[Vwdiesel] Pump

[Rudy]

Mine idles fine, a little too fast but smooth, the problem is when I first
take off in low gear and when I first step on the gas.  I'm working with it
and will eventually figure it out and will let you know what I come up with.
I have another Pump but I'll mess around with this one for a while before I
switch them.

It almost acts like the cable could be binding a little when you first
depress it but I'm pretty sure it's free.

Rudy 

-----Original Message-----
From: Bob Soukup [mailto:bobs at chemdec.natsci.csulb.edu] 
Sent: Tuesday, July 10, 2007 10:49 AM
To: Rudy; vwdiesel at vwfans.com
Subject: Re: [Vwdiesel] Pump

Rudy,

My '81 Rabbit Truck has been "suffering" with something similar to what you
describe ever since I had the inj pump overhauled a number of years ago.  I
would describe what mine does as "hunting" for a stable idle speed.  When
the pump came back from the overhaul the idle was set very high.  I had to
back the idle screw out almost all the way to get a reasonable speed.  I
finally set the idle a little fast so the truck doesn't vibrate so bad with
the AC running.  The idle still hunts with no load, keeping the headlights
on loads enough to calm it down.  
If/when you figure out what is causing your problem, please let me know.

--
Bob Soukup


You Wrote:

I just changed Head Gasket, Timing Belt ect. on an 81 Rabbit, new seals on
Cold Start and Input Shaft.  Timed it around .98mm.  It idles fine and
smooth, when I start out and first step on the trottle it wants to rev
higher and back down and doesn't stay stable.  No other way to describe it.
 
It acts kind of like a gas car that is timed to far advanced.  It revs a
little ahead of the trottle if that makes any sense.  Once I get going at
speed or a little higher trottle position it seems to smooth out and goes
down the road fine.  Almost seems to me like the advance in the pump is
coming in to early or at least feels like it anyway.  I hope this makes
sense to someone.  Wondering if initial advance is set to high for this
pump.  ??
 
Rudy