P1000 code, misfiring, etc.
05-20-2016, 07:21 PM
#11
Old thread, but still relevant. Thought I'd add a little to it since it came up on my sister's 07 5.4 3v.
I've noticed over the years a connection. I'm no scientist, so I can't explain the reasons why.
I did a tune up on my old 94 4.9L straight-6 not long after buying it. Did plugs, wires, cap & rotor along with the rest of the regular stuff. Plugs were in pretty bad shape and looked like they had been run well passed their service life. A couple of weeks later it started running like crap. Couldn't figure it out. Then one of the old techs at the autocraft center at Ft Knox walked by and mentioned checking the coil. Without checking it, I just went ahead and changed the coil. Solved the problem, I never had that problem again for that reason on that truck.
Fast forward a few years. I bought a 02 Ranger 2.3L DOHC 4-banger. Same deal, I go an do a tune-up on it not long after buying it. #4 plug had been in there so long the element had burned down inside the insulation. Rest of the plugs had been changed before, but not recently. About a month later it started running like crap - missing, running really rough. Was long enough later I didn't remember the problems I'd had with the F150 immediately. I had my fuel injectors tested (cause I didn't have the means to do that myself). I changed my fuel filter, MAP sensor, PCV - couldn't figure it out, nothing was fixing it. Until I remember the F150. Swapped the coil pack - presto, fixed the problem.
I'm not saying the plugs have to be burned down really badly, but it seems to me if your plugs are changed and where well used, combined with an older coil - the coil might have been abused and worn out by the unserviceable plugs.
Hope that helps.
-----------------------------------
- Tune-up w/ plug change.
- Results in running rough afterwards.
- Coil might need replacing.
- Check coil.
-----------------------------------
I've noticed over the years a connection. I'm no scientist, so I can't explain the reasons why.
I did a tune up on my old 94 4.9L straight-6 not long after buying it. Did plugs, wires, cap & rotor along with the rest of the regular stuff. Plugs were in pretty bad shape and looked like they had been run well passed their service life. A couple of weeks later it started running like crap. Couldn't figure it out. Then one of the old techs at the autocraft center at Ft Knox walked by and mentioned checking the coil. Without checking it, I just went ahead and changed the coil. Solved the problem, I never had that problem again for that reason on that truck.
Fast forward a few years. I bought a 02 Ranger 2.3L DOHC 4-banger. Same deal, I go an do a tune-up on it not long after buying it. #4 plug had been in there so long the element had burned down inside the insulation. Rest of the plugs had been changed before, but not recently. About a month later it started running like crap - missing, running really rough. Was long enough later I didn't remember the problems I'd had with the F150 immediately. I had my fuel injectors tested (cause I didn't have the means to do that myself). I changed my fuel filter, MAP sensor, PCV - couldn't figure it out, nothing was fixing it. Until I remember the F150. Swapped the coil pack - presto, fixed the problem.
I'm not saying the plugs have to be burned down really badly, but it seems to me if your plugs are changed and where well used, combined with an older coil - the coil might have been abused and worn out by the unserviceable plugs.
Hope that helps.
-----------------------------------
- Tune-up w/ plug change.
- Results in running rough afterwards.
- Coil might need replacing.
- Check coil.
-----------------------------------
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j_kied (02-21-2017)
08-13-2022, 06:52 PM
#13
Senior Member
here's my guess.
On this forum once you scroll down past the bottom of the current thread you are browsing it shows a "similar or relevant" thread which may be quite old.
So if one is not paying close attention it's pretty easy to scroll past the end of the current thread and reply to the old thread at the bottom this reviving it from the dead....
On this forum once you scroll down past the bottom of the current thread you are browsing it shows a "similar or relevant" thread which may be quite old.
So if one is not paying close attention it's pretty easy to scroll past the end of the current thread and reply to the old thread at the bottom this reviving it from the dead....