Thank you AL ever so much for this advice....your above reply sounds dead on in regards to whats happening. Damn I wish you were a little closer. If you had a shop in WA you would have gotten this job of mine easilly. But ya get that.jzk25 wrote:Lol. Credit where it's due.
I have been on straddie for a few days hence talking to Miles and no me.
The problem will be with the immobiliser wiring. No injector pulse is how the imm does it's thing. A squirt of carb cleaner down the intake is an easy way to confirm this.
The immobiliser unit has battery power(large blk/red), ignition power(green/red), a pair of earths(green/white), two signal wires to the ecu(red/yellow,yellow/red?), an indicator light for the dash(brown?), a drivers door switch input(can't remember) and a key switch input(white?). The other plug is the aerial on the key barrell.
If the powers, earths and communication wires are connected I reckon the key switch is probably where you went wrong. The key switch needs 12v constant to the connector on the barrell. When you put the key in the ignition the switch allows that 12v through to the immobiliser unit to signal the key is in the ignition. The IMM will not operate without it so the engine won't start.
This assumes that the ecu, imm ecu and key are all from the same vehicle also. If they aren't it also won't work.
FWIW, I would not use an SG ecu on a 2.5 sohc given the choice. I opt for the 99-02 Liberty ecu and manifold instead(even when using an SG engine). The SG ecu is inferior to the Liberty ecu and is also crippled with tougher emission controls so the engine performance and response suffers despite the advertised power ratings being similiar.
This is just how I would and have done it if I was in control of the conversion from the get go. You're nearly at the end so don't worry about it, it's more for other peoples info.
I'm back tomorrow if you need help.

I also deeply appreciate the tip on the ideal ECU & Manifold setup for this engine.....very interesting indeed! How much difference in performance are we talking AL, out of curiosity? If it dramatically improves performance, it might be a project for the future perhaps......
Regards,
Karen
