Hey, any stock FD ECU experts out there? Perhaps, someone with a schematic? My Pettit ECU has developed a problem...well, two problems actually, but I don't really believe in coincidences. First, I get an immediate error code for knock sensor, and I know for a fact its the ECU (a stock replacement ECU works fine). At roughly the same time, I noticed that the output from the ECU that tells the AC to run does not work (again, verified ECU problem). I don't know why these two circuits would be related, but they could conceivably use logic gates that reside on a common chip or something. Maybe their respective I/O are near each other on the connector? Anyway, if anyone has info about this, I'd appreciate hearing it.

jds

PS: Btw, I've swapped both microcontrollers and daughterboards, to no avail...so it definitely appears to be an issue with something in the ECU box itself, which is somewhat surprising to me.