I am having a hard time trying to figure out where to start with my problem. The basic setup is the same as last year but have added 1 5/8 long tubes and an 80 mm throttle along with a plx m300. Anyway, I set the basics along with maf transfer. The car idles around 14.5-15.0. It does this without any problems. I take the car for a drive and within 2 blocks after hitting 3500 or so it starts running choppy. At this point the A/F jumps to 19.0 - 20.0 then reads lean. At this point it will not run. I shut the car off then restart and it runs at 15.0 Where do I go from here? What do I check first?