Quote:
Originally Posted by syntaxterror
cadillackid Have you tried to hack the bus ecm yet? They don't have that many publix's in Ohio do they. Does anyone know the the towing capacity of a bus
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Not yet.. the most ive done is go in with the Approved servicemaxx software and alter the speed limiters and a couple other settings..
the J1708 standard is RS485 and the over-laying protocol fairly easy to understand, so I just need to capture some data frames of me changing parameters and then do some simple comparison algorith,s to pick up the packet structure and PID's
I have a copy of NavKal which is supposed to do more but that Bus is in Ohio and im in florida (I have 2 residences,, primary Ohio and an apt in florida{st pete}).. ill be in Ohio over thanksgiving and may try to play with that Bus ECM a bit to see what I can learn. being mid 90s technology in the bus ECM's, my guess is they didnt get too crazy with encrypted hashes or anything to alter parameters...
the aftermarket really never has done anything with them as there's been no demand.. Powerhungry Performance did some T-444E stuff but that was on the Pre-97 ECM's when Ford 7.3 and the T-444E ran the same computers.. once emissions stuff started changing for consumer diesels but wasnt required on commercial, ford and navistar went separate ways on the computers...
all the later Maxxforce stuff runs on the newer J1939 standard with a new protocol that from what I have been reading is a lot more strict on using Hashes and what not to update an ECM.. (similar to some of the newer cars)..
all the earlier HEUI engines like we see on the forums should be on J1708.
no there arent publix in ohio but theres one a block from my apartment in st pete..
-Christopher