low compression. Rings usually wear fairly evenly so I'm leaning back toward a valve or break in head gasket between cylinders..... could be crack in the head or surface imperfection that caused it. Since its two cylinders doing the same thing I guess a compression test is def next. I'm sorry if I'm jumping around a little. I answer two many threads and my head starts spinning. Id like to eliminate easier stuff.before jumping right in to.a head gasket.
I will try the coolant test thing today and see
Thread Starter
CF Veteran
Joined: Jun 2011
Posts: 2,460
Likes: 0
From: Dayton, Ohio
Year: 1992
Model: Comanche
Engine: 4.0
Thread Starter
CF Veteran
Joined: Jun 2011
Posts: 2,460
Likes: 0
From: Dayton, Ohio
Year: 1992
Model: Comanche
Engine: 4.0
Well I did the cp rest thing..whatever its called. (+/- touched for 30 sec, ign on, lights on, lights of, ign off) I figured I havent done after I cleaned a bunch of stuff and got new wires/pugs/etc so I figured what the heck? It couldn't hurt to try it..so well see night/tomorrow if the light comes back on..
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Thread Starter
CF Veteran
Joined: Jun 2011
Posts: 2,460
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From: Dayton, Ohio
Year: 1992
Model: Comanche
Engine: 4.0
Nope, I don't have to stuff to do it with. But knock on wood I think that did the trick..it idles amazing now, it goes threw all of the rpms evenly and feels great, it also doesn't bog down going up hills.
But we'll see how she does tomorrow in the heat of the day.. (high of 95, with 90% humidity)
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But we'll see how she does tomorrow in the heat of the day.. (high of 95, with 90% humidity)
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Thread Starter
CF Veteran
Joined: Jun 2011
Posts: 2,460
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From: Dayton, Ohio
Year: 1992
Model: Comanche
Engine: 4.0
Well...that stupid little light came on..it drives and rides amazing now, well compaired to what it used too be. But hell I can't even feel it missing nor hear it...so we'll see I guess I need to do a compression test huh?
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Thread Starter
CF Veteran
Joined: Jun 2011
Posts: 2,460
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From: Dayton, Ohio
Year: 1992
Model: Comanche
Engine: 4.0
Ha. JUST jumped in little blue, and bamb! The lights gone? And I haven't touched the battery, any ideas?
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Thread Starter
CF Veteran
Joined: Jun 2011
Posts: 2,460
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From: Dayton, Ohio
Year: 1992
Model: Comanche
Engine: 4.0
Well when I was drive to cross country practice this morning it came on like as soon as it warmed up...and now the lights off? Do you think whatever sensor that 'senses' the cyl could be bad?
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