Re: [T3] Still Blowing the Fuel pump fuse

["Jim Adney" <jadney@vwtype3.org>]

On 12 Aug 00, at 14:09, I4VW@aol.com wrote:

> In a message dated 8/12/00 12:39:48 PM Eastern Daylight Time, henryvw@ij.net 
> writes:
> 
> << but when I accellerate  the fuse blows >>

> I don't claim or pretend to know about electric fuel pumps, but like anything 
> else electrical, an increased load (accelerating) draws more current. Right? 
> Which would cause the fuse to blow. The fuse is the correct rating for the 
> pump, isn't it?

You are correct in general, but on our FI systems the load on the 
pump is constant due to the way the regulator works (ie, it's a shunt 
regulator so the pump pressure and volume are both constant.)

The pump fuse should be a red one, 16A, although I think I usually 
measure more like 4A when I test these.

The current WOULD go up with increasing voltage, so this could be the 
key since the generator does little at idle. The voltage increase 
from 12V to 14V might push it over the edge. Or the system voltage 
might be going too high, but this would be very unusual. I've never 
seen it happen.

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