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Registered
Join Date: Nov 2006
Location: Copenhagen
Posts: 77
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Engine running way too rich - What can be wrong ??
Hi -
Just had my transplanted 1995 993 tested on a dyno. Max power showed 250hp/317Nm and and A/F showed way too rich from 5000rmp and up. Last year it did 270hp/342Nm. No changes since then. Engine is stock except for the exhaust which is something homemade based on a flowmaster muffler and no cat. KN airfilter which is nice and clean Any ideas what can suddenly cause this loss of power ? (Im thinking injectors, MAF sensor...) The guy testing this is also specializing in remapping ECU and suggested naturally that he could do a customized remapping using the dyno to correct the A/F and other things as well. Anybody having tried to have done a customized remapping ?? Peter
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'73 911S Targa black - original  '73 911RS clone 3.6, non-sunroof Coupé  '01 Volvo V70T5 - 320bhp 
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06-26-2010, 02:03 PM
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Registered
Join Date: Oct 2003
Location: London Ont Canada
Posts: 3,120
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The head temperature sender on the drivers side foreward end . The sender thinks it is cold and adjusts the mixture rich like a choke would. I had this happen and found mine hard to start when warm and you could smell the rich mixture when running. I think Porsche also enrichens the upper RPM mixtures to cool the cats
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1980 911 SC 3.6 coupe sold 1995 993 coupe 1966 Mustang Shelby clone 1964 Corvair Spyder Turbo gone 2012 Boss 302 Last edited by johnsjmc; 06-26-2010 at 05:57 PM.. |
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06-26-2010, 03:51 PM
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