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16v barely running, anyone got some advise?MORE ONTHISSUBJECT...
If you're engine is going super rich then I would think it would either be the cold start injector
opening (for whatever reason) or your engine temp sensor failing and telling the ECU your engine is
cold when if fact it is at operating temp.
Air/fuel ratios can be very rich and the engine will still run. So, if it's rich enough to actually
kill the engine then there is a shitload of gas being injected and I doubt that a failed O2 sensor
can cause that.
Next time it does it I'd unplug the cold start injector and see if that helps.
Dan
----- Original Message -----
From: "A J" <asbfooh@yahoo.com>
To: "Eric S" <scirocco@vintagewatercooleds.com>; <scirocco-l@scirocco.org>
Sent: Monday, February 23, 2004 2:29 AM
Subject: Re: 16v barely running, anyone got some advise?MORE ON THISSUBJECT...
> Eric , its running and then dying out but only after
> its warmed up , so what I was thinking was the O2
> warms up and then kicks in and dumps too much fuel in
> making it pour smoke out the exahust and sounds like
> its running on 1 cylinder and then dies , the plugs
> were black the first time it did this and I had
> checked the plugs about a month before that and they
> were perfect , this time it died and then I waited for
> things to cool (over 2 hours) and then it started ,
> blew out some extra smokey exhaust and then I drove
> home , thats why I'm thinking O2 sensor , I guess it
> could even be my Cat too causing problems (??) -Aaron
>
>
>
>
> --- Eric S <scirocco@vintagewatercooleds.com> wrote:
> >
> > This is going to be difficult to diagnose. If you
> > feel its a spark
> > problem, then get the car to do it again (keeping
> > close to home) and then
> > pull the plugs and check for spark.
> >
> > I have a nagging feeling its a fuel issue though. I
> > had damn near exact
> > symptoms with an 8v...granted, toally different fuel
> > system (well, CIS,
> > but the electronics are different). Mine, turned
> > out to be a case of
> > water in my ECU causing wierd shorts (man those
> > automated pressure car
> > washes can get water in interesting places).
> > Basically, my CPR
> > (functional equvalent to your DPR) was just, turning
> > off and the car would
> > loose power, only run on full throttle and
> > eventually just shut down.
> >
> > In my case, I figured it out when I had it idling
> > fine and I heard the CPR
> > stop buzzing all a sudden and the car died. You're
> > gonna have to get a
> > bit more scientific, and that means getting the car
> > to do it, while you
> > have your Bentley and tools, and start checking
> > things out. If the car is
> > still firing the plugs, then I'd check your DPR
> > current next...it almost
> > sounds you're going into a too rich or too lean
> > situation. Alas, I have
> > little working knowledge of the CIS-E quirks, and I
> > only know to tell you
> > to check DPR current cause I see it talked of so
> > often in relation to fuel
> > mixture on 16v engines.
> >
> > Bentely is your friend here...get the car to break,
> > and start running the
> > tests man.
> >
> > BTW, have you replaced your transfer pump lately?
> > (just a wild guess)
> >
> > --
> > Eric
> > www.vintagewatercooleds.com
> >
> > 79 VW Iltis
> > 81 Rabbit Truck 2.0 16v
> > 81 Scirocco S (TDI Swap project)
> > 90 Corrado TDI
> > 91 Cabriolet (2.0 Crossflow swap project)
> >
> > A J said:
> > > So I my 16v broke down awhile back (so I thought)
> > on
> > > me and I changed the cap rotor and plugs and it
> > > wouldnt start , got it towed back to the house and
> > > then the next morning it starts (?) So I've been
> > > thinking everything is cool and then I take about
> > a 25
> > > minute drive outa town andthe car strats loseing
> > power
> > > and then dies , so I'm sitting there with no tools
> > and
> > > no book , what can I do ? I check my cap and rotor
> > > again , it looks ok , I check my coil and clean
> > the
> > > connections with a rag , maybe something is over
> > > heating and then not working ? I waited about 2
> > hours
> > > and finaly it starts !!?? Thats when I realize I
> > think
> > > the O2 sensor is going , can anyone agree with me
> > on
> > > this ? Thanks , Aaron in San Jose -
> > >
> > >
> > >
> > >
> > >
> > >> > > > Well , just as I get my custom short shift
> > >> > > installed
> > >> > > > and get on the highway to pick up the kid ,
> > my
> > >> 16v
> > >> > > > starts to shug and feels like its running
> > out
> > >> of
> > >> > > gas ,
> > >> > > > I pull off the highway and the car dies , I
> > >> turn
> > >> > > it
> > >> > > > over and it starts only with my foot on the
> > >> gas
> > >> > > and it
> > >> > > > sounds like its running on 1 cylinder with
> > >> some
> > >> > > smokey
> > >> > > > exhaust , I can hear my fuel pump come on
> > with
> > >> the
> > >> > > key
> > >> > > > and the gas smells like fuel so it must be
> > >> getting
> > >> > > gas
> > >> > > > , luckilly I'm a block from an auto parts
> > so I
> > >> go
> > >> > > over
> > >> > > > and get some plugs cap and rotor and just
> > go
> > >> for a
> > >> > > > tune up , double check the parts and put
> > them
> > >> in ,
> > >> > > the
> > >> > > > car starts right up but then is just
> > >> sputtering ,
> > >> > > same
> > >> > > > deal as before , so I'm back at my house
> > and
> > >> the
> > >> > > car
> > >> > > > is towed back , I looked thru my book for
> > >> trouble
> > >> > > > shooting , the car ran fine this morning ,
> > >> could
> > >> > > this
> > >> > > > be an ignition problem ? maybe my coil or a
> > >> > > problem
> > >> > > > with the distributor ? Aaron in San Jose -
> > >> > > >
> > > --- A J <asbfooh@yahoo.com> wrote:
> > >> how do you check the fuel pressure ? -Aaron
> > >>
> > >>
> > >>
> > >>
> > >> --- Brian McGarvey <brianm@earendel.org> wrote:
> > >> > Its a thing inside the distributor, that is a
> > >> > non-replacable item that
> > >> > usually breaks. Its a magnetic pickup that ells
> > >> the
> > >> > computer system where
> > >> > the engine is and starts the ignition process
> > >> >
> > >> > remember
> > >> > Fuel -- check fuel pressure
> > >> > Air -- check compression
> > >> > spark -- check timing
> > >> > brian
> > >> >
> > >> >
> > >> > On Thu, 5 Feb 2004, A J
> > >> > wrote:
> > >> >
> > >> > > whats the hall sender ? thanks , Aaron -
> > >> > >
> > >> > >
> > >> > >
> > >> > >
> > >> > > --- Brian McGarvey <brianm@earendel.org>
> > wrote:
> > >> > > > My scircco sense says thats it prolly the
> > >> > > > distrubutor..
> > >> > > > $200 the hall sender is prolly toast.
> > >> > > > brian
> > >> > > >
> > >> > > >
> > >> > > > On Thu, 5 Feb 2004, A J wrote:
> > >> > > >
> > >> > > > > Well , just as I get my custom short
> > shift
> > >> > > > installed
> > >> > > > > and get on the highway to pick up the kid
> > ,
> > >> my
> > >> > 16v
> > >> > > > > starts to shug and feels like its running
> > >> out
> > >> > of
> > >> > > > gas ,
> > >> > > > > I pull off the highway and the car dies ,
> > I
> > >> > turn
> > >> > > > it
> > >> > > > > over and it starts only with my foot on
> > the
> > >> > gas
> > >> > > > and it
> > >> > > > > sounds like its running on 1 cylinder
> > with
> > >> > some
> > >> > > > smokey
> > >> > > > > exhaust , I can hear my fuel pump come on
> > >> with
> >
> === message truncated ===
>
>
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