Gxpz06

after I wired the stock Ecu stand alone a common issue was that It would only write tune with the car running,. No biggie at those times with stock engine..

issue is that I wont be able to start with bigger injectors and idle for much Bigger cam.... any ideas what wiring issue may be or remedy !?

thanks in advance

Vetteforplay

If you have a spare computer plug you could make a bench harness or just double check these couple wires that are required.
https://sites.google.com/site/sloppywiki/tuning-information/obd2-bench-harness

Gxpz06

Very nice thank you ; that's what I thought about but I'm lazy I wondered if someone made bench set up?

; I would dignose this plus write tunes right on there (sounds nuts but in my set up it's actually facilitates logistics ))

I clicked and clicked and was able to force a write into it and tried cranking couple times but too late to make more noise ; if can't crank over and have to beat tune and tune into it a bench set up would be ideal )))

Gxpz06

Update::: appearantly the stock Ecu wont write if the voltage is Above 16v (explains why would write it running because it would drop Voltage )).. I could do a write up but I guess I may be the only Nut running 16v with otherwise stock stuff

worst of all I Ruined a brand new flywheel once it got hot from cranking the starter teeth is Not the weak link