Post by
Klot »
https://forums.nicoclub.com/klot-u221776.html
Mon Jul 08, 2013 9:18 am
check fuses just to be safe, but it sounds like a TCU (timing control unit) issue. My S13 is having the same issue right now. Best way to test yours out is find a buddy with an S14 that everything works in, and swap yours into that car. Don't swap a working one into your current car, that will probably short out the good one and you'll be stuck with two messed up TCUs.
Not sure on S14s, but I know on S13s the dimmer switch is a big problem and can short the TCU