Remote start overcranks in 1995 240sx

hey andrey44 not sure if you have tried this yet but make sure you have all the ignition wires connected to the remote start unit i did an s15 silvia very close to the 240 wired it up and had exactly the same problem rechecked the ignition wires and found it had 2 starter wires when i connected both starter wires hey presto problem solved let me know how you goI Love This Industry!!

Sorry bobk, injector positive isn't pulsed. One side of each injector is held at constant +12V fed directly off the key solenoid (BLACK/ red wire). Grounds are pulsed from the ECU thru pins (102, 104, 107 and 109). However you're right about being able to measure with a DMM set on A/C (though technically it's not alternating current, it's a DC square wave). Audrey, hook tach signal up to yellow/red on ECU pin 3. Or you can use any of the injector ECU ground feeds... the wire colors are: WHITE/ black, yellow/black, GREEN/ black, blue/black. Also test that the ECU gets the cold-start signal as xtreme points out. You'll know if it's not connected if it overcranks when the engine's cold and works perfectly after the engine warms up (or it's hot outside). Verify that ECU pin #20 (orange wire) gets +12V during cranking (it's fed from the BLACK/ white wire at the key solenoid). Hope that helps.