#2 and #4 misfire.
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Elder User
Joined: Nov 2007
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From: Michigan
#2 and #4 misfire.
Service Engine Soon light recently came on and noticed the truck was vibrating real bad when accelerating. It is fine at an idle or at a constant speed but upon accelerating, my truck turns into a 5000 pound massage chair. Notice it the most at about 12-1300 rpm. Ran the codes at Autozone and they come up with #2 and #4 misfire. I knew about a misfire not the numbers. I suspected coils. How do I check the coils on these cylinders? I tried to pull the wire clip going to it to see if there would be a change and I couldn't pull it off. I don't have any special equipment so I thought this would be the best way. 
Any suggestions?
Kinda have to get this done ASAP because I need to get back to school which is a two and a half hour drive.
Any suggestions?Kinda have to get this done ASAP because I need to get back to school which is a two and a half hour drive.
Posting Guru
Joined: Dec 2006
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From: N. Fort Myers,FL
Service Engine Soon light recently came on and noticed the truck was vibrating real bad when accelerating. It is fine at an idle or at a constant speed but upon accelerating, my truck turns into a 5000 pound massage chair. Notice it the most at about 12-1300 rpm. Ran the codes at Autozone and they come up with #2 and #4 misfire. I knew about a misfire not the numbers. I suspected coils. How do I check the coils on these cylinders? I tried to pull the wire clip going to it to see if there would be a change and I couldn't pull it off. I don't have any special equipment so I thought this would be the best way. Any suggestions?
Kinda have to get this done ASAP because I need to get back to school which is a two and a half hour drive.
Any suggestions?Kinda have to get this done ASAP because I need to get back to school which is a two and a half hour drive.
For your other question, whenever you replace the coil, disconnect the battery so that when you are done the computer will reset.
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Elder User
Joined: Nov 2007
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From: Michigan
I can get the wires off easy now. I just purchased 2 new ones, not too happy about the price. Now just getting back to the 4th one's going to be a total pain. Thanks for the replies. I'll check for a coolant leak.
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Elder User
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From: Michigan
Well it's been a while since I've been school is a busy place. But I got the new coils in. Took about a half hour without pulling the fuel rail to get to the #4 cylinder. It was a total pain getting back there but it definitely beats having to deal with taking the fuel rail out. Didn't see any evidence of a coolant leak. Took it for a test drive around the block, no service engine light and it runs great. Drove it for 200 miles straight, no service engine light so I'm pretty sure it's fixed.
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yes when the truck feels like it is going to shake apart it is a bad cop. hope ya didnt go to ford for a new one.
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Thread Starter
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Elder User
Joined: Nov 2007
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From: Michigan
No I didn't go to Ford for a new one, I don't remember the last time I went there for a replacement part. I picked up Duralast brand cops from Autozone, I remember reading on here to not buy them from autozone but it was last resort. I'm not a fan of Autozone because when I went to get a Pittman Arm Puller I looked and said this isn't big enough, are you sure this is a Pittman Arm Puller? They said yes, turns out it was a tie rod end puller so now i'm hesitant about buying anything from the place. Normally I would go to Napa but it was a Sunday and they weren't open. Paid about 48 bucks a piece for them, couldn't imagine replacing all of them and plugs at the same time, pretty effin' expensive.
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Elder User
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From: Michigan
I couldn't see any physically, granted it is difficult to see down the #4 spark plug cavity. I did take a small shop vac however and stuck it over both holes hoping to suck up any moisture or dirt that could be in there.
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I would check the plugs to I mean how many miles r on the truck cause i replaced my plugs last year and have replaced 2 coils so far. I was suprised at how much dirt and grease was down in each one of the spark plug holes.
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Elder User
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From: Michigan
I replaced the plugs about a year and half two years ago or so. I'm not too sure. I was surprised by all the gunk around the cops, I was scared it was going to all fall down in there so I took a vacuum to the area when I took them out.