4.6 trouble(Miss fire)
10-21-2008, 07:11 AM
#11
Senior Member
eddun 1, use the search button. Have seen a site selling COPS for $125 a set, maybe that was for injectors. Sorry, no experience with COPS as my tiny 4.2 is old school. Good luck.
10-25-2008, 03:11 AM
#13
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Have not changed them yet. I was trying to determine which one.....or ones....are bad. Put an ohm meter on them the other day, but got sporadic readings. Sure hate to have to replace all of them at $65 each, at least that's what the parts store told me they cost. Thanks for the info. ED
Hey There as for the code thing I had the same problem but finly got one saying #4 had a missfire will be changing the plugs out in the morning and installing and other COP.P.s drop me an email and ill get you a guy that sells COP's at a great price....
10-26-2008, 08:54 PM
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My 2001 5.4 also has a missfire after the engine gets hot!
The initial diagnoses had no codes on the scanner. Then mechanic was able to duplicate the problem (after engine was hot) and the scanner showed a misfire on cylinders 5 & 7.
Had the plugs (Autolite Double Platinum) and coil connectors changed. Ran great until after a couple hudred miles and started missing again!
The truck only has 63K miles on it and I believe they're 100K plugs, right?
Sorry I'm old school, COP? Does that mean Coil on Plugs?
Can any one help me?
The initial diagnoses had no codes on the scanner. Then mechanic was able to duplicate the problem (after engine was hot) and the scanner showed a misfire on cylinders 5 & 7.
Had the plugs (Autolite Double Platinum) and coil connectors changed. Ran great until after a couple hudred miles and started missing again!
The truck only has 63K miles on it and I believe they're 100K plugs, right?
Sorry I'm old school, COP? Does that mean Coil on Plugs?
Can any one help me?
10-26-2008, 09:16 PM
#15
OVERTHINKER
Get those Autolites out of there. If you check them I will bet the electrodes are burn out. Triton engines only run on Motorcrafts and for performance NGKs [the Lightning boys recommend changing the NGKs every 20k]. Denso Iridiums are ok in performance apps too.
Last edited by torkum; 10-26-2008 at 09:23 PM.
10-26-2008, 09:28 PM
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What about my 100K spark plug question? is it unusual for the plugs not to last?
Should I be checking the coils too?
10-26-2008, 09:35 PM
#17
OVERTHINKER
When you said the coil connectors, did you mean the boots only? If he only changed the boots you might want to consider the coils also. Remember to fill those boots up with dielectric grease.
10-26-2008, 09:54 PM
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Thanks, I think it is the boots. I hate to admit it but I din't know. The reciept only say's coil connector (SPB102A) at $6.04 apiece. We'll check the coils too if he hasn't already.
10-27-2008, 10:40 PM
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Okay, My mechanic says he did install Motorcraft plugs after I brought the truck back to him. But because he didn't charge me anythig for the 2nd visit I only saw the 1st Autolight receipt.
Is there a reliable way to check the coils for misfire? He says its tough to check them.
Would they cause a misfire after heating up? Engine runs great when cool.
Could there be something else we need to look at?
I'm assuming he installed the boots with grease.
Is there a reliable way to check the coils for misfire? He says its tough to check them.
Would they cause a misfire after heating up? Engine runs great when cool.
Could there be something else we need to look at?
I'm assuming he installed the boots with grease.
10-28-2008, 02:54 AM
#20
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Okay, My mechanic says he did install Motorcraft plugs after I brought the truck back to him. But because he didn't charge me anythig for the 2nd visit I only saw the 1st Autolight receipt.
Is there a reliable way to check the coils for misfire? He says its tough to check them.
Would they cause a misfire after heating up? Engine runs great when cool.
Could there be something else we need to look at?
I'm assuming he installed the boots with grease.
Is there a reliable way to check the coils for misfire? He says its tough to check them.
Would they cause a misfire after heating up? Engine runs great when cool.
Could there be something else we need to look at?
I'm assuming he installed the boots with grease.
Hot News flash.....after 16 plugs and 10 coils later.I found this just by dumb luck.I had my genisus scanner on my truck and it informed me of a missfire on #4 so i replaced soon after i still had a miss and was like what the hell.so with the truck running i unplugged the Coils One at a time to hear and feel a differance in the engine i tested all of them and found that #8 didnt seem to make the engine stumble more.and wiggled the conection(unpluged an plugged in and it seem to fix the problem...so if your unplugging your coils make sure they are secure and plugged back in tight because they may wiggle loose....Hope this help..It sure helped me
TMM
