3 CEL Codes. :(

[Rzrseg]

Long story short. '95 Villager, 145,000miles.

Intermittant flashing when CEL when cold became steady CEL all the time. Starts fine but will not stay running (I have to keep futzing with the gas pedal) until it warms up. Once it warms up, it runs like a champ. I got the codes from the CEL (jumping the diagnostic plug in the engine) and it gave me the Engine Coolant Temp Sensor, the O2 Sensor AND the Knock Sensor. Ouch. I'm pretty sure I'm going to let the knock sensor stay bad but is there a way to test to see if the O2 sensor is actually bad (or is the diagnostic CEL a sure thing)...and what about that ECT sensor?

As a side note, the van just passed (after the CEL started flashing) a full blown emissions inspection, to quote the guy, "better than most new cars do".

The fact that all these things happened at once leads me to believe there is another problem.

Thanks.

*EDIT* I may have found the problem. I went out and did a quick check of the ECT valve (since it was easy...and it's cold and dark outside and when I started the car for the 'Warm Engine' check I hears a hell of a whistling noise. I tracked it down to a loose plastic air duct. By this time it was running warm so it would have stayed on anyway but it ran MUCH better when I plugged it back in and tightned it up. I let it cool for about 30 minutes and went back and started it up and it ran great (it would normally be dying again). The real test will be tomorrow.

[IH8SPM]

WOW! I am sure glad I was able to help.