Yeah, these are difficult to diagnose with such a dispersed data set. The only thing I've seen in common is a long heavy tow up a grade in the recent drive history.
But, as I said, incomplete data, so it is a theory.
Who has a 7.3 and experienced the "misfire" plug wire concern or not please leave feedback
- OP 🔹 fordguy74656
- Start date
But, as I said, incomplete data, so it is a theory.
Build date 8/17/2020 ~ 10,500 - No issues. However, I have not had a long heavy tow up a grade.
How many of you folks that are reporting no issue, might have it but are not sensing it in your driving? A monster V8 that is really running on 7 only has a slight flutter because the other 7 are pulling the load. The most obvious effect is a loss of acceleration. Do any of you sense that it just isn't picking up speed like it did in the first 100 or so miles?
There's absolutely no way you wouldn't know it. You'll get an engine light flashing for one and the truck goes into limp mode with reduced power where 3/4s of the pedal is what 1/4 normally is and it shakes so bad it starts to make you sick if you're going over 40 mph.
Haven't experienced the issue, but did order a spare wire as an ounce of prevention is worth a pound of cure...
The
trucks are smart enough that it would tell us.
It's a valid point, but the one I test drove didn't. No light, nothing, and the truck didn't shake. The most obvious signal was a gutless take off.
I dont think the truck would be misfiring and not reporting it the gutless takeoff and hesitation happens different thing though
Throttle issues
I've seen posts about pedal commander? I'm not sure if my issue fits that. So. Rolling at a slow speed below 2000 rpm. At times when I give it the go. I get a no. The engine will go back to idle before it does anything. Think pulling out into traffic and their you sit not going...
www.fordtremor.com
Has anyone installed the RV wires? LC3Z-12286-C is the part number.
2022 600 miles misfire
Man that sucks.
2021, almost 3,000 miles... no issues. I do have a set of HD aftermarket wires on hand should I have a problem. Have not had the need to even think of replacing the stock wires yet. When I floor it, it hauls ass.... if there were any issues with the ignition system, it would sputter and hesitate a bit, even with 7 out of 8 firing. Zero issues to date.
Build date is 8/24/20, delivery date 10/8/20. has 4200 miles no problems yet. BUT at 3500 miles I bought a set of fire core wires for it and kept the OEMs for spares.
Trading my 21 non Tremor today on a 22 Tremor I ordered. 3000 miles and has been a joy to drive.
Almost hate to trade it because it has no issues
Almost hate to trade it because it has no issues
I have documented my issues with the 7.3L on other post but will recap here.
I had a 2020 F350 Lariat Sport with a 12/19/2019 build date that I purchased new in April 2020. It had a rough cold start/cold idle early on. Picked up my Cirrus 820 truck camper in May 2020 and did many trips around Colorado, Wyoming and Utah throughout 2020. Decided in early 2021 to trade truck camper for a Black Series HQ19 that we picked up in south AZ and drove back to Denver without truck issues, I had about 28k miles on the truck at that time. In March, my Dad had a stroke so we packed up in a blizzard and hauled ass cross country in 3 days to NC pulling the camper. Arriving in NC after a hard push through the NC mountains, I had a severe delayed start after unhooking the trailer before heading to the hospital. Next morning had another delayed start so I stopped by my buddies Ford dealership in Raleigh NC. They ran diagnostics but found no codes. I had them order me the plug wires because I had seen the TFLtruck video and I threw them under the back seat. We made a return a week later via the southern route down to Pensacola before returning to CO with occasional delayed starts but still no lights or limp mode. Not much towing in April as we were back in NC. In May, I installed Massive wires which helped with the delayed start for a couple of days but it returned once we did a drive over an hour. Started a move to Utah in early June and when hauling a UHAUL trailer smelled burning at the top of grade south of Laramie. Stopped at dealership in Laramie and no codes still, truck had cooled by the time he ran diagnostics. Several trips over the next week back and forth between CO and UT with delayed starts and smelling burning rubber. Last trip in mid June was pulling the camper west on I70 out of Denver, had misfires at the top of the hill in Evergreen with check engine lights and limp mode. Stopped in Idaho Springs and let it cool down (engine temps never exceeded 218F) and called Silverthorne Ford. Drove the Ike with more misfires and check engine light and limped into Silverthorne where they ran diagnostics. Lost cylinder 5 & 6 wires with no stock wires available. Luckily I had the two in my truck from March. Replaced wires camped at Steamboat and proceeded the next day. More misfires west of Craig and Vernal but I didn’t have more wires. I ordered a set of OEM A wires and replaced all 8 the next week. Every Massive wire had different levels of melting on the boot. The OEM lasted a couple of days before delayed start returned. Finally got an appointment for service first week of July. Cylinder 1 & 4 wire was toast they replaced both wires. Dealer was going to order new wires, plugs and coil packs but it was going to be August before the coil packs would be in. I got a check engine light leaving the dealership and returned, cylinder 1 had misfired on the on ramp. Limped around for a couple of weeks. Massive sent replacement wires that are sitting in my garage still unopened. I ordered a set of C wires to check them out (returned never installed). They are different from the non motorhome A wires. Truck boiled out the battery in July a week before we were to go to Yellowstone with my 90 year old father in law. Went to the dealership the next day and traded it in for a 2021 F350 Lariat Sport diesel. The 7.3L had 34k miles on it. Like I said in other post, I was probably an exception and most 7.3L will not have problems but I could no longer trust that vehicle and won’t own a truck that I can’t be sure will start and stay running in the middle of nowhere. Happy with the diesel, 6k since the last week of July. No issues towing on a trip to Yellowstone and to the Oregon coast and a couple of off-road excursions with and without the camper. Heading to Arizona next week, camper in tow.
I had a 2020 F350 Lariat Sport with a 12/19/2019 build date that I purchased new in April 2020. It had a rough cold start/cold idle early on. Picked up my Cirrus 820 truck camper in May 2020 and did many trips around Colorado, Wyoming and Utah throughout 2020. Decided in early 2021 to trade truck camper for a Black Series HQ19 that we picked up in south AZ and drove back to Denver without truck issues, I had about 28k miles on the truck at that time. In March, my Dad had a stroke so we packed up in a blizzard and hauled ass cross country in 3 days to NC pulling the camper. Arriving in NC after a hard push through the NC mountains, I had a severe delayed start after unhooking the trailer before heading to the hospital. Next morning had another delayed start so I stopped by my buddies Ford dealership in Raleigh NC. They ran diagnostics but found no codes. I had them order me the plug wires because I had seen the TFLtruck video and I threw them under the back seat. We made a return a week later via the southern route down to Pensacola before returning to CO with occasional delayed starts but still no lights or limp mode. Not much towing in April as we were back in NC. In May, I installed Massive wires which helped with the delayed start for a couple of days but it returned once we did a drive over an hour. Started a move to Utah in early June and when hauling a UHAUL trailer smelled burning at the top of grade south of Laramie. Stopped at dealership in Laramie and no codes still, truck had cooled by the time he ran diagnostics. Several trips over the next week back and forth between CO and UT with delayed starts and smelling burning rubber. Last trip in mid June was pulling the camper west on I70 out of Denver, had misfires at the top of the hill in Evergreen with check engine lights and limp mode. Stopped in Idaho Springs and let it cool down (engine temps never exceeded 218F) and called Silverthorne Ford. Drove the Ike with more misfires and check engine light and limped into Silverthorne where they ran diagnostics. Lost cylinder 5 & 6 wires with no stock wires available. Luckily I had the two in my truck from March. Replaced wires camped at Steamboat and proceeded the next day. More misfires west of Craig and Vernal but I didn’t have more wires. I ordered a set of OEM A wires and replaced all 8 the next week. Every Massive wire had different levels of melting on the boot. The OEM lasted a couple of days before delayed start returned. Finally got an appointment for service first week of July. Cylinder 1 & 4 wire was toast they replaced both wires. Dealer was going to order new wires, plugs and coil packs but it was going to be August before the coil packs would be in. I got a check engine light leaving the dealership and returned, cylinder 1 had misfired on the on ramp. Limped around for a couple of weeks. Massive sent replacement wires that are sitting in my garage still unopened. I ordered a set of C wires to check them out (returned never installed). They are different from the non motorhome A wires. Truck boiled out the battery in July a week before we were to go to Yellowstone with my 90 year old father in law. Went to the dealership the next day and traded it in for a 2021 F350 Lariat Sport diesel. The 7.3L had 34k miles on it. Like I said in other post, I was probably an exception and most 7.3L will not have problems but I could no longer trust that vehicle and won’t own a truck that I can’t be sure will start and stay running in the middle of nowhere. Happy with the diesel, 6k since the last week of July. No issues towing on a trip to Yellowstone and to the Oregon coast and a couple of off-road excursions with and without the camper. Heading to Arizona next week, camper in tow.
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I plan on having my dealer check the codes on my truck when I have it in for service next, just to see. No issues that I have noticed yet, plus I did a 1600 mile trip towing 7k this summer (Az, NM, & TX) with some decent grades and 100+ temps, and no issues. Truck is a 2020 built early September I believe.
Almost 10k miles, much of it heavy towing, big grades (7%). Engine and trans have been flawless.
When I see recurring issues with same cylinder even after replacing wires it indicates to me the wires may be symptom, not the problem. I wonder how those coils test, higher voltage than the others? Spark plugs an issue? Too much anti-sieze on the threads not allowing good ground? Bad plugs?
Anybody go through all that stuff when dealing with this?
Jcamper
When I see recurring issues with same cylinder even after replacing wires it indicates to me the wires may be symptom, not the problem. I wonder how those coils test, higher voltage than the others? Spark plugs an issue? Too much anti-sieze on the threads not allowing good ground? Bad plugs?
Anybody go through all that stuff when dealing with this?
Jcamper
2020 with little over 16K miles no issues. 7/20 production date and regularly tow 9K over a approximate 8% grade, still pulling as hard as when I purchased it.
I can only speak for my situation, but I'm satisfied with the troubleshooting process to prove it was the wire. See the steps in the dealer invoice.
Long and short of it is, if you get a misfire on cylinder 2, clear codes and swap spark plug wire from cylinder 2 to cylinder 1 and the misfire condition follows to cylinder 1 then it's not either cylinder or either spark plug it has to be the wire.
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