[Vwdiesel] More Quantum Questions? Injection pump

mark shepherd mark at shepher.fsnet.co.uk
Sat Feb 28 04:23:02 PST 2009

Before you get over excited and throw more money uneccessarily away.
Undo the fuel lines at the injectors. Lift nuts away. Crank engine to see if 
you get fuel coming out of lines. Don't worry about  zillion's of psi  etc. 
An open tube generates no more than a few psi at best, and the volumes are 
less than a petit pois. If you get fuel out. No fuel? then remove inner of 
stop solenoid.
Next is to check by hand cranking with a wratchet that the pulse of fuel out 
of #1 injector line coincides with with TDC for #1 and with the cam lobes 
showing compression stroke [ If a rocker baffle is installed you need to 
remove the rocker cover, otherwise lobes are visible through the oil filler 
Do these things and then come back with the results....

With the 'parts place' look for the forum not the parts list [unless you 
need something]

 Original Message ----- 
From: "William J Toensing" <toensing at wildblue.net>
To: <vwdiesel at vwfans.com>
Sent: Saturday, February 28, 2009 6:02 AM
Subject: [Vwdiesel] More Quantum Questions? Injection pump

> Finally got the big "O" ring between the IP & the back of the IP, which I 
> think is called the "distributor block". I made a mistake by removing the 
> fuel cut fuel solenoid. In replacing, I mashed the little coil spring so I 
> robbed another cut off switch from another IP I have. Problem is, the 
> Quantum won't start, even after bleeding the IP with my Harbor Freight 
> hand vacuum pump, as I did before replacing the "O" ring. Do I "bite the 
> bullit" & have my pump rebuilt or do you have some suggestions? Any good 
> diagrams on line that show how the IP is assembled? I suspect the problem 
> might be with the fuel cut off switch.
> Bill Toensing, Nevada City, CA
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> Vwdiesel at vwfans.com
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