I built this ka24de about a year ago. Put it in, ran fine and it sat while I did the body, suspension etc. and I don’t remember messing with anything on the engine in this time. now it’s stuck in limp mode and won’t go over 3500 rpms. It starts no problem as long as the mafs unplugged but wants to sputter out without throttle, especially with the maf plugged in. Also revs itself up to about 3500 rpms and drops back down repeatedly without giving it any throttle. The eccs relay also buzzes loudly when the key is in the off position, and it’s pitch changes with the maf plugged in (not sure if this is at all related to the issue). I read codes and got one for a coolant temperature sensor and a knock sensor. I’ve already tried a new ecu, distributer, eccs relay, tested continuity for all wires to the ecu, and pulled the intake to be sure there were no vacuum leaks and clean out a valve that was stuck open. Any information would be helpful as I’ve been stuck on this issue for weeks. Thanks in advance