ECT sensor
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Senior User
Joined: Apr 2004
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ECT sensor
Ok, I just read a thread in the aerostar forum about an engine stalling out and running really rough due to a bad engine coolant temperature sensor. I've seen this before in other cars as well, my question to anyone is can someone explain why and how a coolant temp sensor effects how the engine runs?
FTE Chapter Leader
Joined: May 2002
Posts: 42,571
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From: Fraziers Bottom, WV
In the EFI vehicles the Coolant sensor is your "Choke". The computer uses the temp. to gauge how to mix air/fuel and control the idle. It uses the O2 sensor to keep these in proper ballance based on the temp.
Freshman User
Joined: May 2004
Posts: 41
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From: Fort Collins, Colorado
This is why some guys will put a lower temp t-stat in there vehcal. Ect sees this as a colder condition, thus increasing the fuel pulse width(injector on time), More fuel more power....Not a lot though.
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