Quote:
Originally Posted by jfitzpat
No, not heated until condensation is cleared. And not CL until all the indications are for in range combustion and the O2 sensors are at temp.
So, if the system reports "closed loop", the ECU has made the decision for normal, not cold engine, operation. -jjf
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I'm learning quite a bit from your posts, but I checked my car tonight. Air and coolant temp. at 32F at startup. Engine was in CL in about a minute and stayed there. Coolant had only come up to 59F. I backed out of the driveway and drove maybe 100 feet. That is long before the engine is warm enough for fuel economy to start coming down and no way was the Cat. hot or condinsation out of the exhaust. What you have said in your post all makes sense, but I still don't see what the advantage is in using the CL guage.