Do i have to find a thermo-hygrometer sensor and a wind speed/anaemometer for the stx-7500 weathertech weather station, or can i use a general or generic brand for these sensors? I searched for a man

No problem, it is normal for a car to require periodic trips to the gas station. Many factors including driving habits, mechanical condition of the car, tire pressure and even weather can affect gas mileage.

side of transmission just before transfer case a round sensor with wires.

Locate the Idle Air Control (IAC) valve and verify that there is good hot coolant flowing to the valve. The valve has a built-in thermo element to open the valve further when the engine is cold.

2. If the coolant lines are good and hot, locate the 3-cavity connector on the IAC valve. The Yellow/Black (Y/B) wire is the ground for the closed windings of the valve. Back probe the Y/B wire and with the car running ground the wire, the idle should slow way down and possibly stall the engine. If it does not slow way down, look for a sticking IAC valve.REMOVE IAC VALVE, CLEAN WITH CARB. CLEANER, ACTUATE VALVE WITH A POWER PROBE TO OPEN AND CLOSE VALVE. REINSTAL.
1. At the idle speed control valve, use a volt meter to measure the voltage on the open and close winding. The open winding should be approximately 3 volts cranking and 5 volts when the key is released. The voltage should slowly climb towards 7.5 volts. The close winding will start out at 11 volts and slowly drop towards 8.5 volts.

2. Monitor the coolant sensor voltage using a volt meter. Do not use the scanner only.

3. Check that the power steering pressure switch is not on.

4. Check that the throttle position sensor signal voltage is .49 volts at closed throttle.

5. Use the scanner to check any other inputs to the computer.

I’m happy to assist further over the phone at https://www.6ya.com/expert/uttamjeet_2f3adc18600f8ede

Sound like you have a bad input or output speed sensor on the front of the tranny they have two wires going to each and are pretty easy to change please rate

The normal idle speed for almost every car is about 7500 to 8000. I'm not sure if you would or not, but if you have performance parts on it them i would stick a little over 8000 but around 7500 is the best idle speed to have.

your cable could be bad to your odom.

a coolant temp sensor will cause this problem if it is reading warmer than it is outside this will give lean condition .the sensor is located by the t-stat follow upper radiator hose down to housing.the sensor has two wires. thanks for your question.

try runing so fuel injector cleaner through it and see if that helps plus if u have not had a tune up try giving it one anbd put a new air filter in it