5.4 spitting out plugs..... - Diesel Forum

DshiftFF · 05-24-2003, 02:42 PM

My boss has me go out to look at his van on his lot, 5.4 V8 98 E350. says he was driving it, made a loud pop and lost power but still ran. I was figuring something exhaust related, but upon inspection, found the individual coil all self destructed, snapping the mounting flange off, boot that goes into plug hole shredded and no sign of spark plug. It may be down in the hole still, but its of course the #7 which is a bastard to get at. also pulled codes and got PO300 PO307 PO357 and PO402 which are cylynder misfire related. anyone ever see this with a V8? What was your recourse for fixing this big bucks or what? any help appreciated. thanks....

V10 man · 05-25-2003, 01:43 AM

It's more common than you think. This might fix it. http://www.timesert.com/bigsert.html If not then you'll have to pull the head.... $$$

ChrisB · 05-25-2003, 03:39 AM

I may be missing something but here goes. I have not worked on that engine or even seen one, but have heard of this happening.

Are the threads still in the plug hole and are they OK? It sounds to me like that plug, which has probably been changed at least once by now, was not properly seated and worked its way loose. It blew out of there explosively and somehow hit the coil you speak of either directly of after having bounced off something else. I would guess the plug is out on the road somewhere. The plug wire whipping out when the plug boot was shredded, may have damaged the coil as well.

DshiftFF · 05-25-2003, 10:55 AM

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If not then you'll have to pull the head.... $$$

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hope not for his sake$$$
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Are the threads still in the plug hole and are they OK?

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unfortunetly the hole for the plug is directly under the dash (E250) so we could not see down there. The plug was gone so couldnt check the threads on that either..hes gonna have it go in for service so we will see whats up by tues....

dadomin8r · 05-27-2003, 10:14 AM

$10 says it is the #3 cylinder. Very common!

keithf · 05-27-2003, 10:44 PM

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$10 says it is the #3 cylinder. Very common!

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Um, he said it was #7 in an earlier post. Feel free to send the $10 my way.... [img]/ubbthreads/images/graemlins/grin.gif[/img]

DshiftFF · 05-28-2003, 08:38 PM

turns out that it just vibrated out, local mech. replaced the plug and it took to the threads also needed new coil. boss sure was happy about that.... ford stealer said $3800 if they needed to pull the motor [img]/ubbthreads/images/graemlins/eek.gif[/img] [img]/ubbthreads/images/graemlins/eek.gif[/img] [img]/ubbthreads/images/graemlins/eek.gif[/img]

V10 man · 05-28-2003, 09:03 PM

Run out and buy lottery tickets right now! You're lucky. [img]/ubbthreads/images/graemlins/biggrin.gif[/img]