1996 Ford 7.3 Turbo using about a gallon of oil per 200 miles. I have already replaced one injector and all the o rings on the other injectors, I bypassed the doghouse on the valve cover with a heater hose and pluged the intake side of the inlet. No leaks around or under the pestal of the turbo.I've had a computer on the engine and everything (psi) looked great. No smoke coming from exhaust that I can see ( Its a dually). About ready to go crazy with it. HELP!!!