Recommended Procedure

WARNING: This page is about a different car, the 2008 Ford Pickup, 2008 Ford F550 Super Duty, 2008 Ford F450 Super Duty, and 2008 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: If the test fails low, inspect the turbocharger blades for damage. refer to PINPOINT TEST KA to check the turbocharger operation.

Boost pressure levels out after 3,300 RPM. This is best accomplished either climbing a hill or with the vehicle fully loaded.

Connect the scan tool.
Key ON, engine running.
Access and monitor the MGP and RPM PIDS.
After the engine is up to operating temperature, find an open section of road and select the best gear to achieve a 3,300 RPM acceleration.
With the accelerator at WOT, record the highest boost pressure reading while accelerating through the 2,500-3,300 RPM range.