HARLEY: Computer died while programming
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Grand HDF Member
Joined: Jun 2013
Posts: 4,998
Likes: 875
From: Iowa
I pray they are not writing directly to the active lookup tables, but they probably are. The cycling of power probably just pulls the new values from the active memory in to the RAM.
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Grand HDF Member
Joined: Jun 2013
Posts: 4,998
Likes: 875
From: Iowa
Because they don't sell Race Tuners for them anymore. For $700 I can get a Thundermax ECU with wide band O2 sensors and autotuning. If I replaced with another Delphi ECM plus what the dealer will want for labor, programming, and a full tune with my modified engine I'll be out around $900-$1000, won't have wideband O2 sensors, won't have a tuner to adjust the MAP if I make any future changes, and no autotune. I could just get the ECM and go the PowerVision route, but to get the wideband and self tuning that would be the $450 from the dealership for the Delphi counting the labor for installing it, and another $750 for the PowerVision with Autotune for a total of $1200.
Last edited by Jay Guild; May 15, 2017 at 11:53 AM.
Seasoned HDF Member
Joined: Dec 2005
Posts: 19,926
Likes: 8,028
From: poway
There are a dozen ways to armchair this issue.. IIRC Cole told me that the pre CAN ECUs are resource limited in both volatile and non volatile memory. The early Dephi systems are pretty crude from what I've seen. Heck now days cars are getting wireless modems and can get OS updates OTA...
Road Warrior
Joined: Oct 2014
Posts: 1,764
Likes: 266
From: Roma Alberta
it's happened to my '02 a few times while changing values with the SE race tuner. first time the bike battery ran low, second time the laptop battery went low. both times it had to go to dealer to reprogram ECU, it would say no VIN number associated with the ECU.
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Grand HDF Member
Joined: Jun 2013
Posts: 4,998
Likes: 875
From: Iowa
The CAN systems are pretty nice. The newer tuners with Bluetooth interfaces that can monitor while you ride through a smart phone, modify MAPs, and give suggested tuning changes are pretty sweet. Silicon has gotten so cheap. $5 for a 512 MB ARM chip can do a lot.
Seasoned HDF Member
Joined: Dec 2005
Posts: 19,926
Likes: 8,028
From: poway
If you can get a thundermax for 700.. Go for it. Much easier to tune.. Need 18mm bungs on the headpipes tho..
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Grand HDF Member
Joined: Jun 2013
Posts: 4,998
Likes: 875
From: Iowa
So the dealership called at 3 yesterday to tell me they couldn't get the ECM reprogrammed. I asked if they tried the two procedures in the 2007 ECM recovery notice of taking a test ECM through the communications verification steps and then switching to the bad ECM at the programming step and trying to wipe the memory to factory and using the new install procedure. They assured me they had. So I asked if they installed a new Delphi if they would guarantee that the SERT would still work. She assured me it would but said she would call the Harley tech line to verify before ordering the new ECM. Two hours later she called me again and said that when they called the tech line to verify the SERT would still work they gave them the procedure to wipe the memory and reprogram to factory stock and that worked. No new ECM for me! $67 New lesson is go in with questions and never assume they know what they are doing.
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