#4 cylinder problems help!!!
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Junior User
Joined: Nov 2011
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#4 cylinder problems help!!!
I have a 98 f150 4.6L trition. I'm having a miss fire from according to my code reader (p0304) in the 4th cylinder.since I bought the truck back 3 years ago, iv had multiple problems with just this one cylinder. I changed sparkplugs a few times, last winter I changed all sparkplugs, wires and coil packs. Now its almost been a year and it happened again. I again changed the plug and wire, still have a miss, it really rumbles when idleing. I had an extra coil pack in my garage, so I tried that, still a miss. So I read up on some fourms and found that it might be a leaking head gasket. If so I can do this on my own,but I would like to know if anyone has any other idea of what to do or what the problem is. Also what other upgrades should I do along with a head gasket replacement? My truck has a little over 200000 miles and I want to keep it going.
Thanks in advance for any help!
Thanks in advance for any help!
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Joined: Jul 2005
Posts: 11,931
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Does it use any antifreeze ? I had a similar problem withe #1 cylinder on a 5.4 . Finally ended up putting a bottle of BARS copper head gasket sealer in with the antifreeze and problem solved. Somem dont like the stuff, but i had great luck with it 2 years ago.
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