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Vent servos and vacuum problem 700 1988

posted by  mapleleafer on  Sat Jun 10 06:12 CST 2006
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last visit: Wed Oct 9 00:36 CST 2013
[RELATED]

Vacuum leaks are not uncommon but usually cause the system to change from normal air (as selected) to just what you have, upon acceleration. It sounds like yo have lost the vacuum source into the passenger compartment. Check hoses, check valve nipples...

Anything further, you need to say whether it is a 760 (ECC) or a 740 (MCC). Turbo engines are more likely to kill the check valve or blow a loose fitting off.






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