smiddy 76 Report post Posted August 4, 2012 (edited) Hi Guys, have a part throttle[just above idle] underload pulseing air vibrating Woommp-Woommp type of noise. Have had a bit of a feel around intake but looks ok. Car runs and idles fine. Wondering if anyone has struck this before, crankcase valve, idle valve???? Thanks. Edited August 4, 2012 by wayney Quote Share this post Link to post Share on other sites
antil33t 90 Report post Posted August 4, 2012 Maybe a Video might help? My E34 makes a pretty weird sucking noise when it's on the ICV. Quote Share this post Link to post Share on other sites
CSET 592 Report post Posted August 7, 2012 Are you sure it's intake? Are you getting any vibration through the car? Quote Share this post Link to post Share on other sites
smiddy 76 Report post Posted August 7, 2012 No vibrations. Looking further and reseaching would indicate the PCV valve / oil seperator. They are a common fail and produce a goose like groan at part throttle load or blipping throttle. Removal of filler cap while engine is running produces sound. Also a weeping oil leak is evident under manifold, another tell tale sign. Quote Share this post Link to post Share on other sites
