Their are a fw.. but the main one I'd bet your thinking of is the Fuel tank vent valve. Inside the gas cap door back where the hinge tucks away there is a vent tube that allows air out when gas goes in, also for expansion/contraction from heat and cooling. Crawl under the car and feel up behind the wheel well for where the fill tube is. The larger one is for the gas, the smaller is the vent tube. If you follow that down, right near the rear suspension there is a cylindrical valve on the tube that looks liek what you'd see on a propane tank for a grill. That'sa the one! I think there's another on the evaporative collection tank too, but that's much harder to get and and repalace. start with the vent tube if you have an issue.
Check the fuel pressure on the Focus wagon as well as the EGR valve. If the fuel pressure is low or the valve is clogged then the car could have these problems.
The low side air conditioner pressure valve is located on the top of the accumulator of the Ford Focus 2005. This is located in the front of the passenger wheel near the bumper.
were is the Schrader vale located
Yes.
Schrader valve on fuel rail.
With a fuel pressure gauge attached to the fuel rail.
solenoid 2 valve ford focus
check to the car manual but normally for ford fucus is 32 psi.
It is a secondary air injection system bypass/check valve for a 2006 Ford Focus.
where is the pvc valve on a 2002 ford focus dual overhead cam ztec 2.0
Use a leak-down tester in the suspect cylinder to see if the valve is sealing.
where is the suction recharge value on a 200 ford focus