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GM 3 Bar MAP Sensor
GM 3 Bar MAP Sensor
GM 3 Bar MAP Sensor
GM 3 Bar MAP Sensor
GM 3 Bar Map Sensor Wiring Pinout

MAP Sensor – GM 3 Bar MAP Sensor

5 out of 5 based on 1 customer rating
(1 customer review)

$78.00

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Frequently purchased together

GM 3Bar MAP Sensor Uncrimped Connector

MAP - GM 3 Bar MAP Sensor 6" Pigtail

Description

GM 3 Bar MAP Sensor aka Manifold Absolute Pressure Sensor. This sensor is good for up to 29psi of turbo/supercharger boost and is fully compatible with the MS3Pro ECU and all flavors of the MegaSquirt EMSMicroSquirt EMS.

Replaces GM Part Numbers 12223861, 16040749 & 12223749 used commonly by GM, Buick, Cadillac, Chevrolet, GMC, and Pontiac from about 1982 until about 2003.  They are commonly used for replacement in these vehicles, but we also commonly use them with our aftermarket MegaSquirt/MS3Pro Engine Management Systems.

GM 3-bar Manifold Pressure Sensor Wiring Diagram / Pinout Information:

GM 3 Bar Map Sensor Wiring Pinout
GM 3 Bar Map Sensor Wiring Pinout

It’s pretty straightforward to use this with any of our aftermarket EMS options.  As per the wiring diagram above, you can:

  • Wire Pin A to Sensor Return/Ground at the ECU.
  • Wire Pin C to 5-volt vref from the ECU.
  • Wire Pin B, the Sensor Output, to the ECU’s MAP Sensor Input.

Calibration Information for Aftermarket EMS usage:

Calibration is linear with 1.1 kPa at 0 volts and 315.5 kPa at 5 volts.

This is available as a simple pre-configured choice from the drop-down box when configuring your MegaSquirt/MicroSquirt/MS3Pro ECU.

GM 3 Bar MAP Sensor Calibration with MegaSquirt or MS3Pro
GM 3 Bar MAP Sensor Calibration with MegaSquirt or MS3Pro

From the Tools> Calibrate MAP/Baro screen in TunerStudio, you simply choose ‘GM 3-Bar / MPXH6300’ from the ‘Common MAP Sensors box.  Then ‘Burn’ (or save) this to the MegaSquirt ECU.

 

 

 

The wiring harness connector is sold separately as we give you a choice of a ready-to-crimp connector , or a pre-crimped pigtail .  Our USA-assembled map sensor uses a universal keying that is compatible with pigtails for 1, 2, and 3 bar MAP sensors. Older sensors used a specific keying you had to match with the connector you’re using.  This sensor will work with any wiring connector keying variant.

Made in USA

This sensor is assembled in the USA, unlike the current Delphi production.  We try to use USA sourced parts in every case we can!

We’ve also tested the cheap foreign made knock offs and had customers come to us for a replacement after they tried to go cheap as well and had a failure.  Those generic knock-offs like to explode (literally come apart in pieces) on you and leave you stuck on the side of the road.  These USA Assembled parts have had zero such issues in our experience.

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1 review for MAP Sensor – GM 3 Bar MAP Sensor

Only logged in customers who have purchased this product may write a review.

What is in the box?

  • (1) 3-bar MAP sensor

How much boost will it read in PSI?

  • This sensor will read up to 29 psi of boost at sea level.

What is the calibration info I’ll need for this sensor?

  • Calibration is linear with 1.1 kPa at 0 volts and 315.5 kPa at 5 volts.
  • You can simply choose ‘GM 3-Bar’ sensor in TunerStudio to calibrate any of our ECU’s to this sensor.

Where is this product manufactured?

  • This product is made in the USA.

Does this sensor come with a plug or pigtail?

  • The plug is available separately as a connector or pre-crimped pigtail.

How does this product compare to a genuine GM / Delphi MAP sensor?

  • We used to sell genuine Delphi sensors until they moved production to China and began delivering an unacceptably high initial defect rate. The last batches we sold had 1% or 2% delivered with incorrect calibration.  These USA-assembled sensors deliver excellent accuracy and reliability.

Can I use this on a naturally aspirated motor?

  • Yes, it delivers enough resolution below 1 bar to run a naturally aspirated motor with no difficulty.

Questions & Answers

    How do I wire this to my MS3X ? I see the Ext Map signal wire what about the red wire on GM plug?
  1. 0 votes
    Q How do I wire this to my MS3X ? I see the Ext Map signal wire what about the red wire on GM plug?
    Asked by Gary Pheng
    A

    Connect it as follows.

    1. Pin A - Sensor ground on main board.
    2. Pin B - EXT MAP on MS3X.
    3. Pin C - VREF (pin 26) on main board.
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