[Vwdiesel] replacement engine, fuel return issues

[James Hansen]

There's either a supply line restriction, major air leak into suction side,
or the pump vanes are stuck.
Sticking pump vanes are pretty common on ve's that sit for a long time.
Usually they free themselves when you give it some revs, but a pump full of
diesel purge, or similar won't hurt either.. Get it full, and let stew, then
try it, let it warm up, and blip it up to redline a few times.... like you
would when checking the high idle stop.
-james

> -----Original Message-----
> From: vwdiesel-bounces at vwfans.com [mailto:vwdiesel-bounces at vwfans.com]
> On Behalf Of raymond greeley
> Sent: Saturday, April 03, 2010 5:34 AM
> To: vwdiesel at vwfans.com
> Subject: [Vwdiesel] replacement engine, fuel return issues
> 
> 
> Hello All,
> 
> 
> 
> I am having a fuel return and fuel pressure issue with a motor that has
> sat in storage.
> 
> 
> 
> History. It is a used motor that ran good on the bench:
> 
> started easy, idled smooth and had a steady stream of fuel
> 
> return.
> 
> 
> 
> advance forward 16 months to install the motor and i find the following
> condition. It still starts easy, though unless i intermittently turn on
> an elec fuel pump that i have on the fuel supply line it will not pump
> on it's own enough fuel to stay running or have a return fuel flow.
> 
> 
> 
> the installation is still in progress and so i don't know how
> 
> it is operating with the elec fuel pump on and driving the car.
> 
> 
> 
> I work on the project in 3 +/- hour intervals and run it, get it
> 
> hot thinking this in some way will begin to wake it up after such a
> long time of hibernation.
> 
> 
> 
> this is a diesel swap into a cabrio that had an automatic trans and so
> I am working through other issues such as shift linkage along with
> finding the correct axle shafts, and correcting some electrical issues
> that ultimately where the cause of the gasser eng. failure. nothing
> big, just a little time.
> 
> 
> 
> Is there a fuel treatment that might be added and run through before i
> begin a fuel solenoid cleaning or some other service to the IP.
> 
> 
> 
> thanks, ray
> 
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