About20ninj45

I went to flash my ecu using up tuners and it keeps failing during the write procedure. My battery is only 6 mos old and my fuse is good. Someone please help me. Symptoms I have when writing is the gauges go all the way down then back to normal levels like the truck is shutting itself off. Any ideas? I'd hate to have to walk 20 miles to get home

Wolftrk99

iTrader: (5)

Is the cable plugged in all the way... I hada similar situation with mine where it would just fail to write...

03sierraslt

iTrader: (22)

What year and ecm?

About20ninj45

Yes cables all plugged in. 06 Yukon Denali and stock ecu

03sierraslt

iTrader: (22)

Are you doing a Write or Write entire?

About20ninj45

While it tries to write the volt meter goes all the way to zero. Kinda like a key off during write.

03sierraslt

iTrader: (22)

Battery terminals tight and good contact?

About20ninj45

Yes and I'm just doing a write Calibration

About20ninj45

Vehicle won't start now either because it erases the previous Calibration. Tried writing the stock file I saved and still no dice. It only write to 10 percent and then fails for timeout. Tried to use slow speed as well I stead of high speed and same result

Flewbyu123

Do you have a remote start in your truck?