[T3] Fuel Mixture

Jim Adney jadney at vwtype3.org
Tue Mar 15 17:05:19 PDT 2011


On 14 Mar 2011 at 23:42, Adriel Rowley wrote:

> > From: jadney at vwtype3.org
> > On 14 Mar 2011 at 14:33, Adriel Rowley wrote:
> >
> > > When romping the throttle, fuel mixture goes from 13.8 to as high as
> > > 14.5. Do not know how accurate the latter figure is, but figure the
> > > fuel mixture should get richer right?
> >
> > WIthout load, just standing still, you won't see much change. So that
> > sounds pretty normal, but that's just my guess. Keith's sensor is
> > mounted so that he can see the results at any time, while driving, so
> > you probably won't be able to duplicate his numbers.
> >
> Well there is still a spike in vacuum pressure right?  How would load 
> have any affect?

There's a change in vacuum, but it's not as large, nor as long 
lasting, as it would be under load. Think about the difference in 
what happens when you floor the throttle with the car standing in the 
driveway and when you floor it in 4th gear while going 30 mi/hr.  

-- 
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Jim Adney, jadney at vwtype3.org
Madison, Wisconsin, USA
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