Question about 2002 GMC Savana
Lot suck air came front oil cap..l check pcv valve see fine my is intake manifull?
The PCV valve may be fine but what about the hose . It cab ne blocked up . Is the PCV valve connected up right . It is a one way valve and opens under vacuum ( when the engine is overrunning the throttle ). The extra air from the filler cap is an indication of excessive blow by in the combustion chambers past faulty/ worn/ broken rings.
Posted on Mar 29, 2014
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Posted on Jan 02, 2017
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