That totally looks like one of my dyno's did when I had bad plug wires! Just try a cheep set of new wires from Autozone as a test and you will probably see a huge difference.
Former owner of '99 CSVT - Silver #222/2760
356/334 wHP/TQ at 10psi on pump gas!
See My Mods
'05 Volvo S40 Turbo 5 AWD with 6spd, Passion Red
'06 Mazda5 Touring, 5spd,MTX, Black
