#4 COP "wiggly"
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5th Wheeling
Joined: May 2006
Posts: 36
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From: Texas
#4 COP "wiggly"
I have an '02 F150, 5.4, and a couple weeks back my SES light came on, truck is struggling like crazy. Took it to AutoZone, their tester said #3 was bad. About a year & a half ago it was doing the same thing, when I got it checked at AZ, the code read #6, but before I could replace anything, the light went out & it started running right. This time, I got up under the hood to take a look (never done this kinda thing before) and all the COP units were seated nice & tight except #4, it's almost like it's not touching the plug.
My question is, should it wiggle like that? And could the #4 being loose cause an incorrect code to come up?
My question is, should it wiggle like that? And could the #4 being loose cause an incorrect code to come up?
Hotshot
Joined: Jul 2005
Posts: 11,931
Likes: 180
there should be a small screw on the side of the COP holding it down to the manifold. look for a small 6 sided screw head, about 7 MM. If the bolt is missing, the COP will be loose. If the bolt is loose, try to tighten. IT screws into aluminum threads so dont go real tight. IF #4 is loose, it could give a bad code, but it should read #4, not #3.
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5th Wheeling
Joined: May 2006
Posts: 36
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From: Texas
Thanks for the response Steve. I didn't really think it should be loose, but since I've never done this before... Anyway, I took the #4 out, the end of the boot was discolored, the bolt was missing, and the tab the bolt goes through was broken off. I guess you get what you pay for when you have someone else do the work. I'm going to check the Ford dealership tomorrow, the two parts stores I checked didn't have anything comparable, and I didn't want to try something else and mess up the threads. A girl can't be too careful, ya know, lol! I'm going to replace that one, see what happens, and go from there.
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5th Wheeling
Joined: May 2006
Posts: 36
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From: Texas
SES light back on, I knew I couldn't get lucky! I'm taking it back over to AutoZone to get the code reader on it again. Anyone want to bet on what it says? I guess I really should invest in plugs and COP's for all 8 cylinders, but I just don't have the time or cash to do it. Time to get one of those funny banks...Mom's Mad Money, or whatever, and start putting back the bucks.
Hotshot
Joined: Jul 2005
Posts: 11,931
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it dont hurt to have all 8 COPS, but one can fail and the others be fine for years. get the code and narrow it down to 1 cylinder. --- your radiator tank has not dropped any level right? your not using antifreeze ?
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5th Wheeling
Joined: May 2006
Posts: 36
Likes: 0
From: Texas
Thanks Steve. Radiator level is fine. I took it back to AutoZone where they did their thing with the code reader, came up #6 and the camshaft position sensor. Changed out the #6 this morning, now I'm fighting with the anti-theft crap when I try to reconnect the battery. I posted a question about how to deal with that, I got lucky on the #4 when I reconnected, but I don't know which combination of key turns, etc. worked.
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