Any Common 6.2L problems?
Elder User
Joined: Mar 2017
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I'll bet the NHTSA would not think this is "OK", even if it's "normal'. The vehicle essentially accelerates past the intention of the driver. When I let off the accelerator pedal, I expect the vehicle to no longer accelerate! But that's not what happens; it continues to accelerate (all the way to red-line!). The only way to make it come back down is to step on the brake. But as soon as you step back on the "gas", up it goes to the extremely high rpm.
Normal? Maybe under these conditions.
Acceptable or safe? Nope.
Can I tolerate it? Probably so, as it would be rare that I'd ever intentionally be in a cold-start/manual/4L condition. However, there are many that might end up in a cold-start/manual/2H condition.
Honestly, not trying to start a panic here, but this probably ought to be reported to NHTSA as a concern for them to investigate.
Normal? Maybe under these conditions.
Acceptable or safe? Nope.
Can I tolerate it? Probably so, as it would be rare that I'd ever intentionally be in a cold-start/manual/4L condition. However, there are many that might end up in a cold-start/manual/2H condition.
Honestly, not trying to start a panic here, but this probably ought to be reported to NHTSA as a concern for them to investigate.
New User
Joined: Dec 2018
Posts: 17
Likes: 0
Hey, all of you 6.2L diehards. I'm still waiting to have a Ford field service engineer inspect my truck for the unintended acceleration described in earlier posts. I have contacted the BBB Auto Line and the NHTSA along with Ford customer service. My most recent response was from the Ford RAV program, politely stating they will assist in getting an appointment with the Ford field service engineer. So far this unintended acceleration can be verified in (1) 2017 F250 XL 4wd reg cab FX4 (2) 2017 F350 XL 4wd reg cab FX4 (3) 2018 F250 XL 4wd super cab LB. It did not show in a XLT, so perhaps XLs are the carriers?? Please try to duplicate this with your vehicle as carefully described in past posts and post your results here. The more info I can give the engineer, perhaps the easier it may be to repair. Thanks to all in advance.
Elder User
Joined: Mar 2017
Posts: 764
Likes: 30
Hey, all of you 6.2L diehards. I'm still waiting to have a Ford field service engineer inspect my truck for the unintended acceleration described in earlier posts. I have contacted the BBB Auto Line and the NHTSA along with Ford customer service. My most recent response was from the Ford RAV program, politely stating they will assist in getting an appointment with the Ford field service engineer. So far this unintended acceleration can be verified in (1) 2017 F250 XL 4wd reg cab FX4 (2) 2017 F350 XL 4wd reg cab FX4 (3) 2018 F250 XL 4wd super cab LB. It did not show in a XLT, so perhaps XLs are the carriers?? Please try to duplicate this with your vehicle as carefully described in past posts and post your results here. The more info I can give the engineer, perhaps the easier it may be to repair. Thanks to all in advance.
It might be worthwhile to start a new thread in the 2017+ SD forum for this specific runaway acceleration issue. I doubt it's getting much traction here only because the 6.2L sub-forum is not nearly as popular as the 6.7L and the main 2017+ SD ones. Not even sure at this point if it's only the 6.2L trucks; does it also happen to diesels?
I did report my issue to the NHTSA online; have not heard from them. Have not spoken with my dealer yet either, but I might next week, as I have to take the truck in for an unrelated door lock malfunction issue.
FTE Leadership Emeritus
Joined: Jul 2002
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From: Long Island USA
Just a friendly reminder, but before it happens (and it might), please re-read the guidelines when it comes to legal actions, section 8: https://ford-trucks.com/guidelines.html
Senior User
Joined: May 2018
Posts: 452
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From: Corpus Christi TX
This looks to be a good thread for my 2017 SD 6.2L problem. So, I bought a new 2017 F250 XL reg cab 4wd 6.2L in July '17. One day I was carefully backing up in 4wd Lo from a cold start and had to rev it above 1500 to get it moving. All of a sudden the truck started increasing in speed (and revs) by itself without my foot on the accelerator. Yes, I was able to brake but that episode was scary and sure got me thinking. It took me a while, but I was able to replicate the unintended acceleration so the Ford dealer could experience the problem and the mechanic had never seen anything like it. Here is when it always happens: must be a cold start (sitting 2-3 hours will suffice), immediately put in 4wd Lo M (manual mode) first gear, rev to 1500-1800 and truck takes off by itself reaching +4000 rpms. Also will show in 4wd Hi or 2wd M (manual mode) first gear, same rpm data, but you need a longer straight away to experience. After about 3-5 minutes, it no longer does this and everything is normal. As said before, you can brake safely at any time and repeat if within the time frame. So, the truck was in and out of the dealer many times between Nov '17 and Jun '18. They put a new computer in, almost every sensor, intake manifold, transmission, transfer case and some other parts. Finally, in Jun '18 the dealer told me they can not fix it and unfortunately it is an unintended engineering result of my truck as configured. So, I went through the RAV program (reacquired vehicle program or the lemon law dept.). In Aug '18 I received a check for the entire cost of the truck plus tax and DMV fees and an extra 'coupon' good for any Ford vehicle. They only reduced the amount by the mileage I had on the truck ~2,300 using a formula. Well, I purchased a new '17 F350 reg cab 4wd XL 6.2L configured somewhat differently in Aug '18 about 1,000 miles from home. Believe it or not, the truck has the exact same issue. I explained the problem to my local dealer (same one from the '17 F250) and they said this is normal and no repair is needed nor did they even want to see it. I called Customer Service who also said this is normal. Wow, a vehicle with unintended acceleration is normal! Finally the dealer agreed to see it where the same mechanic verified the issue, but they insisted it is normal and charged me $190 as they claim it is not a warranty issue. I am now working with the BBB (Better Business Bureau) Auto Line who work as mediators between the customer and the manufacturer. I don't want to go through the RAV program again, but want some kind of compensation to live with the problem and hope for a repair in the future. The problem is pretty easy to avoid, but I wonder how many 6.2L trucks out there have this same issue. If you have a '17 or '18 SD 6.2L please try to replicate as described. It might be reg cabs only or XLs only or... Both trucks do have the FX4 option with locking rear. If yours does this, have a dealer verify.
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Elder User
Joined: Mar 2017
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Just a friendly reminder, but before it happens (and it might), please re-read the guidelines when it comes to legal actions, section 8: https://ford-trucks.com/guidelines.html
However, reporting vehicle problems such as this unintended acceleration to the NHTSA is not an action of suit; it's just reporting an issue. I'm not taking legal actions nor am I giving legal advice. I'm reporting a problem to a governing entity for investigation.
So I respectfully accept your warning, but ask if you think I've crossed a line?
More Turbo
Joined: Oct 2016
Posts: 616
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From: Ofallon Mo
Well I guess I am just way too simple, but why don't yall just let the truck warm up for a few minutes before driving, and presto! No more issue. Or don't use manual mode for first few minutes if not willing to let the truck warm up for a few minutes? Obviously the problem is related to the computer seeing operating temperatures out of bounds and while that might be considered a minor glitch, it is easily remedied by just letting it warm up first? Gas engine does not take very long to warm up like the diesels. Gotta pick your battles etc etc. This seems like a total non-issue to me. A little COMMON SENSE can go a long way just sayin'...
New User
Joined: Dec 2018
Posts: 17
Likes: 0
Hey guys, this is a follow up of my 'unintended acceleration' issue with my '17 F350 6.2L, original info/details in Dec 2018 on this forum. I have decided to give up trying to convince Ford they have a potentially dangerous unintended acceleration issue, albeit only shows in certain circumstances that very few people would ever experience. I had two different dealerships with different FSEs tell me it is completely normal as they did experience the issue. They are not denying it's existence, just that it is (in their words) an 'acceptable characteristic'. I dealt with FCS and also BBB autoline. The BBB autoline folks were very helpful and act as mediators. Since Ford claims this is 'normal' my only choice to continue fighting this was to go to arbitration (through BBB autoline, no cost to me), but I would have to travel ~300 miles and deal with numerous court appearances, some with the truck. I bowed out of doing this and reluctantly gave up. The issue really doesn't effect my driving as I am aware of how to make it happen. I hope no one gets hurt because of this at sometime in the future. If I ever hear of an accident caused by this I will tell my story to prove Ford knew about it. All else well with the truck.
New User
Joined: Aug 2019
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2011 6.2L w/65,000 miles
Desperate need of help. I have a 4x4 LB 6.2 2011 F250 XL automatic. Bought the truck with 56k and now at 65k.
Truck required the key to turn twice in order to start shortly after buying. The first turn the key would bring all electronics and gauges on but engine did not fire second time the truck would start without a hitch. Over time the frequency of that occurring increased.
I got a full tune up after talking to a ford mechanic hoping it would help. Problem persisted and then evolved to the truck randomly stalling while driving in “drive”. Additionally the starting problem evolved to the engine starting, immediately stalling then after turning over again runs.
Had my battery and alternator tested and both are perfect. I paid a ford mechanic to tell me to check the fuel pressure but that didn’t tell much. My initial thoughts were pcm relay, ignition switch, or starter solenoid because of stall at key turn but then being fine. After time I’m thinking could be the wiring harness by the brake, fuel pump, or pcm. I am replacing all fuses and relays to see if that fixes the issue. I bought the truck without the horn working or the ambient air temp working. Because of these other issues I think it could be an electrical issue. I additionally only get about 9mpg but do drive on 33 mud tires.
Any help would be so much appreciated, I have to get this figured out.
Truck required the key to turn twice in order to start shortly after buying. The first turn the key would bring all electronics and gauges on but engine did not fire second time the truck would start without a hitch. Over time the frequency of that occurring increased.
I got a full tune up after talking to a ford mechanic hoping it would help. Problem persisted and then evolved to the truck randomly stalling while driving in “drive”. Additionally the starting problem evolved to the engine starting, immediately stalling then after turning over again runs.
Had my battery and alternator tested and both are perfect. I paid a ford mechanic to tell me to check the fuel pressure but that didn’t tell much. My initial thoughts were pcm relay, ignition switch, or starter solenoid because of stall at key turn but then being fine. After time I’m thinking could be the wiring harness by the brake, fuel pump, or pcm. I am replacing all fuses and relays to see if that fixes the issue. I bought the truck without the horn working or the ambient air temp working. Because of these other issues I think it could be an electrical issue. I additionally only get about 9mpg but do drive on 33 mud tires.
Any help would be so much appreciated, I have to get this figured out.
FTE Leadership Emeritus
Joined: Jul 2002
Posts: 42,561
Likes: 423
From: Long Island USA
Monitor the fuel pressure while it's doing this. Your truck should have a fuel pressure PID to read with a scanner. You can buy a cheap OBD-II interface w/Bluetooth and connect it to an Android phone or tablet. if, while running, you see the fuel pressure drop off and then stall, you'll know it's fuel related.
Did you try kicking the parking brake lever? Yeah, I know this sounds weird, but the earlier 6.2 F-series had problems with the electrical connector that's mounted on the parking brake bracket causing stalling.
Did you try kicking the parking brake lever? Yeah, I know this sounds weird, but the earlier 6.2 F-series had problems with the electrical connector that's mounted on the parking brake bracket causing stalling.
Senior User
Joined: Feb 2005
Posts: 312
Likes: 1
I can only speak for myself, but I have 70,000 miles on my 6.2L and it hasn't had any problems yet. The only thing I really hate about the 6.2L is, is that it gets crappy fuel mileage, even without a trailer. You'd think that a 21st. century fuel injected V8 motor would have greater mpgs as a carbureted V8 from the 70's, but it doesn't.