[16v] hard start, bucking/bogging off idle

[dswalterwi at gmail.com (Don Walter)]

3. Bad ground or deteriorated grounds.


On Sun, 28 Nov 2004 23:08:05 -0500, Roger concha <rogercv1@gmail.com> wrote:
> 2 things pop into my head from this.
> 
> 1. cold start valve
> 2. O2 sensor
> 
> 
> 
> 
> On Sun, 28 Nov 2004 19:56:07 -0800 (PST), T. Reed <treed2@wsu.edu> wrote:
> > Well, my Scirocco finally realized that winter is here and it's time to
> > start behaving erratically.
> >
> > She was running like a honduh owner to a stack of free decals, up until
> > I put the snow tires on. Suddenly, things have gone to crap.
> >
> > When I get in and turn the key, the engine spins over at normal speed,
> > About every sixth or so 'wuh' in the wuh-wuh-wuh-wuh cranking noise is
> > followed by a single firing of the engine. But it takes 1 to 3 sets of
> > fifteen to twenty wuh-wuh-wuh's before it will fire twice in a row, and
> > start. After that, it seems to idle fine.
> >
> > No battery problems are apparent; lights dim when cranking but no more
> > than they always have. The torch-soldered 4 gauge underhood wiring and
> > grounds are 3 months old. Battery is also only 3 months old. Engine seems
> > to crank at normal speed.
> >
> > Plug wires seem to be seated fine in the valve cover and on the dist. Hall
> > sender and dist are relatively new (~3-4 years old now), the wiring looked
> > okay in a visual inspection, coolant temp sender wire hooked up. That's
> > all I checked because its 23 F outside and windy.
> >
> > Anyway, after it gets started, it does this thing while coming off idle.
> > Sometimes, when you step on the gas, it will sound like its trying to
> > drive straight up a wall (the engine sounds very loaded down), then if
> > you let off the gas it returns to normal and it will usually go if you
> > step on the gas again (although 1 in 10 times it will die instead).
> >
> > If you just keep your foot on the gas instead of letting off, it will
> > typically recover in about 3 to 5 seconds and kind of buck a little,
> > sometimes with a little pop noise (not quite a backfire; it might even be
> > the motor rocking in its mounts), then accelerate like crap as if it had
> > lost a cylinder or two. Letting off the gas and "trying again" seems to
> > alleviate the problem 90% of the time.
> >
> > I thought at first that it might be due to bad gas from filling up at a
> > different gas station than I usually do (or maybe I put 87 in by
> > accident). I filled up with Chevron 92 after running it down to 1/8 tank
> > or so. It bucked again on the way out of the gas station (expected since
> > the old gas was still in the fuel lines), but seemed to run a lot better
> > for a while after that. Didn't have the problem at about 8 or 9
> > stoplights in a row, so I figured it was gone. But I guess I was wrong,
> > because its been happening again, although less frequently and with less
> > vigor.
> >
> > When cruising at high RPMs the car behaves pretty much normally, except
> > about 5% of the time when I mash the gas to pass somebody, it bogs for a
> > fraction of a second then recovers immediately. Otherwise, normal
> > acceleration, etc.
> >
> > So... who's had this problem before? :)
> >
> > Where should I look first..? It's too cold to go out there and blindly
> > poke around. :)
> >
> > Thanks
> >
> > -Toby
> >
> > BTW this is a 2l 16v with vanilla cis-e
> >
> > _______________________________________________
> > Scirocco-l mailing list
> > Scirocco-l@scirocco.org
> > http://neubayern.net/mailman/listinfo/scirocco-l
> >
> 
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> 


-- 
Don Walter - Waukesha, WI
1986 1.8 16V Black Scirocco
1986 2L 16V Toronado Red Scirocco (under repair)
1988 1.8 16V Toronado Red Scirocco (sold on 3/29/04)
1984 1.8 8V Pewter Scirocco (sold years ago)
1971 Karman Ghia (sold)
1969 Karman Ghia (sold)
1969 Beetle (sold)