MAP Sensor Upgrade: A Guide to Boosting Your Gen 2 Viper with Gen 3 / SRT 4 Sensors
These instructions are for installing a MAP sensor from a Gen 3 Viper (03 – 06) or SRT 4 MAP sensor on a 2nd Gen Viper for boosted applications. Whether soldering or using butt connections ensure all splices are tight. It is important to note that the PCM will have to be tuned for proper scaling for this sensor. Failure to do so may result in poor drivability and potential damage to the engine.
GEN 2 MAP Sensor
GEN 3/SRT4 MAP Sensor
Step 1: Locate the factory MAP sensor located on the back left side of the intake manifold and disconnect the sensor. For convenience it will be easier to wire the new pigtail for the new MAP sensor with the cowl removed.
Step 2: Remove any tape that is on the wiring conduit and pull the conduit back to reveal the factory MAP sensor wiring. To avoid getting wires mixed up, splice each wire in one at a time.
Step 3: To determine how much wiring on the new pigtail will have to be trimmed off, mount the new MAP sensor to the cowl bracket on the left side of the engine using a zip tie and make your measurements there. Plan to cut the factory wiring about ½ inch down from where the wire enters the back of the connector.
Step 4: The connector pinouts listed above are viewing the connector from the face of the connector. Take notice that the circuit locations are different from one another so it is important to make sure these do not get mixed up.
Step 5: Working from pin 3 on the factory gen 2 connector (left pin), cut the wire about ½ inch down. Splice pin 3 on the new pigtail (left pin) to the wire that was cut on the factory harness.
Step 6: Working from pin 2 on the factory gen 2 connector (middle pin), cut the wire about ½ inch down. Splice pin 1 on the new pigtail (right pin) to the wire that was cut on the factory harness.
Step 7: Working from Pin 1 on the factory gen 2 connector (right pin), cut the wire about ½ inch down. Splice pin 2 on the new pigtail (middle pin) to the wire that was cut on the factory harness.
Step 8: Ensure all connections are properly made by lightly tugging the wire where the connections were made. If the wires separate or feel loose in any way proper connection was not made and that section of wire will have to be redone.
Step 9: Once proper connections have been confirmed cover the exposed wires with either electrical tape or adequate wiring conduit. Connect the connector to the sensor. Remove the old sensor from the intake manifold and run a vacuum hose from the barb on the manifold to the barb on the MAP sensor.
Step 10: Install the cowl.
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