Re: [T3] Wacky Mileage

[Jim Adney <jadney@vwtype3.org>]

On 20 May 2004 at 12:18, wodkowski@mac.com wrote:

> There's the charging system - my battery isn't completely charged but how
> much does that matter once I'm up and running. Otherwise it puts out about
> 13 V when running (checked from fusebox). 

This sounds low, but it's really hard to tell from the fuse box because the 
voltage there is dependent on so many other things, like which accessories you 
have turned on. If you're only getting 13V with nothing else on, even at medium 
to high rpm, then this is too low and it will explain your poor gas mileage.

Another way to check, that's easier than measuring the voltage at the battery, 
is to measure the voltage AT the generator, from the D+ terminal to ground. 
That voltage will read a bit high, so if it is 14.5 or so, then you're probably 
fine. If it's below 14 you have a problem. All measured at med to high rpm, of 
course.

-- 
Jim Adney
jadney@vwtype3.org
Madison, WI 53711-3054
USA

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