Gm 3 Bar Map Sensor Wiring Diagram

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. This sensor detect the intake manifold pressure change value and converts it into a signal voltage. The map sensor uses a three wire connector.

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You need to identify the signal reference and ground wires using your vehicle repair manual.

Gm 3 bar map sensor wiring diagram. I wired this map sensor up like any of the older brick style gm map sensor. Sloppy mechanics wiki gm map sensor identification how to install or replace a map sensor 3 bar for gm ls v8 for boost supercharger or turbocharger 3 bar map sensor. Installing a 3 bar map sensor to get ready for boost on my 2000 chev silverado 1500 ls turbo truck project with 411 ecu. 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.

Turn the ignition key to the on position but don t start the engine. This will allow the computer to supply a reference voltage to the map sensor. Once i wired it proper i was able to input the numbers from the above post and that got me within 3kpa. 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.

These 2 and 3 bar map sensors are a direct fit to the lt1 and ram jet 502 intake manifold but because the connector key configuration is not the same the 1 bar green. This map is wired differently and i was able to locate the correct wiring diagram. Checking for reference voltage. The map sensor or manifold air pressure sensor is a main input to the ecm or engine control module.

Adjusted the 0v to roughly 13 2 and that got the map to match my baro board. Next video will show the installation of the hp tuners 3 bar enhanced os. For supercharged or turbocharged engines a 2 bar map gm 12569241 supports up to about 14 7 psi boost and a 3 bar map gm 12223861 supports up to about 29 7 psi boost. 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.