re. 1988 80 Quattro engine trouble codes

[Swann, Benjamin R. (BSWANN)]

You might want to start with checking this: 2123 full throttle switch since
its failure might cause this: 2142 knock sensor(knock detected?)  Mine
actually had the positive wire at the connector to the throttle body switch
fatiqued/broke causing both IDLE and WOT switch failure conditions(even when
a new swich was installed).

Ben Swann
'87 5KCSTQW
__________________________

From: blarson at zeiss.com
To: quattro at audifans.com
Date: Tue, 10 Oct 2000 12:41:09 -0500
Subject: 1988 80 Quattro engine trouble codes

I am having some driveability problems with my newest acquisition  It is a
1988
80 Quattro 5 cylinder, 182,000 miles.

The car runs well until about 5 minutes of driving, at which point the check
engine light comes on and the car becomes really sluggish

when I flash the trouble codes it flashes
2142 knock sensor
1111 control unit
2123 full throttle switch
1111 control unit

The things I have done to the car so far are.
tune up
fresh premium fuel
injector cleaner (techron)
knock sensor is tight on block
Full throttle switch has continuity when closed
all fuses for computers and injection are good

Please reply directly if you have any ideas on what the cause of this
problem
might be.
Thanks in advance,
Brian
blarson at zeiss.com
1988 80q 182,000 miles
1987 5kcstq 184,000 miles