RE: [DML] Volvo style CPR
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RE: [DML] Volvo style CPR



It is primarily a performance thing. That acceleration enrichment feature is 
disabled after the car warms up. It is there because cold engines need a 
richer mixture to run properly because fuel condenses on cold cylinder walls 
(and intake manifolds) resulting in an effectively leaner mixture. The 
"extra" enrichment just helps give the power it needs to accelerate properly 
when it is cold. I don't think it will adversely affect emissions if it is 
not there, but you will probably not have optimum acceleration when your car 
is cold.

-Joe Kuchan


>From: "Tom Tait" <TTait@xxxxxxxxxx>
>Reply-To: dmcnews@xxxxxxxxxxxxxxx
>To: <dmcnews@xxxxxxxxxxxxxxx>
>Subject: [DML] Volvo style CPR
>Date: Mon, 19 Dec 2005 16:34:30 -0800
>
>I have temporarily installed a Volvo style CPR onto my engine as I was
>checking the stock unit for problems.  Seems that both are fine, but I'm
>curious, the Volvo unit does not have the vacuum fittings to take the
>mix rich on acceleration.  Is this an emissions thing or performance?
>Can I consider this unit a viable emergency spare for the car, or will
>it damage it long term?
>
>
>
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