2JZ conversion not starting any longer

[MrOizo]

Cant seem to sort out whats going on.

looks like somethign to be pretty simple.

I have done a 2JZGTE conversion into a A70. Have had it running all before.

now for some reason, when turning the key all the lights on the dash ligh up apart from the ECU. Seems like the circuit opening relay isnt powering up / getting power. Fuel Pump gets its signal for its relay from the COR also and thats not powering up also.

Will crank and all that good stuff. Just no power to ECU to run..

Is there something that i could have bumped and stuffed? Maybe there is something some one else has done / hadnt done that i have overlooked?

Cheers.

 

[suprahero]

Have you checked fuses?

 

[crazysupra2JZ]

check all your power wires to the ECU. (IG, +B, +B1, M-REL... etc)
i had the problem where it would just crank and never start, found out one of the power wires were dead.

 

[Dr Tweak]

Also doublecheck the engine two harness grounds that bolt to the intake manifold. The ECU needs power on IGSW and +B, as well as ground on E1, to turn the check engine light on.

-Doc

 

[MrOizo]

Well shame on me..

Went over the loom as i was installing RSM and found that one wire was cut! Must have been me some how as no one else has been in there

Cheers for help though.

 

[p5150]

Wiring issues are damn near impossible to diagnose over the internet.