5.9 ECM in 6.7 truck running/tuning issues.

ComnRailPwr

ComnRailPwr

New member
I have a customer who converted ecm in his truck for competition reasons. they did the harness themselves. for the life of me I cannot get the truck to run right. I am aware of all the differences with the hard start, tps issues, injector amperage differences ect.. The truck has no throttle response but i think that is due to the way the truck is running or the 6.7 tps. this is my first time doing this swap and i just want to know if i am missing something. this is the 3rd ecm on this truck. 1st ecm had an injector driver issue droping out bank 1. second ecm wouldnt communicate. this ecm acts like the first but hasent thrown any codes relating to injectors. smokes a ton of raw fuel and sounds to be down a few cylinders with a terrible miss. Seems to run smooth on initial start anywhere from 5 - 60 seconds then goes to chit. the truck is far from stock and has 175% over noszzles. i have rueled out any issues besides my tuning and his harness. i cannot figure out why it wants to idle at such high mm3, which drives pulse up which gives me all my white smoke. please if you have expierence with tuning a swap as such let me know if i am lost on this. operating systems i have tried are 409, 602, 202. i have tried with both checksums disabled and enabled. pm me if needed. thanks guys.
 
If you give me your e-mail I can send you a proven tune to try. It always worked for me in helping the ECM "learn" how to fire the 6.7 injectors. you may still experience a miss at time though. This is just my experience on a few trucks.
 
If the TPS % is just staying at 0% your not getting tps signal to the ecm correctly, no point messing with the tune file until you get TPS wired in correctly.

Lavon
 
LAmiller said:
If the TPS % is just staying at 0% your not getting tps signal to the ecm correctly, no point messing with the tune file until you get TPS wired in correctly.

Lavon
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The tips is sweeping to 0-100% as it should when logged. I believe the throttle issue to be due to the way its running.
 
Thanks again for your help Jeff. Been fighting this for a few weeks and several ECM. Finally it runs and I can start making some power and get this thing out of the shop.
 
I am not sure. Loaded his tune and it ran. I just got done creating a csp3 tune for it from the base that Jeff sent and I am going to go try it shortly. I'm thinking it was OS related.
 
I m not with the truck but I think its 09/05 ECM and it is a 6.7 pedal. Went on a drive tonight and the pedal is ridiculously sensitive no matter what I do with the tables. I have a feeling it's going to get a 5.9 pedal before I do anything else with it. Gotta track down a pigtail.
 
ComnRailPwr said:
I m not with the truck but I think its 09/05 ECM and it is a 6.7 pedal. Went on a drive tonight and the pedal is ridiculously sensitive no matter what I do with the tables. I have a feeling it's going to get a 5.9 pedal before I do anything else with it. Gotta track down a pigtail.
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Build date on my ECM is 3-3-06, I tried wiring the pedal both ways as 06 and 07. (They're mirror opposite from 1-6) and still can't get it to read during a live scan, but voltages are changing on the supply/signal with throttle input.

Should be able to snag a pigtail from any 05-06 dodge vehicle.
 
My truck with the 06 ECM has a very sensitive pedal as well. There isn't much you can do to dumb it down. You can bandaid it a bit but for the most part he'll have to live with it.


Sent from my iPhone using Tapatalk
 
ComnRailPwr said:
I m not with the truck but I think its 09/05 ECM and it is a 6.7 pedal. Went on a drive tonight and the pedal is ridiculously sensitive no matter what I do with the tables. I have a feeling it's going to get a 5.9 pedal before I do anything else with it. Gotta track down a pigtail.
Click to expand...

I have a 5.9 pedal and pig tail available
 
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