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Driving with disconnected ISV?



 
 
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  #31  
Old December 8th 04, 04:29 PM
Yvan
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Nedavno Steve Sears pise:

| It sounds like the ISV is indeed working, but the feedback from it

And am I right to assume that there is no vacuum leak, since when I
disconnect electrical connection to ISV, when I stop, rpm does not drop
low to ~600 rpm and then up to ~900 and then to normal 750 as it does
with ISV connected.



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  #32  
Old December 14th 04, 08:25 PM
Yvan
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Nedavno Steve Sears pise:

| And the "Haynes" manual?.......ugggh! When you read "Assembly is the
| reverse of removal" you'll realize why the Bentley Manual is worth the
| extra$ for those who actually do work on their car.

You are right! Just got my Haynes. Not much to help me solve my problem.
There is no information where is located ISV Control Unit for my car. I
wanted to test it according to:

http://www.sjmautotechnik.com/troubl...r.html#mixture

but when I removed driver side parcel shelf I could not find it. There
were only few relay's and connectors.

Anyone knows location of ISV Control Unit on 5-cyl. 1989 Audi 100?




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  #33  
Old December 15th 04, 05:14 AM
Tony
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Bentley says that it should be in the aux relay panel (by drivers left knee
under dash on left hand drive cars). It looks like a relay but is double the
width of a normal relay. Bottom row of relays.

>
> but when I removed driver side parcel shelf I could not find it. There
> were only few relay's and connectors.
>
> Anyone knows location of ISV Control Unit on 5-cyl. 1989 Audi 100?
>
>
>
>

  #34  
Old December 15th 04, 05:27 PM
Yvan
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Nedavno Tony pise:

| Bentley says that it should be in the aux relay panel (by drivers left
| knee under dash on left hand drive cars). It looks like a relay but is
| double the width of a normal relay. Bottom row of relays.
| >
| > Anyone knows location of ISV Control Unit on 5-cyl. 1989 Audi 100?

I looked there, only 4-5 wire connectors and 2-3 relays, none of them
wider than normal. I will look again soon (to cold now).

Or is it different on European models? Anyone from Europe?




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  #35  
Old December 16th 04, 05:48 PM
Steve Sears
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Yvan,
You might want to look close to the relays you have found, in my 1987 5ktq
there are a set of relays accessable by a cover, but there are also some
relays mounted beside them.
Cheers!
Steve Sears
1987 Audi 5kTQ
1980 Audi 5k
1962 and '64 Auto Union DKW Junior deLuxes
(SPAM Blocker NOTE: Remove SHOES to reply)
"Yvan" > wrote in message
...
> Nedavno Tony pise:
>
> | Bentley says that it should be in the aux relay panel (by drivers left
> | knee under dash on left hand drive cars). It looks like a relay but is
> | double the width of a normal relay. Bottom row of relays.
> | >
> | > Anyone knows location of ISV Control Unit on 5-cyl. 1989 Audi 100?
>
> I looked there, only 4-5 wire connectors and 2-3 relays, none of them
> wider than normal. I will look again soon (to cold now).
>
> Or is it different on European models? Anyone from Europe?
>
>
>
>
> --
> ___ ____
> /__/ / \ ** Registrovani korisnik Linuksa #291606 **
> / / \/ /\ \ ** http://counter.li.org/ **
> /__/\____/--\__\ ** Reply at: iimperl - at - ml1 - dot - net **



  #36  
Old December 18th 04, 02:39 PM
Yvan
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Nedavno Steve Sears pise:

| You might want to look close to the relays you have found, in my 1987
| 5ktq there are a set of relays accessable by a cover, but there are
| also some relays mounted beside them.

I took some pictures:

http://photos.yahoo.com/perlica

Black box that I outlined with red color is Bosch car alarm. Nothing
looks like ISV Control Unit. Am I looking at right place? Look at first
two photos.


--
___ ____
/__/ / \ ** Registrovani korisnik Linuksa #291606 **
/ / \/ /\ \ ** http://counter.li.org/ **
/__/\____/--\__\ ** Reply at: iimperl - at - ml1 - dot - net **
  #37  
Old December 19th 04, 01:34 AM
Tony
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That is where you should find it.

Like I mentioned before, that is where it should be. I remember someone
commenting on the Audiworld form (T44 / V8) that some years controlled the ISV
from the ECU but I am not sure if that is correct and what years it would
involve. You may want to ask the question there as well.

Tony

Yvan wrote:

> Nedavno Steve Sears pise:
>
> | You might want to look close to the relays you have found, in my 1987
> | 5ktq there are a set of relays accessable by a cover, but there are
> | also some relays mounted beside them.
>
> I took some pictures:
>
> http://photos.yahoo.com/perlica
>
> Black box that I outlined with red color is Bosch car alarm. Nothing
> looks like ISV Control Unit. Am I looking at right place? Look at first
> two photos.
>
>

  #38  
Old December 19th 04, 11:36 AM
Yvan
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Nedavno Tony pise:

| That is where you should find it.
|
| Like I mentioned before, that is where it should be. I remember
| someone commenting on the Audiworld form (T44 / V8) that some years
| controlled the ISV from the ECU but I am not sure if that is correct
| and what years it would involve. You may want to ask the question
| there as well.

I will, thanks.

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  #39  
Old January 26th 05, 09:31 PM
Yvan
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Nedavno Steve Sears pise:

| You might want to look close to the relays you have found, in my 1987
| 5ktq there are a set of relays accessable by a cover, but there are
| also some relays mounted beside them.

I found ISV control unit. It is integrated with fuel injection control
unit, and is under right side kick panel, and ISV is connected to it. I
checked connection and it is OK.
Ignition control unit is under left side kick panel, and idle and full
throttle switches are connected to it (and the connection is OK, and
switches work as they should).

Since I did not knew how to fix my idle problem proper way I decided to
do the only way I knew. I cut the wire from fuel injection control unit
to ISV just in front of fuel injection control unit, and then used rear
fog light switch on the dash for connecting and disconnecting ISV.

Hire is how it now works: I switch ISV on, start the car, and drive for
a while until engine warms up to ~50 degrees Celsius. I then hit the
switch, and disconnect ISV, and engine revs nicely around 800 rpm. No
stalling - hesitating then. Not the best solution, but it works.

I was wondering if I could do some damage by disconnecting ISV while
engine is running?

Am I right to assume that there is no vacuum leak if engine does not
stall with ISV disconnected?

And since idle switch works, and its connection to ignition control unit
is OK, as is ISV - fuel injection control unit connection, perhaps ISV
is my problem. On the other hand I cleaned ISV with carburetor cleaner
(I should use throttle body cleaner as I learned later), and checked it
with 9V battery, it seemed OK to me. And I did put another ISV (but not
from NF engine, it was slightly different), and my problem did not go
away:-(

Anyway I temporarily solved my stalling/idle problem.

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/ / \/ /\ \ ** http://counter.li.org/ **
/__/\____/--\__\ ** Reply at: iimperl - at - ml1 - dot - net **
 




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