98 Ford Expedition, 5.4 Automatic 4x4.
The car will barely run at idle. It usually dies. Driving is ok. At a stop I have to keep it at about 1000 RPM to keep it from stalling.
The code scanner says P0171 bank A is running lean, P0174 bank B is running lean.
I have replaced:
Fuel Pressure Regulator Valve
Two O2 sensers on the engine side of the catolitic converter
Idle Air Bypass Valve.
Any suggestion or comments would be appreciated.
Thursday, May 18th, 2006 AT 10:32 PM