wilburou812
Newbie
hi looking to find out if the ecm can be programmed for tire size change in a 1997 k3500
I am in central Pa and the engine shop sent ECM to Arizona to be programmed to run the 383 stroker they built me. shop sent a printout of the dyno with ecm to programmer guy. but now program messed up my speedo and tach, 3mph at 25 and 8-9mph at 65. other issues now are ABS, shift points, brake boost, hvac clutch cut out, super rich idle, flat spot in acceleration around 60.. all in all the motor is strong and pulls great. plan is to collect data and send ecm back for better programing. Im learning so many things rely and run on tire size and rear gear ratio.
ive been reading about devices that can program the ecu for tire size, some for rear gear ratio also. the innova unit i bought will not, my mechanics snap on device will not either.
so my question is: can one program the ecm on a 1997 k3500 ext cab 8' box dually 4x4. or is that not an option and maybe program guy changed my rear end gearing for some reason.
thank you
Bill
I am in central Pa and the engine shop sent ECM to Arizona to be programmed to run the 383 stroker they built me. shop sent a printout of the dyno with ecm to programmer guy. but now program messed up my speedo and tach, 3mph at 25 and 8-9mph at 65. other issues now are ABS, shift points, brake boost, hvac clutch cut out, super rich idle, flat spot in acceleration around 60.. all in all the motor is strong and pulls great. plan is to collect data and send ecm back for better programing. Im learning so many things rely and run on tire size and rear gear ratio.
ive been reading about devices that can program the ecu for tire size, some for rear gear ratio also. the innova unit i bought will not, my mechanics snap on device will not either.
so my question is: can one program the ecm on a 1997 k3500 ext cab 8' box dually 4x4. or is that not an option and maybe program guy changed my rear end gearing for some reason.
thank you
Bill
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