plug change, now missing
Thread Starter
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Bleed Ford Blue
Joined: Apr 2009
Posts: 13,578
Likes: 157
From: Anchorage Alaska
plug change, now missing
ok '04 v10 with 95k on it. factory plugs/coils. i changed just the plugs reused the coils and put everything back together just as i took it apart.
now i have a miss, under load above 2k rpms. at idle or under load below 2k its smooth and has no miss. wtf?!
i'm rather upset and dont know where to go from here. could it be a coil? bad plug? why wouldnt it do it all the time.
i've spent half the night out there with it so i'm going to bed
EDIT, best part theres no CEL to tell me what one it could be...
now i have a miss, under load above 2k rpms. at idle or under load below 2k its smooth and has no miss. wtf?!
i'm rather upset and dont know where to go from here. could it be a coil? bad plug? why wouldnt it do it all the time.
i've spent half the night out there with it so i'm going to bed
EDIT, best part theres no CEL to tell me what one it could be...
Thread Starter
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Bleed Ford Blue
Joined: Apr 2009
Posts: 13,578
Likes: 157
From: Anchorage Alaska
ok after doing some searching which i should have done in the first place, my bad i'm just pissed off lol
tomarrow i'm gonna pull every coil one by one and use a crap ton of dieelectic grease. somtimes it seems the boot can keep it from making full contact with the plug? sounds resonable w/the very crappy design of the whole thing.
i'll start on it in the monring and report back...hopfully good news. bed time now.
tomarrow i'm gonna pull every coil one by one and use a crap ton of dieelectic grease. somtimes it seems the boot can keep it from making full contact with the plug? sounds resonable w/the very crappy design of the whole thing.
i'll start on it in the monring and report back...hopfully good news. bed time now.
Thread Starter
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Bleed Ford Blue
Joined: Apr 2009
Posts: 13,578
Likes: 157
From: Anchorage Alaska
well that didnt work, i'm uber pissed
i guess i'll order 10 new coils what a bunch of BS.
guess i'll be driving my old pickup again this week, last week it was the friggin balljoints.
i should have left well enough alone because it was running great lol
i guess i'll order 10 new coils what a bunch of BS.
guess i'll be driving my old pickup again this week, last week it was the friggin balljoints.
i should have left well enough alone because it was running great lol
Thread Starter
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Bleed Ford Blue
Joined: Apr 2009
Posts: 13,578
Likes: 157
From: Anchorage Alaska
OMG!
i'm so pissed.
i bought a brand new coil, swapped it out with every coil. no differance! wtf? could it be a bad plug? do i need to buy 9 more new coils? i'm really at a loss and very upset i have a 8000lbs paper weight.
any ideas/help would be wonderful.
i'm so pissed.
i bought a brand new coil, swapped it out with every coil. no differance! wtf? could it be a bad plug? do i need to buy 9 more new coils? i'm really at a loss and very upset i have a 8000lbs paper weight.
any ideas/help would be wonderful.
Mountain Pass
Joined: Mar 2009
Posts: 158
Likes: 46
Go back and push down on all the fuel injector plugs, we knocked one loose while doing the plugs on my brother in laws a couple weeks ago. Went around the block and had a miss, ended up the clip that locks the plug onto the injector broke, zip tied it down and fixed his. Just a thought.
Moderator
Joined: May 2004
Posts: 6,507
Likes: 896
From: Home Base Nebraska
It sounds to me like you may have a bad boot, you should be able to isolate the bad one by disconnecting one coil or injector at a time. When you pull a good one the miss will get worse.
Denny
Denny
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Thread Starter
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Bleed Ford Blue
Joined: Apr 2009
Posts: 13,578
Likes: 157
From: Anchorage Alaska
i was able to get a code P0356 Ignition Coil F Primary/Secondary Circuit Malfunction but i think that was from me disconnecting coils.
the biggest issue is at idle it runs smooth. you can only really hear/feel it under load 1k-above. this makes it hard to figure out by disconnecting coild becuse it feels/sounds like its running perfectly smooth so disconnecting any of the coils causes it to be worse.
i checked all the injector connections, all are tight thanks for the idea though.
i'm thinking of putting all the factory plugs back in and seeing what happends just for ****s and giggles. i'm really out of ideas.
the biggest issue is at idle it runs smooth. you can only really hear/feel it under load 1k-above. this makes it hard to figure out by disconnecting coild becuse it feels/sounds like its running perfectly smooth so disconnecting any of the coils causes it to be worse.
i checked all the injector connections, all are tight thanks for the idea though.
i'm thinking of putting all the factory plugs back in and seeing what happends just for ****s and giggles. i'm really out of ideas.
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Thread Starter
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Bleed Ford Blue
Joined: Apr 2009
Posts: 13,578
Likes: 157
From: Anchorage Alaska
no sir, you think this could be it? i changed plugs on my other OBD2 trucks and never had an issue w/out doing so. are these new mod motors different when it comes to that?
Mountain Pass
Joined: Mar 2009
Posts: 158
Likes: 46
We did not have to reset or disconnect the battery on my brother in laws truck. I think I would start swapping the plugs one at a time like you did the coils just to rule that out, one could be bad or cracked stranger things have happend. My truck just rolled 90,000 this week thinking about doing my plugs soon.
Elder User
Joined: Jan 2003
Posts: 851
Likes: 5
From: On top of a big hill...
Bad coil pack??
AlaskanEX-I had the same exact thing happen to me a month ago after changing my plugs. The engine had a miss at idle and would even quit while idlng in "D".
It started throwing a check engine light with a code for bad OSS. So I replaced the OSS with no improvement. Ended up taking it into the Ford dealer and they diagnosed it with faulty coil on number five cylinder. They replaced the pack, plug, cleanded the cylinder and it's running fine now.
The mechanic says it's not the first time he's seen that after a plug change and that's it easy to damage a coil pack, especially after the truck has a few miles on it. The OSS thing was something to do with the drive train's timing being thrown off.
I was real PO'ed too but cool off and run it into a Ford dealer and let them hook up the Ford Tech computer and pinpoint the issue. It's going to be something simple and I'd let them help you before you throw a bunch of your time and more parts at it.
It started throwing a check engine light with a code for bad OSS. So I replaced the OSS with no improvement. Ended up taking it into the Ford dealer and they diagnosed it with faulty coil on number five cylinder. They replaced the pack, plug, cleanded the cylinder and it's running fine now.
The mechanic says it's not the first time he's seen that after a plug change and that's it easy to damage a coil pack, especially after the truck has a few miles on it. The OSS thing was something to do with the drive train's timing being thrown off.
I was real PO'ed too but cool off and run it into a Ford dealer and let them hook up the Ford Tech computer and pinpoint the issue. It's going to be something simple and I'd let them help you before you throw a bunch of your time and more parts at it.
Thread Starter
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Bleed Ford Blue
Joined: Apr 2009
Posts: 13,578
Likes: 157
From: Anchorage Alaska
i havent got anymore money to throw at a shop. i can cover new coils and my time but otherwise i'll be up a creek. between different bills this month i've been hemorrhaging money like crazy. i have another truck to drive(more then a few luckly) so even if it takes alittle time i'm ok with that.
tomorrow after work i'll try swaping a old plug one by one back in and see what happends. then try swaping the one new coil again if that doesnt do it.
can anyone explain how the boot can cause issues like this? this is my first modular motor so its all new to me. i've done plugs on my 5.0s and 4.0s many many times and never had an issue..but ofcouse they had one coil pack and plug wires which i think worked just fine lol
i'm trying to calm down and think it through, i have a problem with getting pissed and throwing parts at things like this, but i cant afford that now. if i had the cash i woulda allready brought it to a shop lol
tomorrow after work i'll try swaping a old plug one by one back in and see what happends. then try swaping the one new coil again if that doesnt do it.
can anyone explain how the boot can cause issues like this? this is my first modular motor so its all new to me. i've done plugs on my 5.0s and 4.0s many many times and never had an issue..but ofcouse they had one coil pack and plug wires which i think worked just fine lol
i'm trying to calm down and think it through, i have a problem with getting pissed and throwing parts at things like this, but i cant afford that now. if i had the cash i woulda allready brought it to a shop lol
FTE Leadership Emeritus
Joined: Jul 2002
Posts: 42,561
Likes: 420
From: Long Island USA
What brand plugs did you use? Non-motorcraft/Autolite plugs are known to cause a misfire for some reason.
Also, what else did you touch while doing the plugs? Remove any PCV or intake tubing? Of course you did
Double check all vacuum connections. Also, double check all the injector plugs making sure you didn't dislodge one by accident.
Also, what else did you touch while doing the plugs? Remove any PCV or intake tubing? Of course you did
Double check all vacuum connections. Also, double check all the injector plugs making sure you didn't dislodge one by accident.