[s-cars] possible ignition problem

[Adam Cramer]

I have an update on this......
 Last night I decided to clean most of the electrical contacts underneath 
the electrical cover (where the POS units are). 

After I cleaned everything (with electrical contact cleaner), the Check 
Engine Light came on. Great, I try to make the car better, and I actually 
make it worse. Oh well. I proceed to use the 'blink' method to figure out 
the CEL. Fault code 2342 comes up.

According to SJM, 2342 means: "Oxygen Sensor Sensor Wiring or Sensor 
defective Heat resistor in sensor defective, Signal wiring shorted to 
ground, Fuel tank empty, Ignition system component failure, air leak at mass 
air flow sensor, air leak in exhaust pipe before catalyst, poor engine 
ground wire. Symptom: Emissions not within specifications"

OK, the obvious answer is to replace the O2 sensor. Well, I already did that 
a few months ago. However, I'm still getting very poor gas mileage. Before I 
drop $100 on another one, I'd like to make sure that's the problem. Has 
anyone had any problem with the 02 sensor wire or connector? I examined the 
wire and the connections and everything looked normal. 

Oh, and I've had an idle problem every since I bought the car a year ago. 
The car seems to hunt for the proper RPM at idle after it's warm. I'm pretty 
sure that the 02 sensor or the wiring/connector is causing this. 

Any suggestions/recomendations?

Thanks in advance.
 Adam
95 S6 Avant
 On 7/22/05, Kent McLean <kentmclean at mindspring.com> wrote: 
> 
> Adam Cramer wrote:
> > The check engine light isn't on. Does this fault code test still work
> > if I don't have a CEL?
> 
> 
> The test will still work, you just won't be able to see the
> codes. :)
> 
> From <http://www.sjmautotechnik.com/trouble_shooting/ecuf20v.html#fcs4>
> 
> If the "Check" engine light does not come on with the ignition
> key turned to the on position, then you may have a burned out
> bulb in the instrument panel. Some vehicles may not have this
> bulb installed at the factory.
> 
> If this is the case, you "may" be able to install a 1.2 Watt
> instrument panel light bulb (Osram 2721) into the empty socket
> with wiring behind the instrument cluster
> 
> --
> Kent McLean
> '94 100 S Avant, "Moody"
> '89 200 TQ, "Bad Puppy" up in smoke
> 
>