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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. 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.

Description. MAP Sensor GM 3 bar (Manifold Absolute Pressure Sensor), standard, compatible with the MS3Pro and all flavors of the MegaSquirt EMS / MicroSquirt EMS.MAP Sensor assembled in the USA, unlike the current Delphi production. Calibration is linear with 1.1 kPa at 0 volts and 315.5 kPa at 5 volts.

GM 3 Bar Map Sensor Wiring HELP. Jump to Latest Follow 1 - 16 of 16 Posts. M. marcs23 · Registered. Joined Jan 15, 2003 · 686 Posts . Discussion Starter • #1 • Apr 16, 2006. I am about to ...

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. 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.

Compatible with standard keying of GM’s 3-Bar Map Sensor. This plug features 6″ of pigtail and is ready to be added to your wiring harness. Color coding when used with our 3 bar MAP sensor is as follows: Black – Sensor Ground; Green – Signal to ECU; Gray – 5 volt reference voltage from ECU

Common GM Linear Calibration: 20kpa (absolute)=0.300v, 300kpa (absolute)=4.900v Mechanical connection via 3/16″ hose connector nipple The linear calibration for this 3 Bar GM/Delphi MAP sensor is already pre-loaded on many aftermarket ECUs (including the range of Link G4+ and Vipec i-series ECUs).

I have a new Dominator EFI system. The MAP connector that it came with, would not work with my GM sensor 12592525 3 bar. I was able to get a new connector but trying to know if anyone has had this problem? I did rewire it but it was not in the same wire location I wired it per the GM directions which I will list below. Colors are the harness and numbers are location.

There are several varieties of pressure sensors from GM: Map sensors in 3 varieties (1 bar, 2 bar, 3 bar), and a barometric pressure sensor. 1 Bar sensors are good for NA engines, they measure from 0 (vacuum) to approximately atmospheric pressure. A 2 Bar sensor is good for 15 PSI of boost, and a 3 Bar unit is good for 30 psi of boost.

For my wideband, I got 5V from a random wire at the ECU. I had a slight voltage drop I had to account for there, however. Using a DataQ for the wideband. I plan on running the MAP sensor to the DataQ next time I am working around the area where I ran all the wires into the car. The EGR wiring is just so easy to tap into.

I wired this map sensor up like any of the older brick style gm map sensor. This map is wired differently, and I was able to locate the correct wiring diagram. Once I wired it proper, I was able to input the numbers from the above post and that got me within 3kpa. Adjusted the 0v to roughly -13.2 and that got the map to match my baro (board ...