Fork lift has hard start condition. Not getting spark at plugs. Throws no codes on dash. When/if it does start it'll run rough and ultimately *** down.

What's been done: regulator replaced, maf sensor replaced, tps sensor replaced, all spark plugs and coil packs replaced, checked grounds and fuses and switched relays around. All check ok.

This unit does not have fuel injectors, has electronic carb set up. When I take apart intake tubing observe fuel is being delivered to carb. Seems not to be getting spark.

I'm leaning towards bad ecm but don't want to throw parts at it. I don't have access to a suitable code scanner. The one I have doesn't seem able to retrieve codes. Only clear them.

Input appreciated.

Oh. It's lpg