C70 Jerking Acceleration

Whoa, sounds like a party of problems! That whistling and hissing, plus the stalling? Yeah, boost sensor is a prime suspect. But also check the wiring and the plug going into the sensor itself. I once had a similar issue on an old turbo Saab – turned out the plug was loose and corroded. Worth a quick peek before you throw parts at it.

Thanks for the advice. Could you explain how to properly inspect the cable and plug connection? I want to make sure I'm doing it correctly before replacing the sensor.

No problem! Honestly, it's pretty straightforward. Just give the wires a gentle wiggle and see if anything feels loose or looks damaged. Look for any green gunk on the contacts inside the plug – that's corrosion. If you're not comfortable or don't see anything obvious, I'd suggest heading to a trusted shop. Better safe than sorry with boost issues!

I appreciate the guidance. I checked the connection, and it seemed intact, so I took it to the workshop. Turns out it was indeed the boost pressure sensor, and the cable plug was defective, as you suspected. The repair cost 95€ Thanks again for your help!