hi mark

if its been in the garge for 2 years+ just make should the air sensor in the meter head isnt stuck down (remove the KnN filter or air box and see if the plate is up like it should be)

if its down it will think your full throttling

if it was ok when you put it in the gauge it will be something stuck we just need to find it mate. start here and work back

ps what mods do you have on it

stu