According to a 2002 Impreza ServiceManual that I have ~ Idle speed at Park/Neutral position (A/C OFF) 650(MT) 700(AT) 650 is where mine idles most of the time with brief dips to 637 & bumps to 662 ~ on very rare occasions it will do a brief dip 625 ~ Idle is very smooth @ any of those RPMs. If you want it to run @ 700 you can alter the ECU to think it is in an A/T ~ My ECU was originally set for A/T & I switched it to M/T ~ It's a real GasSipper @ 650RPM, only . 17GPH on SummerGas. ORR ~ DeanB
On 7 Aug , 2013, at 9:13 PM, Dennis Haynes wrote: > Being this is a Subaru engine isnt the idle electronically > controlled? 650 rpm seems low and that could be part of the problem. > The CO of .15% may indicate a "lean miss fire" condition. The HC > reading 0f 87 at 2,500 rpm is also a problem. I'll bet a new > catalytic converter will take care of both problems. I would do a > compression and leak down test to make sure all is in order, then > look for vacuum leaks or bad injectors. The should be able to check > emissions pre and post the Cat to see if it is working. > > Dennis > > > -----Original Message----- > From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On > Behalf Of Gmail > Sent: Wednesday, August 7, 2013 12:17 PM > To: vanagon@GERRY.VANAGON.COM > Subject: Failed Emissions - High HC at Idle > > Just failed UT emissions with high HC at idle. Strange thing is this > is the exact set up I had before installing a different zero time > rebuild due to the first using too much oil. The only difference > with this new rebuild is the idle is now around 650 rpm where as the > original rebuild idled at 800-900 rpm. > > Im wondering if I adjusted the idle back up to the higher numbers > it might pass. > > Idle CO2 12.96 O2 3.14 HC 287 CO .15 > 2500 CO2 14.75 O2 .47 HC 87 CO .21 > > Thanks > > Scott |
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