Miss fire?
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New User
Joined: Aug 2003
Posts: 3
Likes: 0
Miss fire?
Hey guys,
Great forum. Got one for all who will listen.
2000 explorer 4L ohv. 100,000 plus
small miss. replaced the plugs and wires with oem. noticed plugs on pass side (123) in really good condition for 100K.
ran good for a few hours. after a long drive. started running real rough. check engine flashed/solid/off/on...
put timing light on all wires to look for miss.
most cylinders are missing at some point. 1 2 & 3 are flashing at about half the speed of 4 5 6?!?!?
replaced coil pack with oem no improvement. I am lost. I need help.
Any help is much appriciated
Great forum. Got one for all who will listen.
2000 explorer 4L ohv. 100,000 plus
small miss. replaced the plugs and wires with oem. noticed plugs on pass side (123) in really good condition for 100K.
ran good for a few hours. after a long drive. started running real rough. check engine flashed/solid/off/on...
put timing light on all wires to look for miss.
most cylinders are missing at some point. 1 2 & 3 are flashing at about half the speed of 4 5 6?!?!?
replaced coil pack with oem no improvement. I am lost. I need help.
Any help is much appriciated
Hotshot
Joined: Aug 2002
Posts: 12,679
Likes: 15
From: BC, Canada
Miss fire?
Hi xls and welcome aboard 
I would start with getting the system scanned for trouble codes. After the check engine light has been on there will be a code or codes stored that should lead you in the right direction.
I would start with getting the system scanned for trouble codes. After the check engine light has been on there will be a code or codes stored that should lead you in the right direction.
Junior User
Joined: Aug 2003
Posts: 53
Likes: 0
From: Monterey
Miss fire?
Check out the routing of your plug wires for the #1,2, and 3 cylinders and make sure they are seated correctly. I have a 97 Explorer AWD V8 which I just bought at 100K miles. The plug wires for #1 and #3 cylinders were melted against the exhaust manifold so I replaced the entire set. I started it up and experienced something similar to what you are encountering and 2 of the plug wires were not seated correctly...pushed them in a bit until they clicked...fixed the miss problem.
Thread Starter
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New User
Joined: Aug 2003
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Miss fire?
Unfortunatly I didn't find it. Didn't even think of it. How could "I" break a plug?
Local shop found it for 50.00, definatly worth it. they get my business!
Local shop found it for 50.00, definatly worth it. they get my business!
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New User
Joined: Aug 2003
Posts: 14
Likes: 0
Miss fire?
Yeah, I just had the same problem, but with the #4 cylinder, and it happened twice,first time was a cracked plug, the other time I am not so sure, it came up as "miss on #4" and I changed the plug , cleard the code and it is doing ok now,I wonder why it did it twice in a row?
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