redfishtd

firing order is 13726548 so misfire can be from each cyl on side of firing order .so check 7 and 6 real good .Thats because misfires are determined by the kick on the crank as its supposed to fire .
Smoke test is where you inject homemade youtube smoke machine into brake booster hose with engine off, block air intake with rags . Smoke can come out all the way back to the rear axle . The shop smoke machines are very expensive .

Cstrickland33

Alright everyone here's an update as of yesterday. I'm changing my spark plug two at a time (because of time and money reasons) so yesterday I changed #5 and #6. When I put to socket on #5 to seat it I noticed how loose it was. That lead me unscrewing it by hand. Which absolutely blew my mind. I started it back up and it showed misfire in #3. I cleared the codes and it has gone away and I've noticed more power. I also do not have the gas smell anymore (coming from the loose spark plug) and better yet my prego wife can't smell it either!

BadFish523

Thats why we said a couple things we did early on in this thread. Make sure all plugs are torqued to 25-28 foot pounds and don't use anti seize. Not the first time weve heard of plugs coming loose. Glad you're getting somewhere with it, better make sure all the other follow those same two rules.

bhunt3450

Hey! Great news. Hope it stays fixed for you.

dukedkt442

Plugs aren't expensive, not compared to the cost of repeated misfires. Replace them all, proper torque, before you have to replace cats and coils. Those are far more expensive.

Glad you're making headway.

Cstrickland33

Yes yes yes, dumb me. I just don't understand why it would show #2 misfire if it wasn't #2!!! But I learn from mistakes. Hopefully by the middle of next month I'll have them all replace.

P.s. anyone have any tricks for taking out the back 4 to make life a little easier?!

dukedkt442

4 8 or 10mm bolts to remove the computer, and then 3 of the same size bolts to remove its bracket. All the space in the world (for an '04-08 F150, that is).

Do you have a tuner on yours? Unplug the battery first... I had mine on level 2 when I disconnected the computer without first disconnecting the battery, and had actually typed up a craigslist ad for the truck before thinking of returning it to stock. Problem solved.

Cstrickland33

By tuner do you mean the edge evo...? If so, then yes! Anything special I need to do?

dukedkt442

bhunt3450

Have you guys seen a difference in fuel mileage with your tunes? I'm getting mixed reviews on them. I could always go for some more fuel mileage.