Re: More on CIS Fuel problems/questions

["Sal Guzzo" <pellom@yorku.ca>]

Someone can correct me if I'm wrong but, even though you hear the pump
running it may be bad.  The easiest way to check the pump is by
disconnecting the fuel line going into the fuel filter. Then bridge the fuel
pump relay for a coupla seconds and see if fuel squirts out.  I had the same
problem with my rocco. I thought that the fuel pump was good since I heard
it running.  However, upon disconnecting the above fuel line, no fuel was
being sent to the fuel filter.  Hence, fuel pump was fuct. As soon as I
replaced it, the story ends just like a fairy tale. The car ran great but
the fuel lines decided to srping a leak. lol!

HTH

Sal

----- Original Message -----
From: S.Coleman <deadbolt@mindspring.com>
To: scirocco group <scirocco-l@scirocco.org>
Sent: Saturday, January 06, 2001 10:33 AM
Subject: More on CIS Fuel problems/questions


> OK,....let me see if I understand this correctly and you guys and gals
tell
> me where I might have strayed.  (Car in question is 78 CIS Scirocco :~)
If
> the fuel pump is running, and you take the braided hose from the fuel
filter
> and fuel comes gushing out....the fuel pump is *at least* pumping.  If I
> pull an injector and *don't* lift the air sensor plate....should fuel
spray
> from the injector.  My understanding is NO.  If it does,...then either the
> injector is bad...i.e.. not able to withstand pressure from the fuel
> distributor OR the fuel pump isn't able to "pump" fuel with enough
pressure
> behind it.....OR the fuel pressure regulator isn't able to put enough
> "control" pressure on the control plunger allowing the plunger to rise
> releasing fuel into the fuel lines and out of the injectors.  I really
doubt
> that all my injectors went bad at the same time?  (not that it couldn't
> happen?)  Plus,...all the cold start injector diagnosis from the Bentley's
> and the FAQ from .org test fine.......but still I have no fuel coming from
> the cold start valve.  hmmm?  Something tells me that the fuel pump is
> dying...(does seem a bit more loud than either of the two on my 16v's)
But
> the bolts on the FPR are a bit worn like they have been taken off a time
or
> two......which leads to the other guess......Anyone tell me if my thinking
> is close or at least on the right track here.  BTW,...I picked up the
BOSCH
> FI book last night........very insightful.....but I could get more from it
> if I had a working fuel distributor.
> Thanks,
> Chris
>
>
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