MAP sensor voltage is inverted?
05-07-2016, 09:49 PM
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Car: '83 Camaro Berlinetta
Engine: 2.8L v6 (LC1)
Transmission: A3
MAP sensor voltage is inverted?
Check engine light came on, code refers to low map sensor voltage.
Checked map sensor, and found that the voltage to vacuum ratio is inverted?
It's supposed to be something like this:
1.) 0 in. Hg ...... 4.7 Volts.
2.) 5 in. Hg ...... 3.9 Volts.
3.) 10 in. Hg .... 3.0 Volts.
4.) 20 in. Hg .... 1.1 Volts.
However, it's this:
1.) 0 in. Hg ...... 0.6 Volts.
2.) 5 in. Hg ...... 1.5 Volts.
3.) 10 in. Hg .... 2.4 Volts.
4.) 20 in. Hg .... 4.4 Volts.
And if that weren't enough, the vacuum like to the map sensor has no vacuum, so there is a leak somewhere in it... Meaning that no matter what engine speed the map sensor is at 0.6 volts.
Any clues on this? Just a bad map sensor?
Checked map sensor, and found that the voltage to vacuum ratio is inverted?
It's supposed to be something like this:
1.) 0 in. Hg ...... 4.7 Volts.
2.) 5 in. Hg ...... 3.9 Volts.
3.) 10 in. Hg .... 3.0 Volts.
4.) 20 in. Hg .... 1.1 Volts.
However, it's this:
1.) 0 in. Hg ...... 0.6 Volts.
2.) 5 in. Hg ...... 1.5 Volts.
3.) 10 in. Hg .... 2.4 Volts.
4.) 20 in. Hg .... 4.4 Volts.
And if that weren't enough, the vacuum like to the map sensor has no vacuum, so there is a leak somewhere in it... Meaning that no matter what engine speed the map sensor is at 0.6 volts.
Any clues on this? Just a bad map sensor?
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