5.4 Cop Problem#8 Cyl.

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Dec 27, 2003 | 11:48 PM

MAINTAINER

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From: CANTON,TEXAS

5.4 Cop Problem#8 Cyl.

ABOUT 3DAYS AGO MY F150 TOOK A SPELL OF MISSING ,I FOUND OUT BY A FRIEND WHO HAS A HAND HELD CODE READER THAT THE #8 CYL HAD A CODE PO358 IGNITION COIL CIRCUIT FAULT.I BOUGHT A NEW MOTORCRAFT COIL FOR IT . IT RAN FOR ABOUT 45MIN THEN FAILED.I TOOK IT BACK AND GOT A NOTHER ONE .THIS TIME THE COIL SMOKED AND BLEW THE FUSE TO THE PCM. I THEN TOOK THE COIL FROM # 6 CYL AND PUT IT ON #8 STARTED THE ENGINE ,THAT COIL SMOKED AND BLEW THE FUSE.I HAVE NO WATER LEAKS WHAT SO EVER ON THE TOP OR ON THE BOTTOM (I.E. HEADGASKET) I DON'T KNOW IF THERE IS A DIODE SOME WHERE IN THE LINE OR IN THE PCM IT SELF. ALOS I REPLACED THE SPARK PLUG AFTER IT SMOKED THE 2nd COIL .
SO FAR COUNTING THE FIRST ONE IT HAS SMOKED 4 COIL. IF ANYONE HAS ANY IDEAS OR HAS KNOWN ANYONE WHO HAS DELT WITH A PROBLEM LIKE THIS PLEASE LET ME KNOW I AM AT MY WICKS END THANKS! MAINTAINER

Dec 29, 2003 | 07:08 PM

Blly177

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From: CT

something is probrally grounded out

Dec 30, 2003 | 02:02 PM

LxMan1

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From: Louisville,Ky.

Did you change the plug? maybe it's bad.
Jimmy

Jan 4, 2004 | 10:34 PM

99f350sd

Lead Driver

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From: Lyndonville, Vermont

You must have a bad pcm cause the output transistor is sending out too much voltage to fire the coil. most likely. You did pull the plug and look right?