Date:         Fri, 9 Aug 2013 01:09:55 -0600
Reply-To:     OlRivrRat <OlRivrRat@COMCAST.NET>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         OlRivrRat <OlRivrRat@COMCAST.NET>
Subject:      Re: Failed Emissions - High HC at Idle
Comments: To: Dennis Haynes <d23haynes57@HOTMAIL.COM>
In-Reply-To:  <BAY179-DS11D9E060025572262C2432A05F0@phx.gbl>
Content-Type: text/plain; charset=WINDOWS-1252; format=flowed; delsp=yes

        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 isn’t 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.
>
> I’m 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