Diablosport Forums

My truck is a 2015 Ram 2500 CC 4x4 with the 6.4L Hemi. I just recently installed the DiabloSport modified PCM on my truck so I could finally tune it. I am using a Trinity. I have ran the preloaded 93 and 91 Performance tunes and have to say that I am pretty disappointed. I have had other trucks that were tuned, so this isn't my first time.

The 93 and 91 tunes actually felt more sluggish than the stock tune. The stock tune feels to have better throttle response and the shift schedule with the stock tune seems to have a lot less bouncing between gears/gear searching than in the 93 and 91 tunes. I don't expect the preloaded tunes to feel like custom tunes I had on my old truck, but I also don't expect to feel like I have de-tuned my truck when I am putting in a tune that claims to increase HP and TQ. I haven't and don't have a way to put my truck on a dyno to know for sure if the stock is performing better than the preloaded tunes, but it for sure feels like something isn't right.

Has anyone else tuned their 2500 with the 6.4L and noticed similar results?

certainly not a common complaint, have you tried the 87 tune just to be sure its not a poor fuel quality issue in the vehicle.?

mikel wrote:certainly not a common complaint, have you tried the 87 tune just to be sure its not a poor fuel quality issue in the vehicle.?

I can give that a shot. I know that's always a possibility, but I've always filled up at the same station in town (only one with 93 Octane) and I have never had troubles before with previously tuned vehicles and their fuel. Would there be any logging I could do to show if it's bad fuel or to even compare the different tunes installed on my truck?

Yes, recording a log with the default pids will show us if there is any knock, etc.

Hi I also have a problem like that.
I was looking for better towing and it seems like its not doing much for me.