Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - California to start checking OBDII cars for tunes

serialk11r · 07-16-2021, 10:18 PM

Okay that sounds plausible to me but can you fail smog with a stock checksum just because the ECU's been tampered with before? That just sounds silly, it means any ECU that's been tampered with but restored to factory tune will fail.

07-16-2021, 10:18 PM	#13 (permalink)
serialk11r Master EcoModder Join Date: Jan 2012 Location: United States Posts: 1,756 spyder2 - '00 Toyota MR2 Spyder Thanks: 104 Thanked 407 Times in 312 Posts	Okay that sounds plausible to me but can you fail smog with a stock checksum just because the ECU's been tampered with before? That just sounds silly, it means any ECU that's been tampered with but restored to factory tune will fail.