Line Pressure

Connect a pressure gauge to line pressure test port. See Figure . Start engine. Apply service and parking brakes. Check pressure in all gears. See LINE PRESSURE SPECIFICATIONS table.

If line pressure is not within specification, perform QUICK TEST in FORD 4F20E ELECTRONIC CONTROLS article. If no electronic malfunctions are present, perform air pressure checks and service valve body.

LINE PRESSURE SPECIFICATIONS

Selector Lever Position	Idle RPM - psi (kPa)	WOT Stall RPM - psi (kPa)
"R"	112 (775)	279 (1922)
"D"	73 (500)	179 (1236)
"2"	73 (500)	179 (1236)
"L"	73 (500)	179 (1236)