Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - The Impsight: My mischievous little devil of a car. ('00 Insight fixing and modifying)

Ecky · 12-08-2020, 08:08 AM

I think we can rule out pre-ignition. Lean ratios past stoich generally don't cause this, because combustion temperature starts to drop again above ~15.3:1 (E0).

Maybe try running non-ethanol gas for one tank? Stoich AFR is slightly different.

12-08-2020, 08:08 AM	#49 (permalink)
Ecky Master EcoModder Join Date: Dec 2011 Location: New Zealand Posts: 5,104 ND Miata - '15 Mazda MX-5 Special Package 90 day: 39.72 mpg (US) Oxygen Blue - '00 Honda Insight 90 day: 58.53 mpg (US) Thanks: 2,908 Thanked 2,578 Times in 1,600 Posts	I think we can rule out pre-ignition. Lean ratios past stoich generally don't cause this, because combustion temperature starts to drop again above ~15.3:1 (E0). Maybe try running non-ethanol gas for one tank? Stoich AFR is slightly different. __________________ Ecky's (new) JDM Insight Ecomodding 2015 MX-5 Miata Honda Insight w/Acura TSX engine 2000 Insight TLC & Build Thread