I am a beginner tuner, with very little knowledge on the subject. I?m attempting to follow the instructions given at ls1tuningguide.com, but I?m running into some errors.
Car ? 99 Mazda Miata with ?99 Firebird LS1/T56, custom cam, ?06 Z06 MAF sensor (5-wire blade-style), stock injectors
Computer was a duplicate from my road-race 99 Firebird, which was heavily modified and tuned. I copied the fuel and timing tables from a stock ?02 Camaro trying to get back to a stock-ish tune. I averaged the values from the ?06 MAF to get values that would match the frequencies that the Firebird computer is looking for. The car runs on this setup (attachment called Miata_tune1), but is rich and underpowered.
I then setup another tune (MIATA_TUNE-fuel_calibration) where I put it into open loop with a failed MAF. I ran the Scanner per the instructions to pull the %AFR error, and copy/paste special by % back into the fuel tables. The more I did this (even trying %1/2) the worse the car ran, and started to go from far rich to far lean and back on acceleration. The car also won?t idle on this tune, despite the raised idle and idle airflow.
There must be something simple I?m missing here. Please look over my files, and see if you see something I?m doing wrong. I have HPtuners Pro, with ASPX wideband gauge connected. The readings in the scanner match those on the gauge.
Many thanks in advance, Jim.