Guys

I have a 05 Cobalt SS/SC and I keep haveing a problem with my supercharger pressure sensor (located at the top of the supercharger). I have 2.7 60lb injectors, exhaust, Fujita intake and a Hp Tuners tune.....I get the (engine power reduced) when I get into boost. Is there any fix for this.....I replaced the sensor and it is still doing it. Can you fix the (eng power reduced mode) with HP tuners??? Thanx for the help

Colin

 

We have more than 1 pressure sensor. There is one upstream (one your talking about) and there is one downstream of the supercharger. Plus there is also a barometric pressure sensor.

Just make sure you're looking for the right one

 

Maybe this will help !

Results of Incorrect Operation

An open boost control solenoid control circuit, an open ignition 1 circuit, or boost control solenoid valve stuck open will cause reduced engine power, especially during wide open throttle operation.

The boost control solenoid control circuit shorted to ground, boost control solenoid valve stuck closed or a restriction in the boost source or signal hoses will cause full boost to be commanded at all times and a possible overboost condition during high engine load situations.

A restriction in the vacuum signal hose to the bypass valve actuator or a stuck closed bypass valve will cause a rough idle and reduced fuel economy.

Found somemore !

Supercharger boost pressure is regulated to prevent engine and drive train damage. When the engine is operating under high boost conditions, the powertrain control module (PCM) limits boost pressure to 83 kPa (12 psi). The PCM disables boost under the following conditions:

• When reverse gear is selected

• When the engine coolant temperature (ECT) is excessively high

• When drivetrain abuse is detected

• When the vehicle is decelerating

• If an intercooler pump failure is detected

• If the intake air temperature (IAT) sensor 2 becomes excessively high

• Under heavy load in first and second gear at engine speeds above 5,800 RPM