cylinder #1 misfire 2000 Cherokee XJ
#1
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cylinder #1 misfire 2000 Cherokee XJ
Hey guys, hope you can help me out here I am gonna try and explain the best I can and see what I can get.
I recently changed my head, pistons and head gasket. I got it all back together and now I am showing a cylinder one misfire. I have replaced the injectors with the Dodge caravan injectors. That did not do anything. I noticed that the wire was showing bare wires and swapped the wires. Nothing. I had also changed my spark plugs. Nothing. I changed the cylinder one coil spring and boot or whatever it is called. Nothing happened.
I reset the computer each time I changed something and every time it seems to run ok for a mile or two than the check engine light blinks for about 10 times than is constantly on and the same 0301 code. It will blink if I press the gas to speed up a little.
Also I can really feel it missing if I am at 45 to 55 mph and cruising at that speed.
I think I covered everything. I have not done a compression test yet either. Please let me know if you have any ideas. Thank you the help!
I recently changed my head, pistons and head gasket. I got it all back together and now I am showing a cylinder one misfire. I have replaced the injectors with the Dodge caravan injectors. That did not do anything. I noticed that the wire was showing bare wires and swapped the wires. Nothing. I had also changed my spark plugs. Nothing. I changed the cylinder one coil spring and boot or whatever it is called. Nothing happened.
I reset the computer each time I changed something and every time it seems to run ok for a mile or two than the check engine light blinks for about 10 times than is constantly on and the same 0301 code. It will blink if I press the gas to speed up a little.
Also I can really feel it missing if I am at 45 to 55 mph and cruising at that speed.
I think I covered everything. I have not done a compression test yet either. Please let me know if you have any ideas. Thank you the help!
#2
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Year: 2000
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I had a p0300, multiple random misfire, on a brand x vehicle. Ended up having to replace the coil packs. If the coil pack was bad I would think the paired cylinder would miss fire too though. Aren't these set up as a wasted spark system? Maybe one of the more knowlegeable types will chime in here.
Don't rule out a bad/cracked spark plug. I knew a guy once put new spark plugs in only to have it misfire. Turned out he cracked the porcelain on a new plug. It was some random guy down the road... really!
Rodger
Don't rule out a bad/cracked spark plug. I knew a guy once put new spark plugs in only to have it misfire. Turned out he cracked the porcelain on a new plug. It was some random guy down the road... really!
Rodger
#5
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#8
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Found this looks a little dangerous but it worked.....Video Link: https://www.youtube.com/watch?v=Sk_8TKMwyPo
#9
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Year: 1989 xj sport 2dr
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Engine: 12 hole bosch Injectors
This shows individual cylinders firing best test i can think of . Your issues gonna be its intermittent . Maybe connector to coil rail dirty ?
#11
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Do the compression test first!!
I wasted 6 months and $200 of other "Fixes" before I did the compression test to find out I had a burnt exhaust valve.
No amount of changing plugs, boots, springs, coil packs, valve springs, (yes I tried that too) injectors, or computers will fix a burnt valve.
And just because you just put a rebuilt head on recently is no guarantee that a valve or even piston rings aren't the culprit.
DO THE COMPRESSION TEST!!
I wasted 6 months and $200 of other "Fixes" before I did the compression test to find out I had a burnt exhaust valve.
No amount of changing plugs, boots, springs, coil packs, valve springs, (yes I tried that too) injectors, or computers will fix a burnt valve.
And just because you just put a rebuilt head on recently is no guarantee that a valve or even piston rings aren't the culprit.
DO THE COMPRESSION TEST!!
#12
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Do the compression test first!!
I wasted 6 months and $200 of other "Fixes" before I did the compression test to find out I had a burnt exhaust valve.
No amount of changing plugs, boots, springs, coil packs, valve springs, (yes I tried that too) injectors, or computers will fix a burnt valve.
And just because you just put a rebuilt head on recently is no guarantee that a valve or even piston rings aren't the culprit.
DO THE COMPRESSION TEST!!
I wasted 6 months and $200 of other "Fixes" before I did the compression test to find out I had a burnt exhaust valve.
No amount of changing plugs, boots, springs, coil packs, valve springs, (yes I tried that too) injectors, or computers will fix a burnt valve.
And just because you just put a rebuilt head on recently is no guarantee that a valve or even piston rings aren't the culprit.
DO THE COMPRESSION TEST!!
#14
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Year: 2000
Model: Cherokee
Engine: 4.0