RE: Recall on 07 Harley-Davidsons
And FWIW, Yes, I was a bit presumptious on my statement about the PC preventing comm..... So I did a little experiment over the past 3 days....
I hooked up 19 different bikes, all equipped with PC's (III, IIIr, III USB).......
Out of those 19, 1 had no comm with PART of the data that is transmitted from the ECM to the D/T...., 3 completely failed comm
After finding those 4, I swapped them to other bikes, to see if it was the bike or the PC.....
Found that out of those 4, 3 had outdated FIRMWARE (Internal Logic programming), and 1 had an internal short (The back plate was severed off 3 of them, and the zip ties were holding everything together)......
The reason for the outdated firmware was these units sat on a shelf for over 3 years, and technology passed them by... They would hold a tune, but the LOGIC that it uses to manipulate the data was outdated....
As far as the case cracking and back plate detatching, that is an installation problem.....
12 of 19 were installed by the customers, the 4 that were bad were in that batch of 12......
If you do have a PC mounted on your bike, I would suggest INSULATING the PC from the vibration of the bike by using some Camper tape or doublesided foam stripping to absorb the high frequencies that occur to the chassis.... I think that this is what is causing the internal shortings, as the guts are solid state, but with time and constant vibration, ANYTHING can and will break/fracture.....
The PC is a decent unit, and I am not Biased against it, if anything, Dyno Tuners who are looking at making a quick $$$ would prefer to use it, as you can tune on the fly. and you have less areas to work with... Cheap and quick.. NEXT.....
I have seen far too many of them fail (Prior to this "Experiment"), to see some flaws that are in them..... My first PC was a III.... Would engage and manipulate fuel/spark mods ONLY when the ambient Air was at least 50 degrees..... Lasted 4 months.. Went to a IIIr.... Better unit as far as wiring and construction, same tuneability functions, but at least is was engaged at all times..... With the USB variant, you now have a few new features (Rev Extend/Accel Pump).......
|