I got these error codes: EEC-V error codes, P1100, P0172 & P0175, P1100 Mass Air Flow Sensor Intermittent, P0172 System Too Rich - Bank No. 1 & P0175 System Too Rich - Bank No. 2.
My solution was A MAF optimizer. The problem for me was a too rich mixture for idle. I'm still playing with the manual settings on the MAF optimizer.
My Cougar was stalling/quitting when the engine went from high revs to an idle, like at a stop, with the new MAF, TB, SVT upper and lower Manifols and the 19 LBs injectors. The mixture was too rich for idle.
When you increase the mixture too rich for driving, you have to decrease the mixture (rich) for idle.
The 75mm MAF just was not calibrated correctly for my setup.