Why is my Turbo valve on my Volvo not working?
If you are experiencing sporadic boost, consistently low boost pressure but reliable vacuum, or occasional spikes in boost pressure, the likely culprit is the Volvo Turbo Control Valve (TCV). Please note that the Turbo Control Valve may not be the problematic component. However, TCV failure is common for vehicles over 10 years old or 100k miles.
How do Volvo turbo control valves ( TCV ) work?
Its a pulse modulated solenoid. So it opens and closes like a fuel injector to get the right boost characteristics throughout the entire rpm range. No air is lost in these systems.
Why does my Volvo XC90 keep losing power?
Taken to Volvo every time to SRS airbag reset because it comes on every time I unplug battery $50 charge each time. Ridiculous! Checked voltage and never drops below 12.5 and only that low while starting. This is going to kill someone and Volvo does nothing about it.
Are there any complaints about the 2004 Volvo XC90?
CarComplaints.com Notes: The XC90 took its “freshman 15” of transmission complaints and turned it into a “sophomore 45.” The 2004 XC90 saw 3X as many complaints about the transmission failing as it did in its inaugural North American model year!
How do you replace a TCV in a Volvo?
Disconnect the electric push-release clip. If you are simply replacing the TCV, use pliers to disconnect the quick releases for the vacuum hoses, highlighted purple in the Volvo image below. Remove the hoses from the old TCV, and reconnect them onto the new TCV.
Why is my Volvo turbo covered in oil?
Leaky bypass valves, oil-sweating silicone couplers, and loose connections generally mean your turbo will be covered in oil by 200,000 miles if it hasn’t been maintained by a Volvo-wizard. This is my old 180,000 mile turbo, and while it performed fine, the bypass valve became dried and cracked over time, seeping oil everywhere.
Why does my Volvo have low boost pressure?
They can also be difficult to track down, especially on a Volvo where there are many sensors, hoses, and electrical components. If you are experiencing sporadic boost, consistently low boost pressure but reliable vacuum, or occasional spikes in boost pressure, the likely culprit is the Volvo Turbo Control Valve (TCV).