running rich- still -

[Brandon Rogers]

So I replaced the thermo switch/temp sender in the back of the head - no
change.
 
Anybody ever had a Throttle Pos Sensor go bad and not throw a code?
 
And I _think_ I'm only rich at idle and maybe on decel - does that shed
any light on the potential issue?  Thats why I'm thining TPS now - maybe
its not telling the ECU to go into Decel and Idle mixture.....???????
 
As a "reminder" - I have replaced within the last year or two-
FPR w/ new rubber vac line ~2 yrs ago
02 sensor 
Thermo time/temp sender 11/07
had injectors serviced by RC Engineering 9/07
No leaks - pressure tested 11/07
checked vac line to FPR 11/07
Cap/rotor/plugs 4 yrs/20k miles old
IAT wiring renewed 11/07
 
Should I check my fuel pressure?
 
Any input appreciated -
 
TIA-
 
Brandon
'84 urquattro 20V
 

-----Original Message-----
From: Brandon Rogers [mailto:brogers at terrix.com] 
Sent: Monday, November 19, 2007 1:51 PM
To: '200 20v List'
Subject: running rich- temp sender


Guys-
so as I still try to figure why I always get a very rich exhaust smell
wafting into the cabin when I come to stop - I tested the temp sender
(white two pin back of head)- Bentley says resistance should be
1500-3000 Ohms when cold (68F).  Miine was 3500.  Anybody had a temp
sender go bad - what happened?  Anybody feel like getting crazy and
checking to see what value you get on yours? - check resistance across
the 2 pics when cold.
 
any thoughts appreciated
 
Brandon