2017 Camaro SS1LE HCI why does it idle better on e85 than 93 Premium?

Sheldor · 11-20-2023, 04:27 PM

My car idles great on e85, but as soon as I add 93, the idle goes a bit higher and the cam chop is a lot faster than its supposed to be. Would this be something in the tune that would need adjusting? It runs fine on BOTH. Thanks in advance

GPI stage 3 cam with supportive mods, msd atomic intake, TSP 1 7/8 headers, flex.

CamaroDreams76 · 11-21-2023, 06:48 AM

I noticed this with my 5th gen. I have a flex fuel sensor on it. Ran and drove way better on E. I think the car likes the higher octane and the tuner took more time to perfect the E tuning.

11-20-2023, 04:27 PM	#1
Sheldor Drives: 2017 Camaro SS 1LE Join Date: Sep 2023 Location: Beeswax Posts: 19	2017 Camaro SS1LE HCI why does it idle better on e85 than 93 Premium? My car idles great on e85, but as soon as I add 93, the idle goes a bit higher and the cam chop is a lot faster than its supposed to be. Would this be something in the tune that would need adjusting? It runs fine on BOTH. Thanks in advance GPI stage 3 cam with supportive mods, msd atomic intake, TSP 1 7/8 headers, flex. Last edited by Sheldor; 11-20-2023 at 06:50 PM.

11-21-2023, 06:48 AM	#2
CamaroDreams76 Tri-County Camaro SWFL Drives: 2013 IOM 2SS/RS/1LE Join Date: Apr 2013 Location: South West FL Posts: 3,395 View My Garage	I noticed this with my 5th gen. I have a flex fuel sensor on it. Ran and drove way better on E. I think the car likes the higher octane and the tuner took more time to perfect the E tuning. __________________ Just bolt ons........ https://www.camaro5.com/forums/showthread.php?t=343023

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