Diesel Lag - Page 2

Diesel Lag

This is a discussion on Diesel Lag within the FCA/EPA 3.0L Diesel Settlement and AEM (Approved Emissions Modification) forums, part of the FCA/EPA 3.0L Diesel Settlement and AEM category; Was called 3 times by the dealer after third trip back to check the lag issue asking if I received it. They sent this questionnaire: ...

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Thread: Diesel Lag

  1. #11
    RAM Sr Member Havanajoe's Avatar
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    Diesel Lag

    Was called 3 times by the dealer after third trip back to check the lag issue asking if I received it. They sent this questionnaire:

    • Questionnaires (For customers);

    Have you experienced any hesitation or acceleration lag on the DS 3LTD? If yes, please describe the conditions
    • Have you experienced any surge? If yes please describe the conditions in your own words
    • Is the Hesitation present only during cold start of the engine or is it present when the engine is warmed up?
    • Is the hesitation present when pressing the accelerator pedal after a complete vehicle stop or accelerating while the vehicle is in motion
    • Is the hesitation present during light acceleration or heavy acceleration
    • Is the hesitation only present when starting the engine after more than 4 hours or is reproducible even when starting the engine after half an hour?
    • Is there any other condition where you have experienced drivability hesitations
    • How many times per day is your vehicle typically started?
    • Does the condition improves after driving for a period of time
    • Did you have an experience driving a diesel vehicle before?
    • What was the last vehicle driven by you before driving this product?
    • Would the customer be willing to have a data logger device installed in the vehicle for the engineers to collect data when the customer experiences the issue
    • Additional comment you would like to make





    Sent from my iPhone using Tapatalk

  2. #12
    RAM Bronze Member Haul N Grass's Avatar
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    It’s all about a cold engine producing excessive soot when the engines COLD, Diesels are combustion ignition, when the combustion chamber is cold it doesn’t fire off a complete burn , creating a wet nasty soot and This is extremely amplified with a really poorly designed EGR system, GDE shuts the EGR off and cleans up the burn to stop this excessive soot production ....Now cleaning the burn through injection cycles and advancing the timing is also where you get the additional fuel economy .....
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  3. #13
    RAM Regular GRIFF4's Avatar
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    Quote Originally Posted by Haul N Grass View Post
    It’s all about a cold engine producing excessive soot when the engines COLD, Diesels are combustion ignition, when the combustion chamber is cold it doesn’t fire off a complete burn , creating a wet nasty soot and This is extremely amplified with a really poorly designed EGR system, GDE shuts the EGR off and cleans up the burn to stop this excessive soot production ....Now cleaning the burn through injection cycles and advancing the timing is also where you get the additional fuel economy .....
    I'd agree with all that. I still question how derating the engine until up to 150 saves from bearing failure. When the gde tune eliminates the lag wouldn't that mean more people jumping on the gas on cold engines would lead to more failures of tuned engines. It seems that tuned engines have less failure rate then none tuned engines. So do you think better tune and less soot with egr shut off is the reasoning for less engine failures. So soot is to blame then ? Just asking your opinion because I personally don't understand how engine temps associated with bearing failure. Bearings are bearings whether in a gas or diesel engines. Gas engines and some diesels get started in cold climates and see some pretty harsh abuse all the time without bearing failure. So to me it seems like a design failure with the derating engine until 150 is a band aid fix without having to admit it's a failure. I am not knocking the engine I love mine and there is more then enough examples of high mileage good motors around. I just don't buy that the lag in accelerating is to limit bearing failure. If it is it's a piss poor one.

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  5. #14
    RAM Rookie troubleshooter's Avatar
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    I live in upstate New York and that 150 degree temperature will take some time to get there when its is zero degrees outside.

    Dave
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  6. #15
    RAM Regular GRIFF4's Avatar
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    Quote Originally Posted by troubleshooter View Post
    I live in upstate New York and that 150 degree temperature will take some time to get there when its is zero degrees outside.

    Dave
    Living in MN I'd agree with that for sure. Plenty of people in Canada with this truck also.

  7. #16
    RAM Sr Member Kyler's Avatar
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    Quote Originally Posted by Captainmal View Post
    All diesels are slow when cold. My old 6.5, the Duramax and even my Cummins suffered when cold. I learned that even idling for a while does not heat them up enough. Then there is also a cold transmission issue if you have an automatic, as all the Ecodiesels are. Always afraid to push the engine much until it is warm. I watch my oil pressure also. When it drops below 50 it seems the coolant temperature is finally above 150*. Then I will try to accelerate to highway speeds. Before that - let the traffic pass. Once warm I just pass them back.

    Never push a diesel hard when it is cold. If FCA sets up the AEM to do that they are just accelerating the learning curve for slow learners and maybe saving engines. Think they should also be publishing that to educate the owners and help them learn to adapt to road situations when cold.
    except the truck had a noticeable lag after the AEM. Now it doesn't.
    Ken
    '16 RAM 1500 ED Bighorn 4x4 - the sexy bright red one
    It's true hard work never killed anybody, but I figure, why take the chance? -- Ronald Reagan

  8. #17
    RAM Rookie EcoJunk's Avatar
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    No matter what, the deception of performance after AEM is not going to fly with me. This truck does not have the power that I purchased it for, its been in the shop more times than any other of my diesel trucks combined...
    Time for FCA to buy this POS back, I've had it with the lies, excuses and down right fraud FCA has committed against all of us. Settlement is a joke, 3k does nothing for diminished value.
    I agreed to the settlement, but since they haven't sent a check and until I cash it, there's still time to file my own...

  9. #18
    Administrator 97hmcs's Avatar
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    Quote Originally Posted by EcoJunk View Post
    No matter what, the deception of performance after AEM is not going to fly with me. This truck does not have the power that I purchased it for, its been in the shop more times than any other of my diesel trucks combined...
    Time for FCA to buy this POS back, I've had it with the lies, excuses and down right fraud FCA has committed against all of us. Settlement is a joke, 3k does nothing for diminished value.
    I agreed to the settlement, but since they haven't sent a check and until I cash it, there's still time to file my own...
    Maybe the truck just has to relearn your driving habits. There's been some who said teir truck is getting back to normal. Plan B get a GDE tune and your truck will be better than ever.

  10. #19
    RAM Jr Member Lifeson's Avatar
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    Quote Originally Posted by 97hmcs View Post
    Yep. Good advice from the tech.
    I do wonder how much good the "intentional lag" is doing, though. I have seen 2017 engine failures reported here.

  11. #20
    Administrator 97hmcs's Avatar
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    Quote Originally Posted by Lifeson View Post
    I do wonder how much good the "intentional lag" is doing, though. I have seen 2017 engine failures reported here.
    I have been seeing a lot of 2018's too both here and other forums. Most at relatively low mileage.

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