coil codes

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May 10, 2010 | 12:37 PM

scout63

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From: texas

coil codes

Have a problem with truck throwing bad coil codes and mis-fires. Friday started running rough-CEL came on, figured another coil gone bad, used my OBD II scanner and found #2 coil out. Put new one on, ran fine about 10 min. and did it all over again. I got fed up and replaced every coil Sat. and now it runs rougher and is throwing codes for #2 and #7 coil. my truck is a '06 f250 4x4 w/5.4 and a flowmaster is only mod. It has 103.000 miles on it ,new plugs put in at 99,000 mls. change oil,air,& fuel filters regulary . Talked to Ford service guy ,he said " clear codes (I did),reset computer (I did) and may have to reset cam timing (did not do). Had a coil go out last year and replaced without a problem. Any thoughts would greatly be appreciated.

May 11, 2010 | 02:05 AM

redford

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From: Stephensville WI

What plugs did you use?

Also, did you replace the boots?

May 11, 2010 | 06:54 AM

scout63

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From: texas

plugs are bosche double plat. and brand new boots. truck at shop now and looks like crank pulley is starting to seperate at the rubber ring.

May 11, 2010 | 10:22 AM

KhanTyranitar

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There is likely your problem. Lots of people report problems using Bosch in Fords. Use Motorcraft or Autolite Double Platinums only.

May 11, 2010 | 10:36 AM

TennesseeMustangPerf

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X2 on the Motorcraft plugs. They are the only ones that I use. Coils do tend to go out from time to time, especially after 100K or so... this seems to be the general age for coils.

May 11, 2010 | 12:28 PM

scout63

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From: texas

shop just contacted me and said the coiled wire in the boots on the #7 plug was twisted and not making good contact. said they replaced boot , cleared codes and drove it a mile, everything seemed fine. I said good , now please drive it at least 10 miles and see what happens , because thats when things went wrong after replacing the # 2 coil. waiting to hear back.

May 11, 2010 | 01:27 PM

scout63

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From: texas

o.k. apparently two of the springs in two of the boots got twisted in my haste to put them on to get my daughter moved. shop did a 30 mile test drive without a hitch and ready for pick up. and yes i feel like an *** for this blunder. i love this truck and it appears that if i take care of it, it may last awhile, (with the prices of brand new ones), i need it too. thanks for the input .