By they way you can get reasonably priced timing guns that pick up straight off the wiring to the coil pack, maybe before you buy the gun ask the guy in the shop if you can test it first, to see if it picks up the signal!
negative, that wire that ive shown being grounded GOES 2 pin 44 so no need 2 ground at ecu.. try it . ive got it running on my zed atm. and it fixes the neutral switch. talking from first hand experience here.. JUST DO IT
yeh mate auto 2 manual conversion, runnign a auto ecu . and i have a auto alterator harness (no neutral switch lines). i only have a neutral switch plug hanging out of the tranny with nothing attached 2 it
Apologies, I thought the original poster was running an auto ecu in an car which was originally a manual, so the ecu would have to be grounded!
i already have a timing gun that does that. What I wanted to know was the real base timing, which you can only get using conzult.
From what I have found, it only affects when throttle closed idle. As soon as you crack the throttle, you'll notice a zed (with a neutral switch) will jump to 25-30deg on the CAS dial of datascan. Using a timing light, with the neutral switch disconnected, to timing 'appears' to be 25deg off throttle. Ground that neutral switch wire and the timing goes back to 15deg. (Assuming your CAS is adjusted correctly). In fact no neutral switch makes it easier to drive a manual in stop/start traffic, I can idle down to ~300-400RPM at an absolute crawl without stalling:biggrin: Obviously using a little more petrol... If no active neutral switch working, you can temporariy splice into and earth the yellow wire with blue stripe on the 8 pin brown connector harness which is right next to the engine bay relay box to accurately check base timing. This fools the ECU into thinking the neutral switch (which is just a switch connected to earth) is on - as in neutral. You'll notice engine RPM rise and fall as you connect/disconnect the temporary earth wire... (See enclosed pic)
Negatory, Martin the (lack of a) neutral switch only affects timing @ idle with throttles closed. As soon as you hit the throttle, the timing jumps to 25-30deg +. If the neutral switch is broken, the ECU keeps the timing approx 10deg advanced at idle, as soon as throttle is cracked, the ecu moves the timing to 25-30deg but as it is already @ 25-30, there is no change. For accurate base timing check with timing light, ground the neutral switch wire (see my other post here for how to do this inside the engine bay)
