Possible Ecu issue or Ecu software issue?? 6.4

[SkimeTime]

2014 ram 2500 original ecu had antifreeze contamination (black pins) also deleted mds with new cam and lifters. Issue is I got a used ecu (was told same year and model, vin # 3C6UR5djoeg272470m and OS of 68153870AI). original ecu vin 3C6UR5CJ7EG287565 and OS of 68153870AM. So here is the run down. With used ecu the the fuel trims get pegged rich, (oem ecu fuel trims are fine fine). I compared the two ecu's and made all the changes I could even the dtc's, how ever after loading updated used ecu to match the oem ecu. Thing still goes fat. possible OS issue or maybe used ecu is junk. all o2 data shows lean and fuel trims rocket just a few mins after starting and after cl kicks in I will post logs and files here shortly. just wanted to get thoughts on this , not new to hp tuners (mostly gm stuff) but new to dodge ram and 6.4 stuff. any thoughts are welcome. and thanks for reading.

[edcmat-l1]

Really is exhausting having to constantly say


POST A TUNE FILE AND DATA LOG!!!!!

[SkimeTime]

Sorry tuning laptop was flashing

[SkimeTime]

I understand I should of had logs before posting, Timing is all over the place with the used ecu, same part numbers on both ecu's. find it interesting the used ecu had dtc's for forced induction stuff active, so who knows what that was all about. i turned off those also noticed extra crank sensor dtc's that where not active in old ecu as well but matched the ecu's as best as i could.

[edcmat-l1]

First off, they're not identical tune files. One has the MDS disabled.

That being said, use your scanner controls and reset all adaptives on the new/used ECM and run it again. Longer this time. Much longer. 2 minutes isn't going to tell you anything.

[SkimeTime]

I don't think one needs a 462 min long log to know if something is going on with this used ecu. don't feel mds has anything to do with the fuel trims or what ever is causing this issue. Really doesn't matter. how ever just to clarify both ECU's are now flash with out mds and data logs for both of them, As you can see ignition timing is not happy nor the fuel trims max out lt and st in less than 16 seconds in the used ecu. And yes all adaptive's where cleared before unit was started.

[edcmat-l1]

Righto! Good luck to you....

[Andrew Woodward]

I am having a similar issue tuning a 2011 ram 1500 except mine is pegging rich. Just finished a complete engine rebuild stock other than MDS Delete and TSP cam, 214/222.

On first start when cold it will fire then run for a minute. Then pull 15% and then peg at 33% and die a minute later. Originally I could restart it to check my fuel trims with no change to them. Tuning in VE with NN disabled. First time I pulled 20%. Still pegging at 33%. Then pulled 30%. Pegged at 33%. After that I have not been able to get it to run long enough to get good data. After it quite starting I reversed my files and worked back the other way but to no effect. Still doesn't want to start. It will only start after that process when it has cooled off completely. I also have an Autel Maxisys that is very capable and it will not hook up or recognize this thing so I'm starting to think bad ECU. Also double checked grounds and didn't find an issue.

[LilSick]

did you degree the cam?

might wanna add ex centerline to your log

[Andrew Woodward]

The cam is designed to work with the stock phaser with a lockout. I got the trims working though. It was a corrupt file. Made a new one from stock and got them withing 5% now at idle. The warm start is what I'm still trying to figure out on this one. Starts decent when cold but have to give it some pedal to start warm so I think it needs more throttle %. I tried pulling 10% from Aircharge to Torque table which didn't seem to make a difference but there is no inverse table like on the Hellcats. I have tuned quite a few Dodge cars but this is my first truck. Might just have to mess with it till I get it right.

[LilSick]

oh ok i just cannot image locking a phaser and not degreeing the cam to determine where it ended up

[Andrew Woodward]

I definitely wouldn't use it for a drag car but works pretty well for a basic street engine. The cam is just a supplement to the MDS delete on this build.

[LilSick]

a 'basic street engine' is a 4 stroke reciprocating engine

right?

the camshaft IS a engines mechanical brain

[veeefour]

oh ok i just cannot image locking a phaser and not degreeing the cam to determine where it ended up

Well when its a VCT lockout it stays at 0 for sure m8. You cant go wrong here. No need to degree anything.

[LilSick]

it stays at 0 for sure

fer shur

wow...

[veeefour]

fer shur

wow...

There is a big difference between "for" and "lil"...lol

[LilSick]

maybe dunno...

*there is no difference between "for" and "0" if ya did not check the centerline before buttoning up

[veeefour]

maybe dunno...

*there is no difference between "for" and "0" if ya did not check the centerline before buttoning up

Oh thers is...you cant just squezze a square into triangle...you know just like those baby toys teach...