Yup. I am with Gadget. When is the last time you checked, or cleaned your air filter? I had a really clogged one once, when mine was rear mounted. Was a pig off of the line and through acceleration. Wouldn't even hit boost, and I had a 8 psi spring in there. Pulled the air filter snorkel off of the turbo and bam! Truck ran like a champ! The filter was horribly clogged.