Dead Pedal in 20 or below - Dodge Cummins Diesel Forum
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post #1 of 10 (permalink) Old 02-13-2019, 02:12 PM Thread Starter
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Dead Pedal in 20 or below

So where to start....2012 2500 6.7 stock.
4wks ago -6 truck wont go over 27 mph 1500rpms....no codes. Later p606 and p562.
Weather warmed up no issue. Cleared codes was fine 30ish .
Got super cold for two days -40 in upstate Illinois. I started the truck a few times and was plugged in at block heater. Threw CEL I tried to drive. Dead pedal again p606 p562 also found codes for 249f DPF, low fuel rail pressure and O2 sensors harness. Cleared codes drove for two hours seemed better 28 weather.

Reading info here I found that it's probably not the ecm but batteries or grounds. 249f dpf regen didnt happen because she was plugged in and the extreme cold it couldn't get to temp idling my mistake. IE dont use remote start!

Went to interstate batteries 2 days ago for a load test. Found that one oem( both 7 yrs old) battery was a rock star the other had 2 dead cells. Replaced both. It was 30 yesterday ran like a champ! No issues. 16 today tried to drive right back to square one dead pedal won't go over 1500 but can get up to speed gradually with a lil feathering of the pedal and wham CEL again. Fuel is treated with stanadyne. Fuel is always bought from the same station and pump. Fuel filter has 6200 miles on it.

I also spoke with Brandon @ HPP said he knew of a person same issues got cold truck got pissy...new ecm $$$ and warm weather no issues. Another cold spell problem resurfaced. He replaced batteries and issue resolved permanently.

Next is to load test the new batteries maybe I got a lemon.
Then check alternator...grounds & ECM.

Any further input would be appreciated.

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post #2 of 10 (permalink) Old 02-13-2019, 02:14 PM Thread Starter
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Forgot mileage 59,[email protected]@
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post #3 of 10 (permalink) Old 02-13-2019, 07:57 PM Thread Starter
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Well turns out two unrelated issues occured at the same time. Low voltage and fuel issue. Low voltage related codes were fixed with new batteries. But the secondary resolved itself with warmer weather making me think all was good. Not so..I must of got some ty fuel.. filter was clogged up and wouldn't even let the bowl drain. Replaced and she's a beast again.
You may all laugh at me now.

Mods delete thread if you wish thanks.
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post #4 of 10 (permalink) Old 02-13-2019, 08:55 PM
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What was the filter clogged with? Just debris?

--2015 2500, Crew Cab, Long Bed, 4x4, G56, Maximum Steel
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--2006 2500 4x4 4 door long bed auto, 8" BDS, 37s
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post #5 of 10 (permalink) Old 02-13-2019, 08:56 PM
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What was the filter clogged with? Just debris?

--2015 2500, Crew Cab, Long Bed, 4x4, G56, Maximum Steel
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--2006 2500 4x4 4 door long bed auto, 8" BDS, 37s
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post #6 of 10 (permalink) Old 02-15-2019, 10:47 PM
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Water in the filter freezing up?

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post #7 of 10 (permalink) Old 02-16-2019, 10:09 AM
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If you live/drive in IL, you might want to consider adding 22oz of Power Service with every fill up. White bottle in Winter, Silver bottle in Summer.
Some fuel stations are less than honest with what they sell, and poor grade, watered down fuel happens. Speaking from experience here.
If you are already gelling, and that sounds like what you are describing, add 20 oz of the 911 (Red bottle).
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post #8 of 10 (permalink) Old 02-16-2019, 02:12 PM
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Here in north Dakota I've the best luck with Howes Diesel treat.
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post #9 of 10 (permalink) Old 02-16-2019, 05:53 PM
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Howes is what most truckers swear by. I've used power service winter, xpd winter, and howes... All of them work if treated to the correct amount. Read the bottle. I had a gelling issue due to the cold here in MT, using #2 winterized fuel and not adding enough treatment (and I knew I did but forgot). If you monitor rail pressure when it's like that you'll see it bottoming out to 2-3 KPSI which is what causes your dead pedal...additionally you're getting a ton of soot when it can't keep up with the rail pressures so that'll cause havoc with the DPF.
So yeah you were plugging up your filter and that caused the dead pedal aaaand likely the DPF code. And Definetly the P0606 low rail pressure code. It takes quite a bit for it to set that code I found out. Took me a couple daysto get mine right. Had an absolutely full tank so adding 911 to the tank wasnt helping. Driving around where it could barely hold 8KSI on light throttle.
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post #10 of 10 (permalink) Old 12-17-2019, 10:44 PM Thread Starter
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Hey sorry guys life got in the way hip surgery and I never came back to this thread.
I was running stanadyne. No debris just normal filtering of fuel.
I think with not accounting for idle time the filter was due for a change and the super cold temps made it much more difficult for fuel to flow. I wasn't gelled just replaced the filter and the magic happened. Now I try to keep better track of idle time along with switching to Opti Lube xpd....might have remedied some other issues too


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