OT - b3 16v passat issues - the saga continues

[amalventano at sc.rr.com (Allyn)]

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.
>>
>>
>> _______________________________________________
>> Scirocco-l mailing list
>> Scirocco-l@scirocco.org
>> http://neubayern.net/mailman/listinfo/scirocco-l
>
>
> _______________________________________________
> Scirocco-l mailing list
> Scirocco-l@scirocco.org
> http://neubayern.net/mailman/listinfo/scirocco-l
>