Join Date: Apr 2004
Feedback Score: 0 reviews
Whistling caused by a vacuum leak will not change during acceleration. Check the vacuum lines from the pump back to the dash, including behind the glove box, and back to the heater coolant bypass. Also double check the coolant level. If you have Auto climate control the system may be closing the bypass valve intermittently.
White 06 F350 Lariet CC 2WD DRW Tow Boss, Timbren SES, Bilsteins, Smiths Ultimate Bedliner, RK Tool Box, CondensorGuard, IntakeMod, S&B Intake, SEIC, Banks 4"TB, Accufab elbow, Edge Attitude CS, Blue Spring Mod, DCPower 185a alternator, Rebuilt FICM, STC and Standpipe update, Harpoon Mod, Coolant Filter, Glove Box Light, Hood Insulator, Rewired Mirror Heat, Seat Heater Indicator.