CIS gurus, please advise (tech)...

[raveracer77 at yahoo.ca (raveracer77)]

    I had a spring get loose in the MAF plate assembly and go missing.  I never did find it but used a string tied to the arm on the plate to open fuel to get me home.  I don't recommend driving like this as I had to regulate fuel pressure by hand while driving, keeping tension on the string and tighten it while accelerating and dropping it between gears.  What I'm trying to say is that spring wasn't resting against whatever it was supposed to be to provide resistance.  My dorm mate's Fox is in the same situation but opposite, the plate is to far open at any given point.  I'm just going to try to buy a whole new assembly to fix his.  I bought a whole new air box top from a GTI to fix mine originally.  The other thing I found out by taking a dead one apart is that some of those fittings have screens in them.  I think there is a screen in the center of one of those fittings that is specific to the main injectors and doesn't have anything to do with the Idle injector.  Good luck.

      Rave Racer
'81 Scirocco Mk1 1.8L 8V Digifant 2
'89 Jetta 1.8L 16V GTX  gone but not forgotten
'87 Audi 4000 Quattro Sedan 
 http://www.audifans.com/registry/view.php?action=viewCar&carid=110
'72 Triumph GT6
 http://www.triumphowners.com/uploaded/34/50-50-111014_20raveracer-gt6-1.jpg
'83 Toyota Tercel (yoda)    ...because it was free
 
http://spaces.msn.com/raveracer77/photos/ 
  ----- Original Message ----- 
  From: Chris 
  To: scirocco-l@scirocco.org 
  Sent: Wednesday, August 23, 2006 07:33 PM
  Subject: Re: CIS gurus, please advise (tech)...


  Initially sees like vapor lock, but if it sat for a day, that should 
  have cured it.

  Sticky Plunger? Isn't there a direct line of fuel to the cold start
  injector? That could explain why the cold start injector had fuel, but
  not the others. If I recall correctly, the plungers are matched to the
  specific fuel distributor. That suggests that a tiny bit of debris could
  mess up the FD. Maybe cleaning the plunger and its path might be one
  thing to try.  That's my theory, anyway.

  Chris

  Allyn wrote:
  > Fellow listers,
  > 
  > OK, so the Rieger is playing games with me as of late.
  > 
  > Background: A few months back, on a particularly hot day, wouldn't
  > start after being shutdown hot for 5 minutes.  Gave an initial
  > sputter but no continuous fire, suggesting there was some fuel, but
  > not continuous.  After 10 more minutes of waiting, fired right up.
  > Problem did not reappear until recently (below).
  > 
  > Problem: After filling up on gas (also a pretty hot day, a few weeks
  > ago), no start.  Acting identical to last time (brief sputter as 
  > cranking begins, but no complete start).  I let it sit for a day - no
  > dice.  Have to pull 'er home from the base.  Weeks go by - still no
  > dice.  I start troubleshooting:
  > 
  > - spark perfect (as suspected). - Cracking a fitting loose reveals
  > cold start injector has full fuel pressure and flow supplied from
  > fuel distributor. - Cracking an injector line fitting loose reveals
  > no (0) fuel pressure or flow from the injector line outlet of the
  > fuel distributor. - I crack the other 3 lines - same result. - With
  > all 4 lines cracked, and the air flow sensor plate lifted, I cycle
  > the fuel pump again - no flow.  I note that sensor plate does not
  > appear to have 'normal' resistance to lifting (it has significantly
  > less). - In this condition, I crack the cold start injector line
  > again - plenty of pressure and flow. - I lower plate, secure fuel
  > pump, allow all pressure to bleed away through cold start line.  I
  > then lift the plate.  Doing so causes further fuel to come from the
  > cracked fitting (from the top of the control plunger I assume - the
  > volume seemed sufficient).
  > 
  > So... I'm thinking DPR, but I've honestly never seen one fail in such
  > a manner.  It would have to have failed completely shut (or for some
  > reason being given full reverse current from the controller), in
  > order to cause these symptoms.  Is there some other path through the
  > fuel distribution block that I should check on?  Any other imput here
  > is welcome, as I intend to tear into it further in the morning.
  > 
  > Thanks in advance Al
  > 
  > 
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