Focus Fanatics - View Single Post - Engine warmed up, then went cold.
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Old 02-02-2013, 10:41 PM   #4
suss6052
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Join Date: Feb 2012
Fan#: 95752
Location: ..., MI
What I Drive: 2013 Ford Focus ST2 Ingot Silver

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Quote:
Originally Posted by adamdv5 View Post
I've realized that, too. Which is why I wait until the engine says it's warm on the gauge. But mine went backwards...
The car says its warm on the gauge well before the engine is actually warmed up. Its more of a dummy gauge, so unless you were to have been checking in test mode the temperature sensor reading you wouldn't know that it reads 50% (aka nominal) as low as 41C or sooner which is still frozen in terms of engine temperatures. Normal operating temperature is actually closer to 80-97C when its fully warmed up.

It doesn't warm up all that fast when its cold, especially if you don't have the heater set to maximum for long enough to trigger the active shutter system to close and warm the engine up faster rather than sucking in cold air.
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