OT - b3 16v passat issues - the saga continues

[pilotlars at yahoo.com (Lars Bruchmann)]

hello, i have been following this story, thanks for
writing it all down, i'm still laughing about the
sacrificial rust anode.. and the bottom of the sea
crack.  i'm picturing a robotic proble pulling bits
off the titanic, hahaha.  
you could try re-routing the return line into a large
fuel canister, so see if that is the problem.  but i
too have never heard of a blocked return line.  
i read in my bently, or haines, manual, that the fpr
keeps over pressure fuel from damaging the system
further down the line until the engine starts... my
interpretation is that the engine will idle fine with
it seized.. just my interpretation, i'm a newby to
this CIS system.  
i just had mine apart and in the bathtub.. i had oil
leaking out of it, i guess it wanted me to replace the
paper filter with an oil-soaked K&N model, and this
was its way of hinting that to me.  or not.  
--- Allyn <amalventano@sc.rr.com> wrote:

> so Rick Kellner gave me a deal on a rear fuel
> pump/filter/accumulator 
> assembly (thanks rick!).
> 
>     today i did the swaparoo, then tested by
> blipping the fuel pump a few 
> times. the pump did the typical thing being an empty
> system. it would spin 
> fast during the first few key cycles, then start
> slowing over the next few 
> key cycles as the system pressure builds. but in
> this case a leak started at 
> the outlet of the filter. turned out the filter had
> been a tad chewed from 
> old line install/removal, and was leaking from
> there.
> 
>     swapped on a spare filter, this time no leak at
> the outlet, but i 
> noticed that while priming the system, the pump
> sounded as if it was 
> building up pressure... alot of pressure. enough
> pressure to make the pump 
> run very slowly after about 5 key cycles. on the 6th
> cycle, the side of the 
> filter 'generated' a split and started leaking.
> thats odd, there was not 
> even a scratch on that filter.
> 
>     this time i throw the brand new filter on (the
> one i was saving for 
> after i verified all was ok). cycle the key a bunch
> of times, pump runs 
> slower than i think it should be again. i rap on the
> FPR a few times, no 
> effect. i figure what the heck and start it up.
> engine runs perfect, idles 
> smooth, revs fine (no opportunity to test under load
> though). after about a 
> minute of idling the rubber 3/8" line on the outlet
> of the filter 
> 'generates' a leak, spraying all over. i kill the
> engine, drop the jack, and 
> call it quits for the night.
> 
> so... here is what i think is going on:
> 
> 1. fuel return line is blocked (unlikely, as thats
> the least likely place to 
> block, fuel has been filtered and passed through the
> entire fuel distributor 
> assembly by then, return fuel is usually very
> clean).
> 2. FPR is siezed shut.
> 
> issue with #2:
> will a CIS car really idle and rev correctly with a
> FPR that is siezed shut? 
> i would have though the fuel pressure would be too
> high, and it would at 
> least have a stumbly idle...
> 
> i (hopefully) will get the other fuel system bits
> from Rick, but if that 
> falls through, i'll be begging others for fuel
> stuff.
> 
> stay tuned next week for the continuation of the
> saga...
> 
> Al
> 
> 
> ----- Original Message ----- 
> From: "Allyn" <amalventano@sc.rr.com>
> To: "scirocco list" <scirocco-l@scirocco.org>
> Sent: Friday, September 03, 2004 6:11 PM
> Subject: Re: OT - b3 16v passat issues (parts
> needed)
> 
> 
> > ok, i finally was able to get some time and get
> under the passat. the plan 
> > was to replace the pump / filter. once under it, i
> soon came to realize 
> > that the entire assembly (that holds the fuel pump
> / filter / accumulator) 
> > is holding onto the body of the car literally by a
> thread. the entire 
> > thing seems to have acted as the sacrificial rust
> anode for the entire 
> > car. i swear it looks like it was salvaged from
> the bottom of the ocean. i 
> > started removing the assembly so i could get to
> the pump, but several 
> > fittings, bolts, and nuts all started
> disintegrating in my hands. if i 
> > tear it down enough to remove any of the parts, i
> am pretty sure it wont 
> > go back together without falling apart totally.
> so, on that note:
> >
> > needed: fuel pump/filter/accumulator assembly from
> a b3 passat, preferably 
> > as a whole unit, with fuel/power lines cut as far
> away from it as possible 
> > (all of my in-place fittings are rusted beyond
> re-use).
> >
> > i know there are a bunch of listers with passats
> in their yard... figured 
> > it couldnt hurt to ask around here...
> >
> > thanks for bandwidth
> > Al
> >
> >
> >> At 09:51 PM 08/28/2004 -0400, Allyn wrote:
> >>>Fellow listers,
> >>>
> >>>ok, now for the issues, as interpreted/translated
> from the wife:
> >>>- throughout all of this - engine temp was normal
> >>>- bucked very slightly intermittently. hitting
> gas harder only resulted 
> >>>in engine choking out completely.
> >>>- 30 minutes later, bucking got worse, eventually
> had to pull over.
> >>>- once pulled over, turning off ignition was
> followed by a few seconds of 
> >>>diesel action.
> >>>- wait 10 minutes, start 'er up, purrs like
> kitten, drives fine (even 
> >>>under hard acceleration).
> >>>- ~10 minutes into driving, bucking cycle
> repeats, along with the diesel 
> >>>action on shutdown.
> >>>- went slightly further between bucking events -
> with heat blasting.
> >>
> >>
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> 
> 
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