F150 stalls when driver makes sharp left-hand turns


#1

A work vehicle of ours, a 1997 F-150 (about 169,000 miles) has recently acquired a tendency to stall if the driver makes a sharp left turn (e.g., when maneuvering in a parking lot). The truck then starts right back up. Automatic transmission. Any ideas???


#2

If the power steering system is malfunctioning, the extra load on an out-of-tune engine might be enough to make it stall at idle speed.


#3

If the vehicle has an inertia sensor (to shut the fuel pump off in the event of an accident) that may be malfunctioning.


#4

There’s a power steering pressure switch mounted to the high pressure line. When the wheel is turned under slow speed conditions this switch sends a signal to the computer. The computer then commands the idle air control motor to a position that allows the engine to idle with the power steering load on the engine. Otherwise the engine can stall.

I can’t tell you why it would only stall in left turns but not right turns, but it might be something worth checking out.

Tester


#5

Truck should have one, but a Manual reset, hard to restart condition would seam likely in that case.