Loss of Power in Manual Gear Selection Mode
Thread Starter
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Mountain Pass
Joined: Jul 2018
Posts: 158
Likes: 2
From: Northern California
Loss of Power in Manual Gear Selection Mode
Our 2019 F350 Diesel has lost power twice while towing our 8K 5th wheel when on a downgrade passing large semis. A quick switch to "Auto" restores power. Any suggestions or ideas? This is no time to have control issues.
Regards
Bill
Regards
Bill
Tuned
Joined: Jul 2011
Posts: 396
Likes: 7
From: Wherever the RV is parked
How many RPM's are you turning when it happens? The scenario I've experienced is Tow/Haul + Exhaust Brake, in Auto mode, going
downhill, truck has shifted to 4th, engine turning 3500-3800 rpm. As the grade levels out I step on the accelerator and the pedal is dead.
If I switch off Tow/Haul it will then upshift and I can put if back into Tow/Haul. Sometimes, even if I can accelerate, it still won't upshift on
it's own.
downhill, truck has shifted to 4th, engine turning 3500-3800 rpm. As the grade levels out I step on the accelerator and the pedal is dead.
If I switch off Tow/Haul it will then upshift and I can put if back into Tow/Haul. Sometimes, even if I can accelerate, it still won't upshift on
it's own.
Hotshot
Joined: Oct 2015
Posts: 19,733
Likes: 12,876
From: Wyoming
How many RPM's are you turning when it happens? The scenario I've experienced is Tow/Haul + Exhaust Brake, in Auto mode, going
downhill, truck has shifted to 4th, engine turning 3500-3800 rpm. As the grade levels out I step on the accelerator and the pedal is dead.
If I switch off Tow/Haul it will then upshift and I can put if back into Tow/Haul. Sometimes, even if I can accelerate, it still won't upshift on
it's own.
downhill, truck has shifted to 4th, engine turning 3500-3800 rpm. As the grade levels out I step on the accelerator and the pedal is dead.
If I switch off Tow/Haul it will then upshift and I can put if back into Tow/Haul. Sometimes, even if I can accelerate, it still won't upshift on
it's own.
Thread Starter
|
Mountain Pass
Joined: Jul 2018
Posts: 158
Likes: 2
From: Northern California
How many RPM's are you turning when it happens? The scenario I've experienced is Tow/Haul + Exhaust Brake, in Auto mode, going
downhill, truck has shifted to 4th, engine turning 3500-3800 rpm. As the grade levels out I step on the accelerator and the pedal is dead.
If I switch off Tow/Haul it will then upshift and I can put if back into Tow/Haul. Sometimes, even if I can accelerate, it still won't upshift on
it's own.
downhill, truck has shifted to 4th, engine turning 3500-3800 rpm. As the grade levels out I step on the accelerator and the pedal is dead.
If I switch off Tow/Haul it will then upshift and I can put if back into Tow/Haul. Sometimes, even if I can accelerate, it still won't upshift on
it's own.
Mountain Pass
Joined: Dec 2018
Posts: 193
Likes: 15
From: Fort Collins
annoyances...
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Hotshot
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Thread Starter
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Mountain Pass
Joined: Jul 2018
Posts: 158
Likes: 2
From: Northern California
Has anyone complained to a dealer? We were convinced something was wrong with the truck. Losing power on a grade in traffic is definitely a safety issue. Scared the living daylights out of me and alarmed my wife. I we were at home we would definitely be at the service window raising a fuss. Right now we are out of service reach.
Bill
Bill
Last edited by BillRes2; May 9, 2019 at 07:47 PM. Reason: additional thoughts
Hotshot
Joined: Oct 2015
Posts: 19,733
Likes: 12,876
From: Wyoming
Has anyone complained to a dealer? We were convinced something was wrong with the truck. Losing power on a grade in traffic is definitely a safety issue. Scared the living daylights out of me and alarmed my wife. I we were at home we would definitely be at the service window raising a fuss. Right now we are out of service reach.
Bill
Bill
Thread Starter
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Mountain Pass
Joined: Jul 2018
Posts: 158
Likes: 2
From: Northern California
Were currently 1500 miles into a 2500 mile road trip and now have had 2 serious instances of surging, and loss of power. Were towing a 8K 5th wheel. Ours seems to be related to TOW_HAUL and our ADAPTIVE CRUISE CONTROL. There is another thread where this is discussed. It can be searched I'' try to post the link later.
Less than 7K on the beast.
Regards
Bill
Less than 7K on the beast.
Regards
Bill
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