Here's the question, will a faulty coolant temp switch cause the ECM to 1) Increase fuel richness, particularly on cold start. 2) Cause the oil injection rate to increase. 3) Increase the load on the CAT (and eventual failure). 4) Cause rich-running, and white smoke on hard accel. and cold decel. And white smoke on cold start.

Thanks

 

I do know that there are maps in the ECU where relationships between coolant temps and other maps are made. I would have to take a look when i get home. I am sure there are others that have the answer handy though, so -bump-

 

Agreed, totally missed the white smoke comment. That is a good indication of coolant in the mixture

 

You would otherwise be correct but I have yet to see the coolant level drop, and its been doing this for months. The smell of the white exhaust is extremely raw.. unburnt fuel. The ignition is all new BHR + Bosch. I had replaced it previously in an attempt to address what I thought were failing ignition symptoms.

(Also, this is a de-cat car)

 

I'm going to look into this ECT. I wonder if I damaged it when I took things apart do a VAV cleanup. Its in the same neighborhood.

 

It would appear to be unburnt fuel vapor at idle. On acceleration it can turn darker. Bosch plugs, whichever came from BHR. they're good ones.

 

They provided you with NGK Iridium

 

Yeah I totally can't say for sure so let's go with that. I just remember being impressed, lets put it that way.