Gm 2 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 2 bar map sensor voltage chart.

So by supplying a higher or lower voltage the return signal is varied by the same amount. 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. Linear output based in this info chart shown is for a 2 bar scaling to 29 4 psi. Apparently it s a gm cheverolet performance 3 bar sensor which should have an approx.

This sensor will respond to changes in manifold pressures and relay the information to the ecu in the form of a voltage signal ranging from about 1 volt to 5 volts. Stainless pressure sensor caliper use a ss pressure sensor where you need exact details of the pressure. Applications up to 30 lbs. 886 012 539 609 701 3 bar.

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. Nearly everyone is using the gm map sensors they are linear in output and readily available. Gm map sensor identification how to identify a gm map sensor. Several different versions are available for normally aspirated and engines with blowers.

The part is ac delco 12592525. Brass pressure sensor used for a boost gauge reference information for knowing manifold pressure not for ecu calibration. 3 digit numbers for identification. Chevrolet performance map sensors are high quality direct fit replacements for worn or malfunctioning map manifold absolute pressure sensors.

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. 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. Find chevrolet performance map sensors 12592525 and get free shipping on orders over 99 at summit racing. 039 460 883 876 2 bar.

The pressure inside the intake manifold is an extremely important input to the ecu. All the diablo tunes i am aware of right now are using a 2 bar map sensor in place of the factory 1 bar sensor. Map sensor information for the ecu calibration crucial information for the ecu.