Map Sensor

[authority 1]

Recently I had to replace my wastegate because it was seized and so instead of gettign one from GM cause you need to buy a turbo assembly I called one my suppliers and ordered a turbonetics internal gate. After installing a boost guage I saw that is was hitting 15psi under full load and the check engine light came on scanned it and it was a map sensor code. My question is there a aftermarket mad senor to buy to avoid this issue.

[sschevelleman]

There are gadgets, but they're junk! Your MAP sensor is doing its job, the computer is just sensing over boost. Typical with boost controllers and what you describe. Stock boost is 7-9 psi and when the computer senses 15psi, its tripping a code. To solve, reprogram the computer with a chip if 94-95 or an ECM upgrade if a 96+. Raising boost as you have does nothing anyways. Raising boost ONLY allows more fuel to be burned. Unless you actually add more fuel, nothing happens...you are just adding air! Either bring your boost down to stock levels, or upgrade with a chip or ECM upgrade. Thats the real fix. Anything less is Jerry-Rigging.

[authority 1]

There are gadgets, but they're junk! Your MAP sensor is doing its job, the computer is just sensing over boost. Typical with boost controllers and what you describe. Stock boost is 7-9 psi and when the computer senses 15psi, its tripping a code. To solve, reprogram the computer with a chip if 94-95 or an ECM upgrade if a 96+. Raising boost as you have does nothing anyways. Raising boost ONLY allows more fuel to be burned. Unless you actually add more fuel, nothing happens...you are just adding air! Either bring your boost down to stock levels, or upgrade with a chip or ECM upgrade. Thats the real fix. Anything less is Jerry-Rigging.


Thanks for the help I'll be calling you in the spring, that would explain the 400km to a tank in fuel mileage.