2003 Lincoln Navigator

MICHPRIC

MEMBER
2003 LINCOLN NAVIGATOR

2003 Lincoln Navigator V8 Four Wheel Drive Automatic

Replaced the whole drivers side catalytic converter with a direct bolt on setup, replaced all 4 O2 sensors, replaced 2 vacuums checked others for leaks and cracks but don't see any issues. The truck will stall after a few seconds of running unless I give it gas then it will say running.A friend of mine thinks it may be the fuel pump? Not sure what else could be causing it to stall. Injectors seem to be pushing enough fuel. Unable to do a pressure test since it won't stay running. Any ideas on where to look?

1 Reply

JACOBANDNICKOLAS

MECHANIC
109,867 POSTS

You can check the pressure without the engine running to see if it is producing. Here is the how to for checking it:

https://www.2carpros.com/how_to/how_to_check_fuel_pressure.htm

IF the pressure seems good, you may want to check the crankshaft position sensor.

Let me know what you find.