I am on my 3rd fried ECU !!! Very long story and extensive troubleshooting done by myself and a very experienced/trusted mechanic. It is a hayabusa engine transplanted into an off road vehicle and I was told it was an '06 model. I am a year into this problem and yet to get it running properly for any period of long time and so ready to be done with this!!!
What happens is runs great (dyno verified putting down proper HP, curve loks great, etc) and shortly afterwords (days/weeks) the third cylinder (third from sprocket side ... evey time it has been his cylinder) has a slow death. It initially appears just not to wake up until on the gas but can see some weirdness when back on the dyno so its probably cutting in and out. It is verified it is essentially out at idle as that header is only 300 degrees where as the other three are like 600. Leave it running like this for a while and it eventually goes completly out and then the second cylinder starts to do the same. Lots of stuff checked to make sure electrical is good but always comes down to just replace the ECU and sure enough each time life is good again ... for a short period. So, what if I actually have say a '99-'00 or and '01 engine running on a '02-'07 ECU? Could this be my probelm or would it not start at all or run like total crap the second it fires? I will try and call Suzuki to determine year model for sure based on engine number ...
I am also a bit suspicious of my Power Comamnder III and also have GiPro w/ATRE. Maybe one of these two with a mis match in years/model for that year would also fry the ECU? Unplugging these does not fix the problem once it has occurred. I did just move the grounds for these and a couple other low voltage things as installer put them on the engine ground and I cant image all that heat transfer (only like 1ft ground run to PC box) is a good thing ... I have had ground issues before on another vehicle where it really needed to be on battery as these PCs seem to be very sensitive. Maybe heat (I did also have bad head gasket and overheating previously) damaged my PC thus frys my ECU eventually? I will likely just get another ECU and PC (probably get PC V for the heck of it ... hoping less ground sensitive).
Thanks for any help ...
What happens is runs great (dyno verified putting down proper HP, curve loks great, etc) and shortly afterwords (days/weeks) the third cylinder (third from sprocket side ... evey time it has been his cylinder) has a slow death. It initially appears just not to wake up until on the gas but can see some weirdness when back on the dyno so its probably cutting in and out. It is verified it is essentially out at idle as that header is only 300 degrees where as the other three are like 600. Leave it running like this for a while and it eventually goes completly out and then the second cylinder starts to do the same. Lots of stuff checked to make sure electrical is good but always comes down to just replace the ECU and sure enough each time life is good again ... for a short period. So, what if I actually have say a '99-'00 or and '01 engine running on a '02-'07 ECU? Could this be my probelm or would it not start at all or run like total crap the second it fires? I will try and call Suzuki to determine year model for sure based on engine number ...
I am also a bit suspicious of my Power Comamnder III and also have GiPro w/ATRE. Maybe one of these two with a mis match in years/model for that year would also fry the ECU? Unplugging these does not fix the problem once it has occurred. I did just move the grounds for these and a couple other low voltage things as installer put them on the engine ground and I cant image all that heat transfer (only like 1ft ground run to PC box) is a good thing ... I have had ground issues before on another vehicle where it really needed to be on battery as these PCs seem to be very sensitive. Maybe heat (I did also have bad head gasket and overheating previously) damaged my PC thus frys my ECU eventually? I will likely just get another ECU and PC (probably get PC V for the heck of it ... hoping less ground sensitive).
Thanks for any help ...