5ktq CIS problems still...

[Bernard Littau]

Hi John,

Sounds like your fuel _flow_ is a problem.  Have you done the fuel flow
test?

I realize that with a new fuel filter and a replaced fuel pump you have
already addressed the two most likely reasons for poor flow.  Still, it
sounds to me like the pressure is dropping as the flow increases, to the
point where some of the injectors shut down.  They are supposed to do that
to maintain pressure when the car is off.

You may want to inspect your fuel line from the filter back to the pump and
see if there are any imperfections; perhaps the line is crushed somewhere.
The fuel accumulator is also outside of and under the car near the right
rear wheel.  Perhaps it is clogged.

Best,

Bernard Littau
Woodinville, WA
'88 5ktq

> -----Original Message-----
> From: John Forbes [mailto:John at craincorporated.com]
> Sent: Tuesday, July 22, 2003 6:57 AM
> To: Bernard Littau
> Cc: quattro at audifans.com
> Subject: RE: 5ktq CIS problems still...
>
> Isn't CIS a problem in itself ;-) ? Well it goes like this. I bought the
> car over the net, from a couple in Nebraska. Original owners, wifes car
> (nice to know it wasn't beat too bad), husband did regular maintenence.
> They said it ran great, and they seem pretty honest about the whole deal,
> were more then willing to tell me everything that wasn't right on the car
> as much as whatever was good.
>
> >From the minute it got here it has had a problem with runability. It
> seemed that anytime you open the throttle enough to get to about .9bar it
> would drop to maybe 3 cylinders. I called the people I bought it from they
> said it had been sitting a little while, so I figured bad gas. I pumped
> out the tank and changed the filter, got some water in the old filter too.
> But it didn't fix. So I put the fuel pressure gauges on it and got about
> 4bar. Thought this was low but was unsure so I pulled the injectors and
> lifted the airflow plate, got good flow at low positions, but as I raised
> it some injectors would stop firing. This is where I'm stuck.
>
> I started by swapping to another fuel dist. that came off a running car,
> and that didn't help any. Then I noticed that it wasn't keeping the
> controll pressure low when it first turned on, so I changed the warmup
> regulator. That didn't help, but then I noticed that every time I would go
> to work on the car I had a little bit less fuel pressure. I started by
> double shimming the piston spring in the fuel dist., which got me up to a
> good clean 6.4bar, but again it started losing pressure. I went to change
> the pump and got a good surprise as the car had been "upgraded" to the 200
> 40mm pump, which is $50 more expensive then a $200 60mm 5000 pump. I had a
> 60mm pump here so I retrofitted it back to the older pump, and still only
> have arround 4 bar of pressure. Also all 5 injectors flow fine on my test
> bench, but for good luck I even bought 1 new one and put it on. I had
> basically given up on it and just decided to park the car until my new
> injectors and rail stock get here so I can c!
>  onvert it to EFI like my last 5k, but I am supposed to go to a wedding
> this weekend and thats my only "running" car that I can take.
>
>
> -Cody
> '86 5ktq - Still having CIS problems
> '88 80 4cyl
>
> ---------- Original Message ----------------------------------
> From: "Bernard Littau" <bernardl at acumenassociates.com>
> Date: Mon, 21 Jul 2003 16:52:01 -0700
>
> >Hi John,
> >
> >I've been a bit sporadic following the list lately.  What kind of CIS
> >problems are you having wit your 5ktq?
> >
> >Bernard Littau
> >Woodinville, WA
> >'88 5ktq
> >
> >> -----Original Message-----
> >> From: quattro-admin at audifans.com [mailto:quattro-admin at audifans.com] On
> >> Behalf Of John Forbes
> >> Sent: Monday, July 21, 2003 4:27 PM
> >> To: quattro at audifans.com
> >> Subject: Re: was: brit gp now: people on track
> >>
> >> I have a video called "Secrets of Speed". Its from the early '90s. The
> >> beginning is a bit messed up because the tape wasn't stored well, but
> >> theres
> >> no cars on the Autobahn that I've seen. It does however have GREAT
> footage
> >> of the type 44 at Talledega, the Trans Am cars, and the IMSA cars. Also
> >> some
> >> really great interviews with Hans Stuck. Actually now that I remember
> the
> >> beginning even has rally footage, including Pikes Peak, and that
> section
> >> is
> >> full of interviews with Michelle Mouton. Good stuff. I wish I had the
> >> equipment to digitise it and post it on my server for whoever to see.
> >>
> >> -Cody
> >> '87 5ktq - Still having CIS trouble
> >> '88 80 4cyl
> >>
> >>
> >> > > Date: Mon, 21 Jul 2003 08:32:22 -0700 (PDT)
> >> > > From: james accordino <ssgacc at yahoo.com>
> >> > > Subject: was: brit gp now: people on track
> >> > > To: Wylie Bean <TheRingmeister at triad.rr.com>, quattro at audifans.com
> >> > >
> >> > > That guy has serious issues.  Does anyone remember a
> >> > > video of 3? track guys trying to cross the main
> >> > > straight at Malaysia?  As cars approach at 200+ mph?
> >> > > 3rd person doesn't quite make it and becomes about 3'
> >> > > taller as he flies through the air.  Gruesome stuff.
> >> > > Also, what's the video with Audi on the autobahn
> >> > > driving really fast from late 80's to mid 90's?  I
> >> > > think I saw it on Speed.  "Secrets of Speed"?
> >> > >
> >> > > Jim Accordino
> >> > >
> >
> >
> >