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Turbo Hissing Noise 700 1988

posted by  zotparkerm on  Mon Sep 26 03:35 CST 2005
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last visit: Mon Jun 10 14:19 CST 2013
[RELATED]

What can cause a "hissing" noise when the turbo kicks in.

The noise appears to be coming from the vicinity of my left knee (but I swear it's not me), maybe in the dash to the left of the steering wheel.

Any ideas?








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leaky hose. 700 1988

posted by  someone claiming to be JohnB on  Mon Sep 26 05:04 CST 2005 [RELATED]

There may be a manifold pressure transducer that is used to send a signal to the ecu which in turn increases the duty cycle of the fuel injectors. In any case there IS a hose under the dash that goes to the turbo gauge...also other hoses that go to the brake pedal valve/switch for the cruise control disconnect. So check ALL the hoses under the dash for leaks.







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