overheating 97tbird
Senior Member
Joined: Aug 2012
Posts: 170
From: USA
There is a lot of variance in factory gauges. A stock t-stat opens at about 195 degrees. Depending on the vehicle the gauge could read 1/3, 1/2, 3/4...at this temp..
The fan is commanded to come on by the PCM at a factory programmed temp. of 210 degree F (low), and 220 degrees F (high). Both the same for 4.6, and 3.8. The PCM knows the temp. from the ECT Engine Coolant Temp. sensor.
(Note: the only way to lower the temp. the fan comes on is by reprogramming the PCM (tune).)
I'm not sure, but I take it from the post you wrote that you mean the car is not actually overheating, but the gauge reads high.
A scan tool will tell you a more accurate reading of the coolant temp. Also, ECT values would be particularly important to read.
There is also a temp. gauge sending unit. Not to be confused with the ECT sensor.
For what it's worth I hope this information can be of some help.
The fan is commanded to come on by the PCM at a factory programmed temp. of 210 degree F (low), and 220 degrees F (high). Both the same for 4.6, and 3.8. The PCM knows the temp. from the ECT Engine Coolant Temp. sensor.
(Note: the only way to lower the temp. the fan comes on is by reprogramming the PCM (tune).)
I'm not sure, but I take it from the post you wrote that you mean the car is not actually overheating, but the gauge reads high.
A scan tool will tell you a more accurate reading of the coolant temp. Also, ECT values would be particularly important to read.
There is also a temp. gauge sending unit. Not to be confused with the ECT sensor.
For what it's worth I hope this information can be of some help.
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askedofgod
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Jul 18, 2015 11:53 AM
