F150 Screw trouble code

[Jake Levin]

Hey guys, my buddy, f150guy, got a p305, misfire cylinder 5 code this morning. We went looking under the hood and it appears it's a dstributer-less firing system. I believe it's the 3rd cylinder back on the passenger side but am not sure. Can anyone shed some light on this for me? Thanks in advance!

 

[EddieS'04]

Posible bad sparkplug or wire. That where I would start..

 

[Tom Schindler]

Bad plug, coil, or boot. (or whatever it is called)



Replace the simple part first. Spark plug. If that does not cure it, replace the boot. Still no fix, the coil is bad.



I would put money on it that it is the plug.





Tom

 

[Todd Z]

Also don't rule out the fuel system.... Try a fuel filter change and some injector cleaner as well...



Todd Z

 

[Steve M 2]

thanks for the advice... I feel a cold coming on... maybe I'll have to stay home tomorrow (where I could try these ideas out!) cough...cough...



it's an '03 5.4l at 80k miles.... I'd be willing to bet when I pull the plug, I'll find extensive fouling.



I'll post results...





Thanks again!



...Steve...

 

[2]

Steve- check out F150online.com, tons of F150 information.

 

[Jake Levin]

Olaf, he was posting on there too. I posted on here b\c we have such a great community of very knowledgeable people. I figured someone here would know something and I was right!

 

[2]

Covering all your bases, no prob, just letting him know in case he wasn't aware of it.

 

[Jake Levin]

yeah, on f150online he found a link to a ford forum on topix.net. Turns out there is a known issue with the triton 5.4l engine from 97-03 (his is an 03). The blow spark plugs resulting in upwards of 5K to repair. Heading over to the ford dealer up the road on lunch to look at it. He has all of the symptoms listed and an extended warranty...

 

[Jake Levin]

Ford admits spark plug problem: Ford’s Special Service Message 19228, article 15815, & article 18310,

(the later which supersedes 15815) states that for 1997 through 2005,

listed vehicles, some engines equipped with aluminum cylinder heads may

exhibit spark plug ports with stripped or missing threads, for which

the only authorized service procedure is to replace the cylinder head assembly.



Ford further admits that spark plug blowout in Fords is caused by an engineering defect

by the fact that Ford did finally correct the defect commencing with some 2003

models by doubling the length of the threads in the cylinder head.



In spite of the above, Ford still publicly concedes that there is no defect that

causes the spark plug blowout, has not notified it's customers of the potential problem,

and refuses to pay the $4000 repair bill when a cylinder head has to be replaced due

to a cylinder head spitting out a spark plug.

 

[Chase Straw]

i dont think you've blown a plug though you would see it. if you did you would be missing a plug. they also have a repair called a timesert, i think thats what it is called that lets you tap new threads and insert a insert with out removing the heads

 

[Jake Levin]

Okay we stopped by the local dealership. they claim it's probably the coil. He's taking it to his dealer tonight. He hasn't blown out the plug yet, but from everything we've read on consumer affairs, if he doesn't fix it now, it'll blow out within the next month. Found a really ugly article with many other articles about this known issue with the 5.4l tritons and the 4.6l with the aluminum heads....

 

[Jake Levin]

Okay we stopped by the local dealership. they claim it's probably the coil. He's taking it to his dealer tonight. He hasn't blown out the plug yet, but from everything we've read on consumer affairs, if he doesn't fix it now, it'll blow out within the next month. Found a really ugly article with many other articles about this known issue with the 5.4l tritons and the 4.6l with the aluminum heads....