I have done musical chairs with all the relays. This machine ran but poorly at full bore. I replaced throttle position sensor, spark plugs and cleaned mass air flow. Major response to those repairs. Customer called back a month later asking if I was going to fix the machine. I already billed them and they paid. Went back, just for Giggles removed the vaporizer. Disassembled cleaned and reassembled. Reinstalled it and started machine. Ran for about 15 seconds and quit. No report from injector or assist injector. Order replacements and installed. No change. No codes... pulled Cam and crank sensors. Supply voltage to them. I know crank is hall effect so that's hard to measure. There's a little bit for you to chew on. Let me know your thoughts, thanks for your replies