Dead Pedal revisted 2013+

[Mike Wenrich]

No mix up. We have a very distinct problem that varies between trucks and years. Why that is the case baffles me. You would think all of them would be programmed the same. And that is likely the intent and what RAM thought they were doing. Since some have no issue and others have moderate to severe issues there is a problem with the programming. But RAM won't address this and its likely that has something to do with emission regulations or their ability to reprogram. Or even the desire to take this on. After all, a fix would cost them money. With some 10 recalls already on my truck maybe they think that's enough money spent to keep me happy.

 

[SnoKing]

No mix up. We have a very distinct problem that varies between trucks and years. Why that is the case baffles me. You would think all of them would be programmed the same. And that is likely the intent and what RAM thought they were doing. Since some have no issue and others have moderate to severe issues there is a problem with the programming. But RAM won't address this and its likely that has something to do with emission regulations or their ability to reprogram. Or even the desire to take this on. After all, a fix would cost them money. With some 10 recalls already on my truck maybe they think that's enough money spent to keep me happy.

Have you filed a complaint on safercar.gov? I was just on the site and there are not very many people that have taken the time to file a complaint or not all of them get listed so you can search for them.\

Here is a sample complaint. There of 6-12 for each model/year. Why are there not hundreds and thousands of these complaints if we want it fixed?

December 29, 2016 NHTSA ID NUMBER: 10938402
Components: FUEL/PROPULSION SYSTEM
NHTSA ID Number: 10938402

Incident Date October 2, 2015

Consumer Location AURORA, CO

Vehicle Identification Number 3C6UR5GL7FG****

Summary of Complaint

CRASHNo

FIRENo

INJURIES0

DEATHS0

ON 6.7L CUMMINS DIESEL THERE CAN BE AN UNPREDICTABLY LONG ( UP TO 2 SECOND) DELAY BETWEEN WHEN THE ACCELERATOR IS PRESSED AND WHEN THE TRUCK ACTUALLY BEGINS TO ACCELERATE. THIS IS NOT TURBO LAG (WHICH MAY LIMIT THE AMOUNT OF POWER UNTIL THE TURBO SPOOLS UP). THIS IS NOT A STUMBLE. THIS IS AN ACTUAL DELAY IN THE COMPUTER APPLYING FUEL TO THE ENGINE. IT IS TOTAL DEAD TIME AS IF THE ACCELERATOR WAS NOT PRESSED AT ALL. IT HAPPENS UNDER THE WORST OF CONDITIONS, WHEN YOU NEED HARD ACCELERATION AND NEED IT NOW. IT HAPPENS WHEN YOU ATTEMPT TO ACCELERATE QUICKLY, ESPECIALLY WHEN YOU WERE COASTING OR HAD JUST LET OFF OF THE PEDAL. THESE ARE CONDITIONS THAT OFTEN OCCUR IN TRAFFIC WITH MANY OTHER VEHICLES NEARBY. THE LONG DELAY BETWEEN THROTTLE APPLICATION AND ENGINE RESPONSE IS EXTREMELY DANGEROUS. MY TRUCK HAS THE LATEST "FLASH" FROM THE DEALER, IT IS RUNNING THE MOST UP-TO-DATE FIRMWARE AVAILABLE FROM THE DEALER. DEALER STATED THAT THEY KNOW ABOUT THE ISSUE BUT HAVE NO PLANS TO FIX THE ISSUE.

 

[DonFitzwater]

I thought my 68rfe trucks were bad.............my Aisin is far worse. Good thing I can "drive around" it. For a normal person that expects the go pedal to work when pressed, it's quite unnerving to drive in traffic, especially with a load.

 

[SnoKing]

I've been watching SnoKings responses for years now to this problem and frankly he doesn't have a clue what we are going through. He has good advice at times but this is not one of them. He can reproduce the problem because it's built in to a lesser degree than ours. He does not drive the roads we do. And he does not have as severe a problem. The trucks ARE different. Some do not even have the problem. So I wish he would opt out of this discussion because it's bad advice. It's good advice if all you ever do is gently roll into the speed. Yes I can get mine to do that too. But I would be road kill in a heartbeat if I drove like that in kalifornia. I have seen no indication this is a learning transmission. Maybe the 68 is but not the Aison. It has not learned my style what-so-ever. And I drive the same roads every day. We have a severe problem, documented by RAM techs in my case but they will not reprogram for us. Really sucks considering what a great truck this could have been.

So give me the year and model 2500 or 3500 and your location(city/state) and I will see it I can find your complaint on safercar.gov. As far as I can see, not all of those that have posted over the years about this issue are filing complaints with the government agency that could direct RAM to fix this.

 

[Cummins2014]

Modify your driving style and it will go away for the most part. If you want to drive a go/stop jack rabbit go buy one. If you drove my truck you would say it has trouble dead pedal issues, if I drove yours dead pedal would be gone, unless I wanted to create it.

The dead pedal is a dead pedal, your truck or mine . I have pulled out from a busy intersection ,got on it, then let off, only to realized I need to get back on it, and yes there is the dead pedal. We can't always dictate babying the throttle, there are times. Yes for the most part I have learned not to get caught with my pants down on this issue.
Never owned a vehicle with this problem

 

[SnoKing]

The dead pedal is a dead pedal, your truck or mine . I have pulled out from a busy intersection ,got on it, then let off, only to realized I need to get back on it, and yes there is the dead pedal. We can't always dictate babying the throttle, there are times. Yes for the most part I have learned not to get caught with my pants down on this issue.
Never owned a vehicle with this problem

And have you file a complaint on safercar.gov?

 

[Mike Wenrich]

I did file a complaint. Long ago and that might be documented earlier in this thread. There was another thread some time back on this issue as well. I filed the complaint AND had a factory tech ride along with me while he was on a factory computer. This was also mentioned earlier. He said mine was bad with a 3-5 second dead pedal delay (scoffed at by others on this forum) and that some are worse than mine. I've done all I can do except unload the truck which would cost me a bundle. My bad for buying the truck when I knew it had the delay when I test drove it. Had a hard time finding color, bed length, Aison, Big Horn, etc. Thought it could adjusted out. RAMs bad for not fixing it. I also had driven over 200 miles to look at the truck and it otherwise was everything I wanted. Lost my head for a moment and the rest is history as they say.

 

[Cummins2014]

And have you file a complaint on safercar.gov?

No I have not. Let me ask ,do you think by now they are fully aware of the issue, and intend to do nothing ? It appears that way . Have no idea when they started building them to do this. Mine is over 5 years old now.

 

[AH64ID]

It’s not about FCA being aware of the issue, it’s about them being forced to do something about it. More complaints will help force the issue.

 

[Cummins2014]

It’s not about FCA being aware of the issue, it’s about them being forced to do something about it. More complaints will help force the issue.

Wouldn’t it just be programming . I really don’t know much about it, just that it’s an issue. Once I realized it did what it does , it has not been an issue. It’s sound like some are worse then others

 

[AH64ID]

Yes it should just be programming, but fixing it may cause emissions issues. Just an guess as to why it hasn’t been fixed.

Some trucks do seem to react different, but it’s also hard to rule out driver differences as the variance. Meaning all trucks might act the same under the same circumstances.

 

[Cummins2014]

Yes it should just be programming, but fixing it may cause emissions issues. Just an guess as to why it hasn’t been fixed.

Some trucks do seem to react different, but it’s also hard to rule out driver differences as the variance. Meaning all trucks might act the same under the same circumstances.

Thanks, I just know it’s coming if I drive a certain way , so now I seem to avoid it . I was taken by surprise the first time it happened , not a good feeling at all .

 

[TCDiesel]

These little restrictors (7) are in every 6.7 Rail from 2007.5 to 2018 they play a huge part and I mean HUGE part in why these years have DP problems.... The intake play's another part and OEM TQ plays another...The 2007.5 -18 Rail just sucks. 2019 Cummins change and went back to a cast piece (rail) without the restrictors change the entire intake and eliminated most of Dead pedal issue's.

The question one must ask, If The DP could have been resolved with programing Cummins / Ram would have done that years ago. It required design and Hardware changes and that cost $$$$

 

[TFucili]

Todd, what do they claim is the purpose of a restrictor/orifice in a pressurized rail? Pretty odd.

 

[kthaxton]

When I filled out the info on safecar, the questions were structured in a way that assumes there was an accident. If there weren't any accidents directly related to the issue being reported, I wonder if they ignore it?

 

[TCDiesel]

Todd, what do they claim is the purpose of a restrictor/orifice in a pressurized rail? Pretty odd.

They (Bosch) claim its to reduce the in pipe hammering (Hydraulic Shock) that the CP3 Produces to increase injector life.

Also remember your Pressure sensor does NOT measure the pressure ,it measures the vibrations created by this shock and translate to PSI and coverts this to Volts, the voltage is sent to the ECM, the ECM controls everything and use inputs form several sensors to make adjustments to fuel Injection events

Those rail Caps/Plugs that Grocery seller promoted create rail Spikes above 40,000.00+PSI Your rail sensor is NOT calibrated to even measure spikes.

This guy does a good job at explaining the event in simple terms.

https://www.youtube.com/watch?v=xoLmVFAFjn4

 

[Mike Wenrich]

TC, your comments are enlightening and if they solved the problem on the '19 then at least RAM was looking at the issue. Without advertising that I might add. But it seems the Aison equipped trucks are affected to a greater degree. When it first became apparent how many were having the problem the folks with 68 trans said they were not having the problem. Gradually a few of those did as well. So it seems programing might be a large part of the problem. Using the term restrictors also makes my spider sense go into orbit but still, why not all the trucks rather than some. You likely have the answer and maybe there is another ingredient in the mix that makes this such a miserable issue for us. And you mention Cummins making the change. Someone I forgot all about with this. I was blaming blaming RAM for inaction. Possibly there is another suspect?

 

[TCDiesel]

I've modded Both of My Aisin69 (Rails) and they just get right up and haul butt, There are 1000s of modded Rails through out N/A , I have never received a complaint about DP after the Mod.

 

[TCDiesel]

Mike it took 12 years for the changeover, Kinda Said IMO.

 

[Wiredawg]

Tom,

Still haven't tested my truck yet. Mine will do close to the same yours is doing. Towing heavy, I turned up hill taking RV in for service, applying light accelerator., then let off while someone coming out, the depressed accelerator again. You'd thought there would transmission parts laying on the ground. Had BIL (Ford guy) with me, of course. I had written it off to programming to reduce slippage and TQ mgt. I know when starting out, if I press, let off, and press again. I'm going to get a hard 2nd gear shift.

Taking mine out today to log systems while doing max acceleration tests before adding the Edge Amp'd Accelerator Booster.

Don't get me wrong... I'm 99% happy with my truck... just work'n my max acceleration procedure.

Cheers, Ron