Reluctor wheel/Ecu

[HRT383]

I have just had a LS1 383 stroker built and only 4 or 5 cylinders are firing.Im told the reluctor wheel is wrong.The shop then reinstalled original 346 motor mafless tune(changed from stock tune) and this motor also missed but ran great when i Droped the car off.Could the incorrect reluctor wheel on the stroker have fried the ecu.2000Holden VXSS LS1 6 speed (Australia)Please help please

[edcmat-l1]

The wrong reluctor wont fry the computer. It may not run right, or run at all, but it wont fry the computer.
Did it run right at all after the stroker was built? If so, the reluctor is right.

[HRT383]

I saw the engine with the intake manifold off and 4 ports looked dirty other four were clean.I assume 4 fired and 4 did not?