[V8] Codes pulled

[Scott Simmons]

Finally got my head screwed on straight, got the following codes:

2322 - Intake Air Temp Sensor
2342 - Oxygen Sensor

Car was made 8/89.  SJM says 2342 is listed for the ABH engine only, but 
by golly, I have it.

I recently cleaned up the ISV, which is right next to IAT sensor, so 
I'll go back and make sure I plugged that silly thing back in.  I also 
printed out the steps for checking the sensor.

What about the oxygen sensor code? 

2342 Oxygen Sensor Signal (voltage) is not changing up and down, (Shown 
for ABH Engine Only)
Signal shorted to ground or to +12V,
Fuse #5 blown, O2 Sensor heating element not working,
Ground problem between ECU pin 10 and engine block,
fuel pressure too low or too high, intake or exhaust system leak, 
defective ignition system component,
intake air leak after air mass sensor, O2 sensor is faulty

That's a lot of things to go checking after.  I'll probably pull the O2 
sensor connector and hook up a DMM to it to see if it's actually 
fluctuating in voltage or not.  Beyond that, I have no idea where to 
start!  I was fixing to replace the FPR sometime this month as a 
precautionary measure.  I do have a slight exhaust leak as I can hear 
ticking from the right bank header on occasion.  Any other ideas?

Thanks,
Scott Simmons