today i was testing out BMBurner
ive made couple of changes to the tune
but once i set 14V instead of 12V when writing a chip
program was showing me error that burner was unable to clear the chip
after 3 tries i realised that it was set to 14V and i changed it back to 12V and loaded map correctlly
i verified chip it showed no errors
but when i put chip inside ecu i was having solid cel, fuel pump wouldnt prime or would instantly turn off, engine wouldnt start and missfired couple of times when cranking
i removed J1 to turn off the chip i never did that before so idk how car should behave i belive it should just use factory chip
car started imedietly but still had check eng light should it have check eng?
i tried 3 different tunes all gave me solid cel and car wouldnt start
did i damaged the chip? whats going on?

 

It is a 12v chip. It is likely that when you tried to program it at 14v, you damaged it. Try another one... they are cheap.

 

yeah I know theseare cheap but here in poland only way to get them is to order from china or ask other tuners if they would sell spare ones
I borrowed bmburner for one week from friend so I can finally tune this engine and now im stuck with damaged chip...
I Wonder how it verifying this chip everysingle time...

Also what about that check engine light after removing j1? Should it be like that?

 

It is possible that the ECU has suffered additional damage beyond the auxiliary chip. More testing is required. Consider trying a known good ECU in your vehicle to see if the CEL remains... or place your damaged ECU into another car and see if you get the same results as you do in your own car.