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Vacuum leak check 900 1991

posted by  jotvolvo on  Mon Feb 18 03:27 CST 2008
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last visit: Mon Oct 12 08:43 CST 2009
[RELATED]

Hi all,
On 1991 940SE, I am planning to check the vacuum leakage using air pressure. As I read here I will apply air pressure from the hose by removing it from the AMM. Have to block the hose that goes to PCV valve. My question is that the air will be leaking through the IAC that is always some what open. Also may be through the throttle body plate. What about the turbo. Would someone guide me what is the proper procedure to detect the vacuum leakage using air pressure.
Thanks
Ram






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