7.3L spark plug/coil wire failure
- OP 🔹 Stonegrey20
- Start date
- Jan 20, 2020
- 483
- 1,100
- 2020 F250 7.3 Tremor Lariat, Magnetic w/chrooome
- Santa Cruz Vala
Because I had an early truck and the idle was rough. If you're not having issues, run stock.
Still waiting on your Firecore plug wire report sir
Bump. Would like to know if the firecore wires are a better alternative to factoryStill waiting on your Firecore plug wire report sir
- Jan 20, 2020
- 483
- 1,100
- 2020 F250 7.3 Tremor Lariat, Magnetic w/chrooome
- Santa Cruz Vala
5000 miles of towing 10k and 15k packages and they (Firecores) are fine. No weird smells, no misfires, etc. She runs like a top.
I'm not going to purposely pull them off right now for a comprehensive review... I am way too busy for that, but my experience with the Firecores has been very positive. Apparently Ford has made different shields for these wires and maybe the problem is fixed, I don't know. If purchasing Motorcraft parts or Firecore, I wouldn't hesitate to run Firecore. Will they last 100k? I have no idea. Will the stock ones last? Depends who you ask.
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I had installed my new aftermarket wires back when I first got the truck back from the dealership. Their warranty work concluded that there were multiple misfires and they stated they found no issue with wires, cleared codes and suggested that there was still a “slight” (LOL) misfire occurring they could see on their analyzer but that it was not tripping the check engine code…
I’ve subsequently got the truck back and frankly could just hear what seemed to be a slight misfire /roughness while idling… at that point I just replaced with my new after market “Massive” wires and instantly the idle sounded better. No codes since and truck running perfectly.
I tinkered with the idea of putting the factory wires back in and letting them fail again but frankly I hate the notion of waiting for FORD to correct this issue with a permanent fix.
Seems obvious the wires were the problem in my case as this all started with about 800~ miles…
Now over 5K and no problems since.
Towed a large piece of EQ recently and truck handled that perfectly.
Very happy with the Godzilla overall, and care less that it’s averaging 12MPG…
Love the response and feel of the engine, I’m a diesel guy but just wanted one more gasser in my corral…
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- Jan 20, 2020
- 483
- 1,100
- 2020 F250 7.3 Tremor Lariat, Magnetic w/chrooome
- Santa Cruz Vala
Have you gotten the burning plastic smell from the Massive wires yet?
I had heard of it but did not get it at all! No issue whatsoever with them to date, I’ve gotten about 4,500 miles on them and no issue.
I had one of the first Tremors, and never had a spark plug issue in my 30k miles.
...so now I drive around like a fool with the original wires in a bag under the seat with the Massive wires installed, performing just fine (so far) AND the new 7.3 RV style wires in another bag under the seat...ridiculous
Well, if anyone wants a set of never used Massive wires, PM me. I don’t think I will need them on the 6.7L
Last piece on this as I’m just over 9 k on the massive wires and NO issues whatsoever. Though since I’ve heard so many folks complaining about burnt massive wires and frankly I’m really not wanting to change wires again or deal with ford dealer on warranty claim. I went ahead and added “heat shield boots” to each wire, quick and easy and now hopefully this issue is permanently at rest…
Again, I’ve had NO issues with Massive wires whatsoever simply being overprotective I guess…
Contrastingly, My OEM wires didn’t make it to 1K….
Thanks
Again, I’ve had NO issues with Massive wires whatsoever simply being overprotective I guess…
Contrastingly, My OEM wires didn’t make it to 1K….
Thanks
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Wasn't there more post or maybe another thread for the wire problems? Can't find it.
Also can't believe people pumping those massive wires that are complete garbage.
Burnt smell within 100 miles and constant random misfires on a weekly basis after about 1-2k miles on them whenever wot pushes heat through the exhaust manifold.
Anyhow. Just put in the C type wires and hoping they resolve the problem.
May look into the lavawrap/heatshield one day if I get bored and have time.
Also can't believe people pumping those massive wires that are complete garbage.
Burnt smell within 100 miles and constant random misfires on a weekly basis after about 1-2k miles on them whenever wot pushes heat through the exhaust manifold.
Anyhow. Just put in the C type wires and hoping they resolve the problem.
May look into the lavawrap/heatshield one day if I get bored and have time.
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- Jan 20, 2020
- 483
- 1,100
- 2020 F250 7.3 Tremor Lariat, Magnetic w/chrooome
- Santa Cruz Vala
I installed the C wires last month and so far so good.
I agree that people should NEVER BUY MASSIVE WIRES. They are complete garbage. Same goes for the Firecores.
I agree that people should NEVER BUY MASSIVE WIRES. They are complete garbage. Same goes for the Firecores.
I don’t think the heat shield is going to help much. My experience was that the high rpm when towing up grades created higher ignition voltage (+40kv) which generates excessive heat from inside the plug boots. My Massive wires literally melted from the inside out. Failure was always at the wire connection to the plug. Hopefully the new C type stock wires are more robust than original or aftermarket wires. I could not wait around for Ford to fix it so I went to the diesel.
Wasn't there more post or maybe another
Main problem isn't necessarily the plug wires it's HEAT. So, I am still considering adding this product to my exhaust. I understand heat from voltage. Just think that combined with heat from exhaust is main culprit due to my experiences. Certainly doesn't help having excess heat in combination to electrical heat
Engine bay heat also boiling both my batteries and causing acid to bleed out the caps.
www.heatshieldproducts.com
I swear I posted all about the problems somewhere around here. Another thread that was over 10 pages??? Seems to be gone?
Main problem isn't necessarily the plug wires it's HEAT. So, I am still considering adding this product to my exhaust. I understand heat from voltage. Just think that combined with heat from exhaust is main culprit due to my experiences. Certainly doesn't help having excess heat in combination to electrical heat
Engine bay heat also boiling both my batteries and causing acid to bleed out the caps.
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RnR 3x+ times. 1st was just the "bad" wire on cylinder #2 after going into limp mode on side of cliff towing my TH. 2nd was for massive wires. 3rd was back to stock "a" wires to return the massive and eliminate the constant random misfires and cel resets. Lastly was to "c" type wires. Never went through wheel well as I ordered it with plastic liners and such. 1st RnR was a pita. Last one yesterday I could practically do with eyes closed as I use feel to find the plug and guide wire boot at same time. Was done in less than 20 minutes. Just have to double check they are fully snapped on and locked good, both to coil and plug. GL
After replacing plugs 5 times on various CO mountain passes, it did get pretty easy though cylinder 4 always gnawed my hands. When the battery boiled over 50 miles from a cell tower in the desert north of SLC (+100F), I was just done with Godzilla. Got 22k on the 6.7L since end of July, 17k towing, no complaints with King Kong.
I can deal with a few issues and work out the kinks. With all the maintenance cost (trade off) of the diesel I could buy a new crate 7.3 and such when that time comes. Or maybe just do a bulletproof rebuild???
NO diesels are w/o problems of their own...ESPECIALLY with ALL the emissions crap they put on them. If I wasn't concerned about warranty, smog test and fines (if caught), then I would go with 6.7 and delete.
Unfortunately spending $20k for a new engine not covered by warranty would be one of those drive the thing off the cliff feelings.
Maybe something like this whenever Godzilla blows up???
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