Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums - Camaro5.com - View Single Post - California Testing for ECU Tunes During Smog Checks

KaBoom1701 · 10-23-2021, 12:19 PM

I just went through this myself..... first test failed due to tune.

You'll need to reflash ECU back to stock tune and depending on your mods reinstall OEM parts. Stock Air Box, Injectors, Exhaust manifolds and cats are the min.

Also after the reflash you'll need to complete the GM drive cycle in order to reset all the DTC codes and sensors. 100 mile drive might do it but you can complete it in 15-25mins if you follow the procedure.

Glad I saved all my stock parts.

10-23-2021, 12:19 PM	#8
KaBoom1701 KaBoom1701 Drives: 13' ZL1 Red M6 Join Date: Dec 2012 Location: I.E. SoCal (Yucaipa) Posts: 8,631	I just went through this myself..... first test failed due to tune. You'll need to reflash ECU back to stock tune and depending on your mods reinstall OEM parts. Stock Air Box, Injectors, Exhaust manifolds and cats are the min. Also after the reflash you'll need to complete the GM drive cycle in order to reset all the DTC codes and sensors. 100 mile drive might do it but you can complete it in 15-25mins if you follow the procedure. Glad I saved all my stock parts. __________________ Mods: Roto-Fab Intake, WW Res. kit & Big Gulp Air Scoop, Elite Catch Can, ATI Super Damper & 18% OD Pulley, LF Idler pulley bracket, Metco CC breather, ID850 Injectors, Stainless Power Headers w/ ceramic coating, TR71X Spark Plugs, JMS Fuel Pump Booster, Bo White TB, Tuned by Ted @ Jannetty Racing, Ron Davis HX, D3 Reservoir, Pfadt 1" Springs, Moreno Camber Plates, ZL1 Addons Splitter guard washers, Tow Hook kit & rock guards, Hurst Shifter Billet Plus 6 Speed Short Shifter, ZL1 DRL lighting harness, ZL1 Recaro Seats.