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code P-1123

Fuel System

Model: 996, Year:1999, Mileage:60600, Type of use:Street use only
Hi JoelJust now got the time to work on my car, on my last question you said the code P-1123 was a O2 sensor reading rich and to clean the fuel presser regulator as a possible. Is the fuel presser regulator mounted to the throttle body? also would it be a good idea to remove the throttle body and clean it at the same time? Did complete service a month a go and changed the fuel filter at that time do I need to change it again if muck in the regulator? Or can I assume the new filter is doing its job? My repair manual disk is corrupt on the fuel system section can open it.Thanks for your helpMark

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