Hmm...another ZZP PCM Issue perhaps? Maybe now everyone will see what I've been babbling about I lost a motor to one man...I know how you feel. Flashing SES light is most of the time a misfire...pull the pulgs to see if any are bent...you might be knocking with that 3.4" and not enough flow mods. Try checking plugs, wires, coil packs, and the ICM (Ignition Control Module...the aluminum part the coil packs sit on)