This is a classic symptom of fuel pressure problem, either the pump or regulator is bad and I don’t care if they are new.  New stuff does not mean they are good.  Most often it’s the regulator.  Squeezing the return line boosts the pressure in the system that’s why it runs fine when you do that.

> On Apr 30, 2016, at 12:00 AM, Automatic digest processor <LISTSERV@GERRY.VANAGON.COM> wrote:
> 
> Update to all:
> Changed fuel pump made no difference in performance .
> Took injectors out to dbl check spray pattern on new GOWESTY (2000 miles) in=
> jectors. This is what I found out. Spray pattern is droplets. We then checke=
> d them again by clamping of the return fuel hose to tank and the spray patte=
> rn is  nice an atomized. When the return line is clamped off engine runs per=
> fect and idles perfect.
> I have a new fuel regulator installed, all new fuel lines to the injectors. I=
> checked the idle stabilizer control unit sprayed all  the contacts and clea=
> ned them. No change,so that seems good.
> New fuel filter also.
> Thoughts?
> And the saga goes on

Cheers,    

Frank Condelli
Almonte, Ontario, Canada
'87 VW Westy, '00 Kawasaki 250 Sherpa, "98 Ducati 750 Monster & Lionel Trains (Collection for sale <http://frankcondelli.com/trainsal.htm>)
Frank Condelli & Associates <http://www.frankcondelli.com/> - Vanagon/Vanagon Westfalia Service in the Ottawa Valley
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