Haltech E8 - Problems with 2JZ VVt trigger

[jzk25]

Trying to get a 2JZ VVt engine running with a Haltech E8. The spark is erratic and I think it isn't reading the VVt motronic 36-2 crank trigger very well. Whether this is due to a faulty or weak sensor I don't know. haltech ahs checked the ecu and it runs the engine on their simulator so we can assume it's ok. they checked the setup for triggering etc and it is also ok so that leaves the sensor/trigger wheel at fault. the car was running with the setup before but the car was completely pulled to pieces and the wiring harness cut in half by some fool. I had to piece the car back together from boxes of parts and replaced the harness with a new one from haltech and believe it is correctly wired.

The ecu has an RA10 reluctor adaptor/booster fitted as well. I don't have an oscilliscope unfortunately so can't directly check the signal but I get a good led pulse from the RA10 output to the ecu(converts the reluctor signal to a square wave).
There is no cam sensor used as the E8 has no use for it on a six with 36-2 crank trigger.

So I was thinking about adapting a honeywell type gear tooth sensor in place of the toyota CAS to give the ecu the clearest signal possible.
Anyone tried this?

Just had a thought whilst typing that I should check that the trigger wheel hasn't come loose on the crank belt pulley like the old JZ's used too.

Any other help would be appreciated. Aftermarket management owns me.

[dave368]

Have you checked the polarity of the wires to the CAS? As it is a recluator type, they are polarity sensitive.

It normally results in timing jumping around at different RPMs, so ou might be able to get it right at idle, but it varies as rpm changes.