I was prepping the car for the track doing hard runs to make sure everything was fine. After one of many runs, the car started to stumble and can barely hold an idle. I thought I popped another intercooler piping, but it wasn't. I thought I blew the engine because it sound like it was running on one rotor, glad it didn't. I noticed the check engine light was on do I checked the Palm and it said mop problem. I thought I disabled it since I ran premix. Went and found out that everything was set back to default. Set the injector again to 720/720 and it idled and started fine. I had to reload my saved maps.
I don't know why it reset itself but I wonder if it was the Palm pilot? It's a m125. I had it for as long as the rtek 2.1 came out for the s5 tii, this is the first time I have experienced this.

 

so after looking over the car, I found the alternator post to have broken off.....This might be the reason to why the ecu reverted itself back to stock. It must've grounded out somewhere. Since it wasnt broken yesterday, its the only real explanation.....now I need another alternator.

 

Did the Palm ever say "Checksum failed"?

 

havent seen that error

 

I can't imagine anything that would cause this without getting that error, with the exception of hitting the initialize button on the Palm.

I could see really noisy power caused by an intermittent alternator connection possibly corrupting the NVRAM. But that would have thrown a "checksum failed" popup next time it connected which would have forced an initialization.

 

Did you have the palm connected the whole time during the incident? I can see the palm being an issue because the ecu doesnt tell the palm rtek software "you are 550cc" or "activate mop" maybe with the intermittent power, a corruption occured and reverted back to backup files or default.

 

Havent driven the car that much since the alternator went but I am pretty sure this is an aftermath of that. The primary injectors for the front housing is not working at all. The engine is really sluggish and it sounds like a subaru boxer engine. You can tell its running on one rotor.

It only does this when it is warmed up completely. When it is cold it is running like a champ, but once it warms up the rpm drops to 300-500 and that boxer engine sound happens.

Did something get fried in the ecu or corrupted the rom somehow from the alternator post grounding out to make it happen like this? This is the first time this happened and it was right when the alternator incident happened.

 

This same incident also happened to me at the beginning of the year. Same situation: hard run, then all of the sudden the car barely runs. We were monitoring data via the palm at time of the incident.