[Vwdiesel] More Quantum Questions/

[mark shepherd]

Bill,
Don't worry about minor leaks on the injector off take lines etc, untill all 
is great, as you may need to swap them out and begin sealing leaks all over.
By fuel going back to the tank, I'm mainly concerned with, after shut down, 
does the transparent fuel supply to the pump syphon back either through the 
pump, or fuel filter.  This would cause you to need to 'reprime the pump' 
again.
On a fully functioning pump, this only takes seconds, as the high pressure 
lines do not drain back, and the lift pump only needs to pressurise the 
remaining fuel, to continue injecting.
Try and get the engine noise to  clack a bit, which is near to the ideal 
operating point. The cold start lever merely rotates a 'wedge' that pushes 
the timing piston, and I don't think that can be wrong , unless the wedge 
part is missing somehow.
This is not really important though, as I find my car doesn't need the cold 
start, and indeed has not been connected for at least 2 years, including 
winter temps of -13 deg C.

What break pressures did you get you injectors set to in the end? The lower 
the pressure, the more advanced the injection is, and changes the required 
mm setting on the pump.

Regards

Mark
----- Original Message ----- 
From: "William J Toensing" <toensing at wildblue.net>
To: <vwdiesel at vwfans.com>
Sent: Wednesday, July 14, 2010 11:20 AM
Subject: [Vwdiesel] More Quantum Questions/


>
> Reply to Mark Shepherd. Did not notice any bubbles in the intake line. I 
> did find some fuel leaking from the # 3 & # 4 injectors but replaced the 
> line. Engine revs nicely but when stopped, will not start immediately. 
> Tried that on a hill knowing I could restart by coasting.Fuel does return 
> to the fuel tank. The  at times did not return to idle but continued 
> running at an estimated 2000 RPM.
> One other possibility. The lever on the IP on the cold start control was 
> missing so I had to take the lever from my other IP. It moved OK from the 
> front to back stop but I wonder if I could have done this wrong. Will that 
> cold start shaft rotate more than the movement allowed by the stops? In 
> installing the lever, I assumed that the cold start shaft was in the warm 
> or normal run position.
> Bill Toensing, Nevada City, CA
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