AR159 2.4 210HP P0237 overboos issue, yet boost gauge shows normal pressure
Hi. I have 2 quick questions (these might be very obvious / noob questions).
So last time on the highway the "check engine light" came on when I accelerated hard from the intersection. More specifically, I floored the car in 3rd gear and at the exact moment when I switched to 4th gear the engine light came on and car lost a lot of power (limb mode?).
I restarted the car and the power was back.
I took the car to a mechanic who hooked it up to a computer. The following error popped out: P0237.
We took the car for a spin and it really showed some crazy numbers. Past 3000 rpm the turbo was supposedly providing 3000mbar of pressure, although the signal from the engine was to decrease the pressure.
We changed the overboost valve, but the problem is still here. Now the mechanic will run some more tests on it and will check the turbo bypass and other stuff. I will leave the professional to do the magic.
But. I would have 2 obvious questions.
1) Since turbo is providing 3000mbar (or more, this is where the sensor is at max reading) why the car doesn't go faster? I mean (by my simple logic) - the more (pressurized) air the engine can get, the more output power it provides (the richer the explosion). Yet, the performance is as it was before this error started.
Am I right to assume -> more air, more power? So at 3000mbar the car should be flying.
2) if the computer is reading 3000mbar then why is the boost gauge on the dashboard only showing about 1400mbar at full throttle? Who is wrong here? And why the different readings? At 3000mbar this gauge should do the 2 spins around the clock and not stop at ~1400mbar (1600mbar is max reading)?
Again, these might be silly questions, but still.
Thank you in advance for your insights.
Last edited by tej147; 10-08-16 at 21:31.