[minicupracer]

SoI have a Cobb access port and I had at the 93 stage one tun on it and then went to get gas from a top tier gas station and even before I left the gas pump I switched it to 87 octane tune from the Cobb and right away it went from -1.00 to -.50.

 

[eza92]

Get a compression test, your engine is toast.

 

[ClarkRU]

Your OAR runs from -1.00 to +1.00. You want to be at -1.00, which means your fuel is good and you aren't getting much knock. +1.00 would mean you had crap fuel and lots of knock. So it sounds like you had 93 octane in it when you switched to an 87 tune...which would cause the OAR to adjust in the proper direction...so assuming I understood you correctly, there's no issue and nothing to see here.

 

[minicupracer]

Yeah I still had about a 1/8 of a tank of 93 when I switched it. I'll run it for a bit. Get the 93 out of it.

 

[minicupracer]

Yep. After some driving slowly crept it's way back up to -1.00

 

[MagneticManiac]

After you flash a new tune the OAR goes to a preset value. Cobb OTS start at -.50. Most tuners start at 0 and make you work to get -1.


Tap Tap Tap...

 

[kshatt06]

Get a compression test, your engine is toast.

Haha this guy...

 

[minicupracer]

I don't want to see that photo. Lol mine is red also. Hopfully never

 

[komsSTeed]

After you flash a new tune the OAR goes to a preset value. Cobb OTS start at -.50. Most tuners start at 0 and make you work to get -1.


Tap Tap Tap...

Thanks for this. I was about to open a new thread asking about this very thing.