Gm 3 Bar Map Sensor Voltage Chart

The map sensor manifold absolute pressure has a 5 volt input and then reduces this voltage according to throttle opening altitude etc and sends the signal to the ecu.

Gm 3 bar map sensor voltage chart.

Still not 3 bar but a little better. The op stated the map voltage was high at idle and went down as vacuum decreased. 3 digit numbers for identification. Linear output based in this info chart shown is for a 2 bar scaling to 29 4 psi.

886 012 539 609 701 3 bar. Formula for the gm 3 bar map sensor is v 8 94 14 53 i have no idea why it s 14 53 and not 14 696 rounds up to 14 7 but it works out on gm s chart every time. Why doesn t it give me the full 3 bar of resolution. I have the gm 12592525 map sensor and have it selected as my map sensor.

749 861 the logic module uses the manifold absolute pressure map sensor to determine the absolute pressure not the relative to atmospheric pressure of the air inside the intake manifold and the atmosphere barometric pressure. Formula for the gm 3 bar map sensor is v 8 94 14 53 i have no idea why it s 14 53 and not 14 696 rounds up to 14 7 but it works out on gm s chart every time. On my fuel table it only goes up to 26 8 psi. If i choose the holley it goes to 31 2 psi.

So by supplying a higher or lower voltage the return signal is varied by the same amount. It is possible that detroit is. It is possible that detroit is slightly above sea level and you can use 12 11 in the formula for 1 mile above sea level. Now at a slightly higher elevation reading flickers between 1 78 and 1 79v giving a reading of 0 9 psig engine load with the car off.

Apparently it s a gm cheverolet performance 3 bar sensor which should have an approx. 039 460 883 876 2 bar. Gm map sensor identification how to identify a gm map sensor. This is the opposite of what should really happen.

I m betting either a bad map sensor or the wrong part altogether. But all of these sensors must still operate within the same voltage output specs as a 1 bar. This means the output voltage of a 2 bar map sensor with the key. So in order to accomplish this the output voltage must be scaled accordingly.