A friend of mine has an 02 lb7 that keeps defueling even without a tune. Did a search on the fprv and not sure if this is the problem. Keeps throwing 0087 and 1093's. He just had a new cp3 put in too. His mods are: the edge, ppe lift pump, intake, exhaust, and waste gate. Wondering if the fuel pick up could be causing this? Has 180,000 on it. Fuel filters clean to btw