[V8] A small quiz for the V8 inclined

[KeithT1967 at aol.com]

Replacing isnt exactly hard, more like tedious and frustrating. You have to 
 remove the kneepad and the heater duct, pull the carpet, dig around to 
find the  plug, unhook the cable from the pedal, then try and figure out how to 
force  the cable housing out of the firewall..... and that last is always 
the hardest  part for me. 
 
 On the engine compartment side its very easy, made easier if you  remove 
the drivers side coil.
 
KT
 
 
In a message dated 6/27/2011 10:51:09 P.M. Eastern Daylight Time,  
ekellock at gmail.com writes:

Excellent.  Thanks for the feedback.  I do recall messing  with the full
throttle switch at the firewall.  I've avoided replacing  that in the 1990 
V8
with the judicious use of some yellow construction  string and wire.  I 
tried
that same trick on the 93 and no go, but it  was a bit half-hearted attempt.


Is that part tough to replace,  expensive?

Ed



-----Original Message-----
From:  v8-bounces at audifans.com [mailto:v8-bounces at audifans.com] On Behalf  
Of
KeithT1967 at aol.com
Sent: Sunday, June 26, 2011 8:18 PM
To:  v8 at audifans.com
Subject: Re: [V8] A small quiz for the V8  inclined


There are no common links between the cruise and  downshift  functions.

There are two things that make a V8  downshift. #1 is based on  throttle 
demand vs speed and current  selected gear which is sent as a signal to  
the 
tranny ECU from the  Engine ECU. #2 is the full throttle switch on the  
throttle cable.  This is why a V8 will make the aggressive two step 
downshift

regardless  of what mode the tranny is in if you stomp the throttle. Based 
on

your  description I'd guess your full throttle switch housing is broken
which  
requires replacement of the entire throttle cable assembly.

On the  cruise side, the most common problem I've seen is simply a  
selector  assembly that's either worn out or dirty. Second most common is  
an

unplugged hose at the vacuum actuator under the left dizzy. Third  would be 
a

broken plastic washer that attaches the actuator rod to the  actuator.  



In a message dated 6/26/2011 1:44:37 P.M.  Eastern Daylight Time,  
ed.kellock at gmail.com  writes:

What  sensor input would you think might be used for both  cruise control
function  and transmission downshifts?

When I  have the 93 V8 in Sport mode the  transmission upshifts as  
expected,
but it won't make the more aggressive  downshifts that I  have experienced 
in
the 94 V8, like down to 2nd at 55-60  or down to  1st at 30 or so.  The one
time it did downshift  aggressively in  Sport mode, I was also able to get 
the
cruise control to  work,  hence the search for some common link to help 
direct
my   troubleshooting.

Thanks for any and all   ideas!

Ed


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