mandersdiesel Posted August 11, 2017 Share Posted August 11, 2017 Hello I have a 96 CH e7 427 vmac 1. The ecm went bad and I am trying to replace it with a used ecm from another truck that had an e7 350 vmac 1. I am able to download both factory files from Mack central server but when I go to reprogram the replacement ecm and it will not let me because the vin numbers don't match. Is there any way to clear the replacement ecm to reprogram it with the e7-427 or short of finding a e7-427 used ecm or converting it to a vmac 2 how can I flash this ecm ? Any help would be appreciated. thanks Quote Link to comment https://www.bigmacktrucks.com/topic/50745-trying-to-replace-vmac-1-ecm/ Share on other sites More sharing options...
fjh Posted August 11, 2017 Share Posted August 11, 2017 Nope the vins got to match Quote Link to comment https://www.bigmacktrucks.com/topic/50745-trying-to-replace-vmac-1-ecm/#findComment-377209 Share on other sites More sharing options...
fjh Posted August 11, 2017 Share Posted August 11, 2017 (edited) Your best to buy a recon ecu they come wiped clean so you can start over how ever they ain't cheap Edited August 11, 2017 by fjh Quote Link to comment https://www.bigmacktrucks.com/topic/50745-trying-to-replace-vmac-1-ecm/#findComment-377210 Share on other sites More sharing options...
Mackpro Posted August 11, 2017 Share Posted August 11, 2017 I dont think you can reflash a VMAC 1 and reprogram with a new VIN. There is a reflash feature for VMAC 2 but unsure if you can wipe it out like the VMAC 3 's. If you were 400HP or less you could do the VMAC1 to VMAC2 conversion kit. VMAC1 to VMAC2 kit.pdf 2 Quote Link to comment https://www.bigmacktrucks.com/topic/50745-trying-to-replace-vmac-1-ecm/#findComment-377214 Share on other sites More sharing options...
mandersdiesel Posted August 11, 2017 Author Share Posted August 11, 2017 I appreciate You guys responding so quick. Your right, there isn't an option to re flash for vmac 1 which I found rather odd. But you would think there has got to be a way to wipe a used ecm and reprogramming it instead of having to buy a blank reman ecm. I mean the reman center must somehow be scrubbing them, right? Quote Link to comment https://www.bigmacktrucks.com/topic/50745-trying-to-replace-vmac-1-ecm/#findComment-377220 Share on other sites More sharing options...
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