I had no Spark at plug ! Went through every usual hoop of course starting at the absolute wrong end of the problem with only 2 souring options left: Bad wiring harness or Bad ECU. I could not stand looking at that black silent mysterious 1000 bucks sealed box any longer ! To just get any kind of reaction or hint from her something whispered FREEZE the ***** 2 Solid Days in a Zip Lock Bag and: BIKE HAS NEVER RAN SO GOOD !!! Hope this can save anyone else going through this very long nightmare. "Carmo Electric" in California offer a possible ECU repair with 3 year warranty for about one the cost of new from dealer. All the best...
cryogenics.............even works for electronic systems too.......... next time I will roll my bike into the meat locker at my friends meat company to cryo the metal and the electronics all in one shot.
Just trying to wrap my brain around this one. How would freezing your ECU cause it to start working again?
Probably has bad solder joints and heat/humidity cause them to expand and lose connection. 90's Honda cars were notorious for bad solder joints in the main relays and wouldn't start when hot/humid out.
Basically the Freezing action squeezed the unit together, so as the great example above any separated connection would have a possible chance of reconnecting. Its only a temporary fix or a possibility to pin point the ECU as your problem if you don't have one to swap it with, I will still need it repaired or replaced.
You know this has really got me thinking here. I thought the ECU's on our bikes where sealed with a solid varnish like stuff but looking closer its more like a soft poly which I'm pretty sure I can pick and pull out, then I can re solder this thing myself ! ehmm I wonder if anyone has tried to open one ?
Am I going to get an ear full if I open a new thread asking if anyone has any experience on opening the ECU's ? I think I'm going try and repair this thing myself...
i used get burned during micro min soldering when I was a newbie, I thought I was a badass....joint looked great, color nice, flowed nice, BUT inspector revealed voids and possible cold joint or over temp joinst. definitely took some time to get the feel for hand working under the microscope. Im sure those joints are machine done. ours were hand done because they were us performing modifications/updates to existing cards--if I told you what they were for I would have to kill you......the platform has since been retired anyway.
I've resoldered piles of those honda main relays. I've never been in a dirt bike computer, I have to assume it is potted in something to avoid vibration damage. http://ecuhacking.activeboard.com/t9617940/how-to-get-through-the-resin-potting-to-circuit-board/ I'd give it a try if it was me. I like messing with that stuff though
Thanks a lot Man yeah its like a rubber I found a guy on youtube who soaked a CDI unit in Acetone to remove it which it did but also that messed up the wire shielding too so Ill keep looking but its going to be around 400 bucks for Carmo to do it so its worth the gamble.
Just be careful, lots of surface mount stuff in there. Maybe you can keep that one to tinker with while you ride with a new one.
