#1 Cylinder....Broken Spark plug??
#1
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Year: 1994
Model: Cherokee
Engine: 4.0
#1 Cylinder....Broken Spark plug??
Need everyone's help again. I have a 90 Cherokee 4.0 4x4, thats giving me fits yet again. I have been dealing with a hesitation problem for about a year. I have another thread on this issue, which I need to update. Anyway, about the broken spark plug, this has happen twice. It starts running rough, acting like it was only running on 5 cylinders. Which has happened before, and same result. #1 spark plug broken. Hopefully the pic will load and see what Im looking at. Any advise would be great, and if you had the same problem, what fixed it?
#2
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That's bizarre! I've seen it before but it was just due to old plugs, not sure why you've had it happen twice. Are they the correct heat range for an XJ?
#3
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Year: 1996
Model: Cherokee
Engine: 4.0
That is an interesting issue, only thing I could think of that is repeatable would be a heat issue, or the wrong plug. Just out of curiosity the wire is in good shape? Those pieces of the insulator probably aren't good in there though. It is the same plug as the other cylinders and installed at the same time?
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Year: 1994
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That is an interesting issue, only thing I could think of that is repeatable would be a heat issue, or the wrong plug. Just out of curiosity the wire is in good shape? Those pieces of the insulator probably aren't good in there though. It is the same plug as the other cylinders and installed at the same time?
#5
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You aren't burning any oil by chance?
And is the dist/cap set properly?
I had this issue on an old F150 5.8L that would crack the insulation. Timing was not set properly. It would advance and run super lean.
And is the dist/cap set properly?
I had this issue on an old F150 5.8L that would crack the insulation. Timing was not set properly. It would advance and run super lean.
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Year: 1996
Model: Cherokee
Engine: 4.0
Through the wonders of google I give you this
So you don't have to click: it suggests severe detonation, torqued down too hard or with the wrong tool, and incorrect gap settings.
The plugs you bought are pregapped correct, so probably not the issue. Torque/tool shouldn't be an issue unless you were having issues getting it in. I would lean towards the detonation, and the posts above seem to suggest that as well.
So you don't have to click: it suggests severe detonation, torqued down too hard or with the wrong tool, and incorrect gap settings.
The plugs you bought are pregapped correct, so probably not the issue. Torque/tool shouldn't be an issue unless you were having issues getting it in. I would lean towards the detonation, and the posts above seem to suggest that as well.
#7
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Year: Several
Model: Cherokee
Engine: 4.0
Show us a pict of the other side of the insulator. It looks "too clean" like it has a vacuum leak, making it run too hot.
Do a smoke test.
Is that the plug called out on the underhood label? Not the forum, not the parts druggie - the ones called out on the LABEL?
Do a smoke test.
Is that the plug called out on the underhood label? Not the forum, not the parts druggie - the ones called out on the LABEL?
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#9
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Year: 1994
Model: Cherokee
Engine: 4.0
Through the wonders of google I give you this
So you don't have to click: it suggests severe detonation, torqued down too hard or with the wrong tool, and incorrect gap settings.
The plugs you bought are pregapped correct, so probably not the issue. Torque/tool shouldn't be an issue unless you were having issues getting it in. I would lean towards the detonation, and the posts above seem to suggest that as well.
So you don't have to click: it suggests severe detonation, torqued down too hard or with the wrong tool, and incorrect gap settings.
The plugs you bought are pregapped correct, so probably not the issue. Torque/tool shouldn't be an issue unless you were having issues getting it in. I would lean towards the detonation, and the posts above seem to suggest that as well.
They are champions.
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Year: 1999
Model: Cherokee
Engine: 4.0L OBD-II
Originally Posted by BigzXJ
Left the plug at home, will take a pic tonight. The plugs have less then 5000 miles on them. If I remember right. Everyone has told me the the champion coppers works best in the renix. But I do have an H.O. engine.
They are champions.
They are champions.
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Year: Several
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You know what DOESN'T WORK. Now try what does!
Even if everyone else says different -
'everyone' did not design YOUR ENGINE.
If the label says NGK or grandma's molasses cookies - use it! Use the exact number and gap.
PREGAPPED PLUGS - always check them, 15% are gapped wrong.
Would you trust a pre-aimed bullet right out of the box to shoot a straw out of your mouth?
Even if everyone else says different -
'everyone' did not design YOUR ENGINE.
If the label says NGK or grandma's molasses cookies - use it! Use the exact number and gap.
PREGAPPED PLUGS - always check them, 15% are gapped wrong.
Would you trust a pre-aimed bullet right out of the box to shoot a straw out of your mouth?
#13
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Year: 1994
Model: Cherokee
Engine: 4.0
You know what DOESN'T WORK. Now try what does!
Even if everyone else says different -
'everyone' did not design YOUR ENGINE.
If the label says NGK or grandma's molasses cookies - use it! Use the exact number and gap.
PREGAPPED PLUGS - always check them, 15% are gapped wrong.
Would you trust a pre-aimed bullet right out of the box to shoot a straw out of your mouth?
Even if everyone else says different -
'everyone' did not design YOUR ENGINE.
If the label says NGK or grandma's molasses cookies - use it! Use the exact number and gap.
PREGAPPED PLUGS - always check them, 15% are gapped wrong.
Would you trust a pre-aimed bullet right out of the box to shoot a straw out of your mouth?
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Year: Several
Model: Cherokee
Engine: 4.0
"""""so far are the best I have used in the past. Just have the #1 cylinder problem."""""
LOL! I guess if you feel 5 out of 6 isn't bad, why did you complain here?
LOL! I guess if you feel 5 out of 6 isn't bad, why did you complain here?
#15
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Year: 1993
Model: Cherokee
Engine: 4.0 high output straight 6
hows your fuel filter? been switched lately? tested fuel pressure at the rail?
that is usually what causes the engine to run lean unless maybe you have a bad intake gasket around the number 1 cylinder?
Definently looks like damage from the engine pinging.
that is usually what causes the engine to run lean unless maybe you have a bad intake gasket around the number 1 cylinder?
Definently looks like damage from the engine pinging.