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marcopolo650's Avatar
Join Date: Jan 2020
Posts: 1
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!

Old 01-11-2020, 02:56 PM
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