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STILL dumping boost @ full throttle.... NOT CBV or hoses! 700 1991

posted by  someone claiming to be Jon Belmont on  Wed Oct 31 14:57 CST 2001 [RELATED]

Argh! I went in to the auto craft shop on post today, and along with replacing the headlight surround on the side on which I had the accident, I also yanked off the CBV from the turbo to check it out. The o-ring was hardened and cracked right off, but replacing it didn't seem to do any good. The diaphragm held a vaccum, and actuated at about 10 mm hg. I guess that's normal? The spring seemed tense and responsive. I also replaced the vaccum hose from the CBV to the throttle body just in case. Still, it dumps the boost at full throttle just like before. ANYBODY!!! Other ideas? I still haven't checked out the Throttle Position Sensor, but I can't figure out how that would cause boost to vent to the atmosphere.

Thanks,

-Jon '91 Coupe 162K "Gustaf"





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