i had my 02 gti 1.8t for a few months now. its apr chipped and besides the DV its bone stock. jumped on the highway and when i entered it i accelerated fine.. then like 15 min later i went to accelerate again car wouldnt push. once gears hit around 3000rpms it would tug and tug and if i would step on it, it would tug harder and engine light starts to flash. asked around and someone said it was in limp mode ? suggestions ?