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Recirc vacuum leak? Whistling 900

posted by  Amarin on  Tue Dec 10 19:37 CST 2013
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last visit: Thu Oct 23 22:42 CST 2014
[RELATED]

Hello,

Have a look at the plastic vacuum hose coming out of firewall just below the distributor. Be VERY gentle in handling this as the hose might also crack during checking. The hose became hardens after being exposed to exhaust heat all this while. A leak could be there.

In my case the plastic hose was cracked. I repaired using the usual flexible vacuum tubing all the way to the 'Oreo' valve. The symptom was the vent blows to the floor during accelerating. But there was no whistling sound inside cabin.

In your case I think the rubber diaphragm in one of the vacuum servos might have a leak producing the sound you've described.

Hope this helps.

Amarin.






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