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-   -   04 ZHP, RPM drops below idle when stopped (http://forums.pelicanparts.com/bmw-3-series-e46-1999-2005/1049710-04-zhp-rpm-drops-below-idle-when-stopped.html)

marcopolo650 01-11-2020 02:56 PM
04 ZHP, RPM drops below idle when stopped
 
Hello gents!
I started to notice a week ago that my RPM dropping below idle occasionally when stopped at a light. it usually does it ones per complete drive. no check engine light. I was wondering if either the DISA valve or CCV that is causing this issue. the following jobs have been done on this 98K vehicle:

full cooling system refresh (thermostat, expansion tank and hoses)
valve cover gasket
Spark plugs
ECU reflash @ BMW dealer

Thank you in advance!


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