Cold Engine Control Pressure Test
WARNING: This page is about a different car, the 1984 Volvo 760, 1984 Volvo 245, 1984 Volvo 244, and 1984 Volvo 242. However, it is still accessible from the selected car via links, so may be relevant.
- Testing must be done on cold engine. Unplug connectors at auxiliary air valve and control pressure regulator. Place valve on pressure gauge in open position and operate fuel pump.
- Check pressure quickly. Reading should fall in shaded area of graph. Be sure to check air temperature and read correct area of graph. See Fig 1 .
- If control pressure is not correct, retest with new control pressure regulator. No servicing is possible.
NOTE:
Some models have a control pressure regulator with atmospheric pressure compensation. Pressures may vary slightly on these models.