[shinobis13hb]

does this apply to ka24de as well?

Originally Posted by mibh

because the haynes manual says "see dealer" and the FSM does not mention it, most of us set our base timing on a hot engine (which is good) but with the TPS plugged in (which is not good). according to the FSM, which i pored over in some detail looking for similar problems on my car, the idle switch on the TPS, or a low temperature (high resistance) from the CHTS, will cause timing to advance about 10 degrees. so, when you set your timing to 24btc, you're really setting your idle timing to 24btc, and as soon as you come off idle your timing is going to jump back to 14btc and then start advancing from there. this will put you far off your advance curve at lower rpm's. try setting your base timing with the TPS unplugged. also, buy some deoxit gold and use it on your ECU harness as well as your TPS, AFM, CHTS, knock sensor, distributor, and ignition harnesses. corrosion there will look like high resistance and will muck everything up.