For Mitsubishi 3000GT VR4 owners looking to accurately monitor boost pressure, especially on OBD2 models, upgrading the Manifold Absolute Pressure (MAP) sensor is a common and effective modification. The factory-equipped MAP sensor in OBD2 3000GT VR4s is a basic 1-bar sensor primarily designed to detect positive plenum pressure for emissions control systems like purge and EGR valves. However, for performance enthusiasts and those tuning their vehicles, this sensor becomes a limiting factor when aiming for higher boost levels and precise data acquisition.
A popular and almost plug-and-play upgrade is the MAP sensor from the Mitsubishi EVO X. This sensor is a 3.25 bar unit, capable of reading boost pressures up to 32 psi, making it significantly more capable than the stock 3000GT VR4 sensor. Its physical similarity to the stock sensor ensures a straightforward swap, appealing to DIY mechanics and those seeking a discreet yet powerful upgrade.
When you remove the original sensor, you’ll notice a cavity with a small opening. This design element is believed to minimize air turbulence around the sensor, contributing to more stable and accurate readings.
Comparing the stock 3000GT VR4 MAP sensor with the EVO X sensor highlights their visual similarities. The EVO X sensor, often identified by a yellow cap, is nearly identical in size and connector type, facilitating the easy swap.
Once installed, the EVO X MAP sensor maintains a factory-like appearance under the hood, a stealth upgrade for those who prefer an OEM look.
The part number for the EVO X MAP sensor is 1865A052. This sensor can typically be sourced from Mitsubishi parts suppliers.
For those implementing the EVO X MAP sensor, especially for OBD2 3000GT VR4s, ECU adjustments are crucial. To maintain proper emissions system functionality and prevent error codes, modifications to the ECU settings are necessary. Specifically, for those using Chromed ECU ROMs, adjusting the EGR Offset table is essential.
Update the EGR MAP Offset table values to the following for optimal performance with the EVO X MAP sensor:
750 84 1000 84 1250 73 1500 65 1750 60 2000 55 2500 48 3000 43 3500 23
Furthermore, to ensure accurate boost readings in datalogging software like EVOScan, sensor scaling adjustments are required within the ECU settings. These settings calibrate the ECU to correctly interpret the wider range of the EVO X MAP sensor.
Remember, these specific values are tailored for the EVO X MAP sensor (part number 1865A052). Compatibility and settings may vary with other aftermarket MAP sensors. Ensure you are using the correct calibration data for your chosen sensor to achieve accurate readings and maintain engine management system harmony in your 3000GT VR4 OBD2 setup.
