Wet around #4 plug. - Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars
Ford F-100 | Ford F-150 | Ford F-250 | Ford F-350 | Ford Super Duty | Ford Diesel Forum for discussion of the Ford F100, F150, F250, F350, Superduty and Diesel trucks.

Reply
 
LinkBack Thread Tools Display Modes
post #1 of 11 (permalink) Old 12-06-12, 02:03 PM Thread Starter
Registered User
 
Join Date: Oct 2011
Posts: 252
Wet around #4 plug.

Buddys 1997 F150, 4.6L V8, 120,000 miles

Throwing P0304 code - Misfire on #4.

Pulled plugs and found that the top of the plug and up into the boot was wet with antifreeze (Or maybe Winter washer fluid - it hadn't evaporated off over night). Definite arc tracks along the insulator.

I have been trying to search here for information on if there is a common leak point on the intake manifold leaking coolant or anything else into this area and have come up short.

Was this likely a fluke and some water from some time got in there and sat long enough to eat the boot seal and provide a path for the spark? Or is there something common?

TDIDog is offline  
Sponsored Links
Advertisement
 
post #2 of 11 (permalink) Old 12-06-12, 06:00 PM
Dazed and Confused
 
CatSkinner's Avatar
 
Join Date: May 2012
Location: Upstate New York
Posts: 5,844
Re: Wet around #4 plug.

Well, given the age, it could've always developed a leak, Id clean it up and see where things go.

Ever notice that there's so many high performance parts available for GM products?

Did you ever think that maybe they NEED them?
CatSkinner is offline  
post #3 of 11 (permalink) Old 12-06-12, 06:04 PM Thread Starter
Registered User
 
Join Date: Oct 2011
Posts: 252
Re: Wet around #4 plug.

Quote:
Originally Posted by CatSkinner View Post
Well, given the age, it could've always developed a leak, Id clean it up and see where things go.
I guess what I'm hoping to learn is if there is a common fail point here, but maybe there isn't.

HEH...

Prius repellant, just add gas.

In the TDI world, it's "...just add diesel"
TDIDog is offline  
post #4 of 11 (permalink) Old 12-06-12, 06:59 PM
Dazed and Confused
 
CatSkinner's Avatar
 
Join Date: May 2012
Location: Upstate New York
Posts: 5,844
Re: Wet around #4 plug.

I'm not sure there isn't, but looking at it from the age of the truck, it's difficult to claim a fail point. I diagnose things for a living, but I'm not an auto mechanic, that's just a hobby for me. I don't think I'd have the patience to do it for a living. When confronted with an anomaly on working system, getting the problem to repeat itself is one the first steps in trouble shooting. Hence, clean the fluid and see if it comes back.

Good luck!

Ever notice that there's so many high performance parts available for GM products?

Did you ever think that maybe they NEED them?
CatSkinner is offline  
post #5 of 11 (permalink) Old 12-06-12, 07:11 PM
Registered User
 
Join Date: Aug 2011
Posts: 165
Re: Wet around #4 plug.

Look up!
Heater connections above.
Anti freeze won't evaporate very fast if at all.
It's Ethylene Glycol.
Bluegrass is offline  
post #6 of 11 (permalink) Old 12-06-12, 07:13 PM Thread Starter
Registered User
 
Join Date: Oct 2011
Posts: 252
Re: Wet around #4 plug.

Quote:
Originally Posted by CatSkinner View Post
I'm not sure there isn't, but looking at it from the age of the truck, it's difficult to claim a fail point. I diagnose things for a living, but I'm not an auto mechanic, that's just a hobby for me. I don't think I'd have the patience to do it for a living. When confronted with an anomaly on working system, getting the problem to repeat itself is one the first steps in trouble shooting. Hence, clean the fluid and see if it comes back.

Good luck!
Cleaning it and waiting, is a slow method and can work, but if damage is occurring because of waiting, I would rather know before the damage occurs.

If no one knows right off about a common fail point, then the clean and wait is the way to go.

And, BTW, I am a mechanic for a living. Just so you know. :)
TDIDog is offline  
post #7 of 11 (permalink) Old 12-06-12, 07:16 PM Thread Starter
Registered User
 
Join Date: Oct 2011
Posts: 252
Re: Wet around #4 plug.

Quote:
Originally Posted by Bluegrass View Post
Look up!
Heater connections above.
Anti freeze won't evaporate very fast if at all.
It's Ethylene Glycol.
D'oh! I had to fight around them to get to the plug. I'll have a good look at those hoses. Thanks for the smack in the head.
TDIDog is offline  
post #8 of 11 (permalink) Old 12-06-12, 07:45 PM
2002 F150 XLT
 
Bert's Avatar
 
Join Date: Nov 2008
Location: Oregon
Posts: 10,316
Re: Wet around #4 plug.

Besides the hose, check the fitting into the manifold.

Bert
Bert is offline  
post #9 of 11 (permalink) Old 12-06-12, 08:02 PM Thread Starter
Registered User
 
Join Date: Oct 2011
Posts: 252
Re: Wet around #4 plug.

Quote:
Originally Posted by Bert View Post
Besides the hose, check the fitting into the manifold.
Oh... I didn't see a a fitting back there. Is it one to/from the heater core? Eh. I have a resource that I can look at. Hopefully I can find some good pictures.
TDIDog is offline  
post #10 of 11 (permalink) Old 12-06-12, 08:19 PM Thread Starter
Registered User
 
Join Date: Oct 2011
Posts: 252
Re: Wet around #4 plug.

OK, I found a picture but apparently it takes time for pictures to happen here. But here is a try:

TDIDog is offline  
Sponsored Links
Advertisement
 
Reply

  Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars > Ford Trucks | Utes | Vans |SUVs | Crossovers > Ford F-100 | Ford F-150 | Ford F-250 | Ford F-350 | Ford Super Duty | Ford Diesel


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome