so i recently was driving and got on it to pass someone and above 3000 its only cylinder 5 no other problems ...??? plugs coil i dont know 5.4 68k all routine maint. c/w this has happened twice now it only does it sometimes ......once last night and once like two weeks ago...

 

anybody ??

 

If you have a code go to an shop that has the computers to read the history that made it throw that code. Definitly the cheapest route. Or just change your coil and plug.

 

yeah it flashes the check engine light both times i stopped shut it off restarted and it was fine but my reader pulls a pending PO305 cylinder 5 misfire

 

Mine did that this week, I replaced the plugs and coil boots and it went away! Plugs are a pain and take about 2 hours just gotta be care full not to pull the treads out... I sprayed PB on all of them and let it sink in for about 45 minutes then they came out fine, and make sure you blow out the hole

 

lol alright guess its time to do the dreaded plugs hopefully i wont have to post a help please !!!! thakns guys

 

It could be just the coil boot or the COP unit.

 

she does have almost 75000 of "mixed" driving *cough* but ill look into it

 

I had a issue that is close to this. I ended up changing plug boots and plugs. The problem turned out to be the wire that supplied power to the coil pack. It was broke, I had to cut it back and solder in a new wire. No problems after that, maybe you have a broken wire that is sometimes not giving you spark. Maybe you already fixed it?