Been running an Innovate digital wideband a/f. Installed on the back side with a copper bung and I can't keep the darn thing from reading 'failure'. Fuel type very consistent using 70/30 mixture of 114 and 91. Keeps flashing error on the trouble light. And reading 14.9 which I know is wrong. Other gauge showing 13.1 consistently!?!? Any ideas? Too far for snow to run up against sensor! Always let the sensor preheat! Just don't know??? All help would be greatly appreciated