Fw: Electrical gremlins, continued...

["Dave & Carol" <dcewing@prodigy.net>]

Just worked on a Jetta that had the same problem.  After a tune up and
Air/fuel ratio adjustment it ran better but still bucked.  It also had an
exhaust leak so once I fixed that, I could hear the fuel pump chunking away.
Very loud and on/off irradically.  Check the pump!!

Dave

> The fuel filter was replaced in the summer.  It wasn't the cleanest in
> there, but it didn't seem too bad either.  To be on the safe side, I have
> taken the precation of only draining the tank halfway.  The bucking
> continues through the entire range except at closed throttle, but it's at
> its worst in the 2.5 - 3.5k range.  I don't hear any relay clicking,
> either.
>
> I am inclined to think the problem is electrical since (until recently)
> it would go away with a load on the electrical system, such as the
> headlights.
>
> B.
>
> '82 Scirocco (a.k.a. "Fritz")
> '85 Jetta
> GO HOKIES!!!
>
> On Mon, 03 Jan 2000 22:26:13 PST "Chris DeLong" <green536@hotmail.com>
> writes:
> > Have you replaced the fuel filter? Does it stop bucking at higher
> > rpms? You
> > could have some bad grounds uder the dash or on the intake manifold.
> > Do you
> > hear relays clicking when it does this? I had a similar problem with
> > my
> > wifes jetta ('82) and I put an 0 gauge cable from the battery to the
> > body
> > and it helped quite a bit. HTH
> >
> >
> > >From: Brian C Barrows <ferret100@juno.com>
> > >To: scirocco-l@scirocco.org
> > >Subject: Electrical gremlins, continued...
> > >Date: Mon, 3 Jan 2000 21:08:37 -0500
> > >
> > >I asked about this a few months ago, but let's recap:
> > >
> > >My Scirocco has been bucking for quite a while, around 2500 - 3500
> > rpm.
> > >My fuel-air gauge showed that the mixture would cycle between
> > normal and
> > >lean at about 1.5 cycles per second.  I have made it my mission to
> > solve
> > >this problem.  I replaced all of the vacuum lines, O2 sensor,
> > injector
> > >seals and the control pressure regulator (which was bad).  That
> > didn't
> > >solve the problem, but I found that if I turned the headlights on
> > the car
> > >would run properly.  But once the lights were turned off it would
> > run
> > >like crap again.  No one I have spoken to could figure it out .
> > >Everytime I did some kind of electrical work, the car would buck
> > again.
> > >The solution to the problem would be (I'm not making this up!) to
> > crank
> > >up the idle and the %CO (to minimize the bucking), drive about 30
> > miles
> > >for the car to "reset" itself, and then bring the idle and %CO back
> > to
> > >normal.  It makes no sense, but it works.  I have given up trying
> > to
> > >solve the problem (I found it simpler to just turn on the damn
> > lights!).
> > >
> > >
> > >Two weeks ago I replaced some of the ground cables and the positive
> > >battery terminal clamp, along with cleaning the battery ground.
> > The
> > >problem returned, and this time it wouldn't go away.  I went to
> > test the
> > >control pressure regulator again, and it was working.  I forgot to
> > plug
> > >the regulator back in.  Now the car is running beautifully.  It
> > starts
> > >out a bit rough and runs pretty rich during warm-up, but after
> > about 15
> > >minutes it's running slightly rich.
> > >
> > >Any ideas?  I"m totally stumped by my 2,100 lb brain-teaser.  My
> > attitude
> > >right now is to simply leave the regulator unplugged until the car
> > has to
> > >go into the shop for something I can't fix.  I think the only thing
> > to do
> > >now is sit back and have a Corona...
> > >
> > >B.
> > >
> > >'82 Scirocco (a.k.a. "Fritz")
> > >'85 Jetta
> > >GO HOKIES!!!
> > >
> > >--
> > >Email problems to: scirocco-l-probs@scirocco.org  To unsubscibe
> > send
> > >"unsubscribe scirocco-l" in the message to majordomo@scirocco.org
> > >
> >
> >
> > Chris DeLong
> > ICQ#45030867
> > Seattle, WA USA
> > '80 16V Rag
> > '65 Bus (ugly, but good for campin' W/toaster oven)
> > '82 GLI (with a severely mangled trunk lock thanks to the fucking
> > thieves!)
> > '80 'Vert
> > '61 17 Window
> > '78 Scirocco
> >
> >
> > ______________________________________________________
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> >
>
>
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