2001 F150 5.4: Intake gasket?

69fastback · April 25th, 2011, 02:02 PM

I have an '01 F150 5.4, and I started getting the common misfire. I had a friend of mine scan it, and number 8 was the only cylinder misfiring. I went to replace the COP, and the plug, and when I pulled the plug out, I noticed it had what smelled like antifreeze all over it. It had leaked down from the top, because the plug socket was covered, as well, as the top of the plug. The liquid was dark and oily, but didn't seem to actually be motor oil, and smelled like antifreeze. I'm assuming it has just sat down there and became dirty.

I replaced the COP and plug, and it almost immediately started having the same misfire, as I expected it would. I started looking around, and I've found a few small traces of antifreeze near the front of the intake. It doesn't appear to be coming from the radiator hose on that side, although there is a little just aft of where the hose connects to the intake. It's so hard to see anything, that I can't tell exactly where it is coming from, but I assume the intake gasket is leaking, and the water is working it's way down into the COP, and causing my misfires. It's getting pretty bad too. It's really gotten bad over the weekend, and I really don't want to drive it anymore.

I'm just curious if anyone has seen anything similar, and if there's something I should look for before I tear into the top of it to replace the intake gaskets? Something that I may be overlooking? Thanks in advance.

Destination S197 · April 26th, 2011, 12:15 PM

Check the first and last post here.

Ford F150 - 5.4L/2002 - Intake manifold/gasket leak into sparkplug cup. - Ford F150 .net

Sounds like you're on the right track with the intake gasket.

69fastback · April 26th, 2011, 04:04 PM

Yeah, that's almost got to be what it is. Joy for me. Instead of finishing my car up this weekend, I get to tear my DD apart.

Destination S197 · April 26th, 2011, 04:19 PM

Goodluck with it dude, I know how much it sucks.

April 25th, 2011, 02:02 PM	#1
69fastback Premium Member 1969 Mustang Mach 1 6.824@101.61 Join Date: Aug 2006 Location: Oklahoma jackass, get to driving Posts: 5,572 iTrader: 0 reviews	2001 F150 5.4: Intake gasket? I have an '01 F150 5.4, and I started getting the common misfire. I had a friend of mine scan it, and number 8 was the only cylinder misfiring. I went to replace the COP, and the plug, and when I pulled the plug out, I noticed it had what smelled like antifreeze all over it. It had leaked down from the top, because the plug socket was covered, as well, as the top of the plug. The liquid was dark and oily, but didn't seem to actually be motor oil, and smelled like antifreeze. I'm assuming it has just sat down there and became dirty. I replaced the COP and plug, and it almost immediately started having the same misfire, as I expected it would. I started looking around, and I've found a few small traces of antifreeze near the front of the intake. It doesn't appear to be coming from the radiator hose on that side, although there is a little just aft of where the hose connects to the intake. It's so hard to see anything, that I can't tell exactly where it is coming from, but I assume the intake gasket is leaking, and the water is working it's way down into the COP, and causing my misfires. It's getting pretty bad too. It's really gotten bad over the weekend, and I really don't want to drive it anymore. I'm just curious if anyone has seen anything similar, and if there's something I should look for before I tear into the top of it to replace the intake gaskets? Something that I may be overlooking? Thanks in advance. __________________ ./___ _ ____ ___ \. ( ]]] _ _ O _ _ [[[ ) \_ o _ _____ _ o _/ \|___\| ......... \|___\| http://www.youtube.com/watch?v=HyYU3...e_gdata_player

April 26th, 2011, 12:15 PM	#2
Destination S197 Getting Laid Is A Bitch 2007 Mustang GT 13.481 @ 103.65 Join Date: Apr 2009 Location: Baton Rouge, LA Posts: 2,226 iTrader: 1 reviews	Check the first and last post here. Ford F150 - 5.4L/2002 - Intake manifold/gasket leak into sparkplug cup. - Ford F150 .net Sounds like you're on the right track with the intake gasket. __________________ Saleen wheels / Front: 255/45/ Rear: 275/40/ Steeda CAI / 93 Perf. Bama tune Corsa Xtremes, K Springs, Koni STR.Ts, UMI lca relo. Brackets/r lwr ctrl arms J&M adj. panhard bar / Camber plates.

April 26th, 2011, 04:04 PM	#3
69fastback Premium Member 1969 Mustang Mach 1 6.824@101.61 Join Date: Aug 2006 Location: Oklahoma jackass, get to driving Posts: 5,572 iTrader: 0 reviews	Yeah, that's almost got to be what it is. Joy for me. Instead of finishing my car up this weekend, I get to tear my DD apart. __________________ ./___ _ ____ ___ \. ( ]]] _ _ O _ _ [[[ ) \_ o _ _____ _ o _/ \|___\| ......... \|___\| http://www.youtube.com/watch?v=HyYU3...e_gdata_player

April 26th, 2011, 04:19 PM	#4
Destination S197 Getting Laid Is A Bitch 2007 Mustang GT 13.481 @ 103.65 Join Date: Apr 2009 Location: Baton Rouge, LA Posts: 2,226 iTrader: 1 reviews	Goodluck with it dude, I know how much it sucks. __________________ Saleen wheels / Front: 255/45/ Rear: 275/40/ Steeda CAI / 93 Perf. Bama tune Corsa Xtremes, K Springs, Koni STR.Ts, UMI lca relo. Brackets/r lwr ctrl arms J&M adj. panhard bar / Camber plates.

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