1990 TC MAF sensor Location
enigma58
10-01-2005, 09:31 PM
I am looking for that MAF Sensor that should be located at air filter or there about..but it's not there...I have notice that the 1989 do not have it is it possible that this 1990 TC fell to the crack..??? any help on this mystery would be helpfull..thanks
ltdltc
10-02-2005, 02:59 AM
Unless your car came with California Emission equipment your car doesn't have a MAF.
It relies on Speed Density which calculates the air needed for the engine. It is less effective then MAF.
Speed Density
Speed Density systems accept input from sensors that measure engine speed (in rpm) and load (manifold vacuum in kPa), then the computer calculates airflow requirements by referring to a much larger (in comparison to an N Alpha system) preprogrammed lookup table, a map of thousands of values that equates to the engine’s volumetric efficiency (VE) under varying conditions of throttle position and engine speed. Engine rpm is provided via a tach signal, while vacuum is transmitted via an intake manifold-mounted Manifold Air Pressure (MAP) sensor. Since air density changes with air temperature, an intake manifold-mounted sensor is also used.
It relies on Speed Density which calculates the air needed for the engine. It is less effective then MAF.
Speed Density
Speed Density systems accept input from sensors that measure engine speed (in rpm) and load (manifold vacuum in kPa), then the computer calculates airflow requirements by referring to a much larger (in comparison to an N Alpha system) preprogrammed lookup table, a map of thousands of values that equates to the engine’s volumetric efficiency (VE) under varying conditions of throttle position and engine speed. Engine rpm is provided via a tach signal, while vacuum is transmitted via an intake manifold-mounted Manifold Air Pressure (MAP) sensor. Since air density changes with air temperature, an intake manifold-mounted sensor is also used.
Hizhonor
10-06-2005, 03:26 PM
You have the 5.0 motor. The 4.6L was used starting in the 1991 Model Year. It has a MAF sensor. You need to look for the MAP sensor .
I am looking for that MAF Sensor that should be located at air filter or there about..but it's not there...I have notice that the 1989 do not have it is it possible that this 1990 TC fell to the crack..??? any help on this mystery would be helpfull..thanks
I am looking for that MAF Sensor that should be located at air filter or there about..but it's not there...I have notice that the 1989 do not have it is it possible that this 1990 TC fell to the crack..??? any help on this mystery would be helpfull..thanks
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