- Injector Drivers fail (blown engine as result).
- Wiring harness connector terminals not seated fully from factory (annoying intermittant fault to find).
- Shitty cheap connectors.
- Internal relay fails.
- Send back to factory to change engine/trigger/sensor configuration.
- Impossibly to tune correctly. (Have to just run it fat due to lack of precision/fine injector control. This bugs me no end, possibly even more than the rest).
I'll add more as I remember, I try and stay away from these things but people keep buying them.
I especially love the "But xyz does a 7 second quarter with one!"
[sarcasm]Yes, that totally means your street car will cruise and respond nicely.[/sarcasm]
He is running methanol and CDI, it takes a fair bit to actually not make power, and he doesn't give a rats about driveablilty.
I try and point out that Microtech ECU's are proven.... to be rubbish
. And yet they still get one.
What is hilarious is that anyone who actually knows about ECUs knows this to be true, but they just get a sale instead of trying to educate the public.