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so lets call this correctly. YOurs is A kJET . so we are talking about the auxiliary air valve or AAV If it does not open the the cold idle will not rise and therefore the idle will be slow and rough. The valve should be open at first start , closing as the engine warms. A simple test remove from car , place it in a freezer, when you remove it the t
valve should be open . other issues could be present, if this checks out
leaking cold start valve.
binding air flow sensor
gummed up injectors
control pressure too high
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Ron
2015 Porsche Cayman - Elizabeth
2011 Porsche Cayman - Bond,James Bond
Sadly MERCEDESLESS - ALways LOOKING !
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