Hi Sean, I had a problem with the immob on one of these before.Sometimes it would crank + run for a couple of secs, sometimes it just cranked over, and then others it wouldnt even crank! The was a fault stored in the engine ECU for a blocked ECU and the KTS wouldnt comm with the immob.There was an ignition supply missing at the immob, I just ran one in + problem solved.I think it was a black/red wire. Hth Sean