I have MSII v3.57 runing on TunerStudios. I recalibrate the coolant temp sensor and turn on the car and when its hot i recalibrate it again and it shows me a very diffent temp than it did before. Is there something wrong with the sensor or am i not recomended to recalibrate it when the car is hot?
Thanks, Dave
GM Coolant temp Sensor Recalibration
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Read the manual to see if your question is answered there before posting. Many users will not reply if the answer is already available in the manual.
If your question is about troubleshooting, configuration, or tuning, you MUST include your processor type (MS-I or MS-II) and code version in your post. If your question is about PCB assembly or modifications, you must also include the main board version number (1.01, 2.2 or 3.0).
If you have questions about MS1/Extra or MS2/Extra code configuration or tuning, please post them at www.msextra.com Such questions posted here will be moved to: a temporary MSextra sub-forum, where they will be removed after 7 days
The full forum rules are here: Forum Rules, be sure to read them all regularly.
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yellowlt1ta
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Matt Cramer
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Re: GM Coolant temp Sensor Recalibration
What data did you use for the sensor?
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yellowlt1ta
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Re: GM Coolant temp Sensor Recalibration
I used the pre set data from tunerstudios. I make sure it says coolant temp sensor then i set the presets on the one that says GM and i set it to fahrenheit.Matt Cramer wrote:What data did you use for the sensor?
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Matt Cramer
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Re: GM Coolant temp Sensor Recalibration
Test it with the sensor in a cup of boiling water and see if you get a correct reading.
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yellowlt1ta
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Re: GM Coolant temp Sensor Recalibration
I will do so and get back to you with the results.
Re: GM Coolant temp Sensor Recalibration
GM uses a funky dual bias resistance strategy in the ECU on the coolant temp sensor. If you are piggybacking the stock ECU and vampiring the signal the odd shift in scale is what you will see.
You must either supply the megasquirt with it's own coolant temp sensor or cut loose the factory one from the stock ECU and give the stock ECU a resistor to play with to read normal temps.
You must either supply the megasquirt with it's own coolant temp sensor or cut loose the factory one from the stock ECU and give the stock ECU a resistor to play with to read normal temps.