jrobie79
Active Member
- Joined
- December 27, 2010
- Messages
- 99
- Reaction score
- 0
- City, State
- Boston, MA
- Year, Model & Trim Level
- 2002 Limited 4.6 VIN "W"
background: explorer ran fine for a year or so after I bought it, however would notice sometimes at WOT the CEL would flash briefly till I let off the gas, and it would accelerate and run fine
fast forward to a week ago, I finally got a CEL that was constant...ran the code and got p0306...misfire cylinder 6...I knew the wires needed changing, so I swapped those out, seemed to work for a bit but then it came back.
check the codes again and I'm getting p0306 and p0304, seems to have grown to cylinder 4 as well. The CEL flashes while driving, but remains solid if I roll for a bit and am at a stoplight, until I accelerate again, then in blinks.
I checked the coil pack via some method I found on here, it seems in spec, the secondary readings were all pretty much identical, and the primary one gave me 1.1-1.3 ohms on all 3 pins.
the fuel filter was replaced less than 15K ago...along with the plugs. the 6th cylinder plug didn't look that different either, I was going to swap the plugs from bank 1 to bank 2 and vice versa to see if that helps, but I'm kinda stumped now? I was reading that vacuum leaks could cause that, but I took starting fluid and sprayed it around connections with no noticeable engine revving. I cleaned the MAF tonight and it didnt help.
possibly the intake manifold gaskets? it just seems weird to me that its only cylinder 4 and 6 but skips 5, so its not that whole bank...I'm starting a new job in a month or so, but i commute like 110 miles a day and I need this to last me another month or two (it has 255K on it, so a new vehicle is in the cards)
fast forward to a week ago, I finally got a CEL that was constant...ran the code and got p0306...misfire cylinder 6...I knew the wires needed changing, so I swapped those out, seemed to work for a bit but then it came back.
check the codes again and I'm getting p0306 and p0304, seems to have grown to cylinder 4 as well. The CEL flashes while driving, but remains solid if I roll for a bit and am at a stoplight, until I accelerate again, then in blinks.
I checked the coil pack via some method I found on here, it seems in spec, the secondary readings were all pretty much identical, and the primary one gave me 1.1-1.3 ohms on all 3 pins.
the fuel filter was replaced less than 15K ago...along with the plugs. the 6th cylinder plug didn't look that different either, I was going to swap the plugs from bank 1 to bank 2 and vice versa to see if that helps, but I'm kinda stumped now? I was reading that vacuum leaks could cause that, but I took starting fluid and sprayed it around connections with no noticeable engine revving. I cleaned the MAF tonight and it didnt help.
possibly the intake manifold gaskets? it just seems weird to me that its only cylinder 4 and 6 but skips 5, so its not that whole bank...I'm starting a new job in a month or so, but i commute like 110 miles a day and I need this to last me another month or two (it has 255K on it, so a new vehicle is in the cards)