I am an owner of a 2003 bug-eye wrx. on the trubo tac whick usually goes to 8 lbs mine only goes to about 5 or 6 lbs now. and i know most of you are going to tell me i have a leak some where, so here is what i all did to try and find my problem. i changed ever vac line and every fuel line, the fuel filter, all four spark plugs and all coil packs, i changed every gasket even in the exhaust system, and i fixed a exhaust leak. if any one has any information on something that i may have missed please give me your input.