How do you replace fuel pump in lincoln navigator 2001

SOURCE: Air suspension pump on 2003 lincoln navigator

the little orange or red ring around the air hose whare it goes in compressor, must be pushed in while pulling out on air line. a small flathead screwdriver works fine

SOURCE: po320 code and code po303 2004 lincoln navigator

Replace the O2 Sensor and look at replacing the wires and Plugs. The engine seems to idle fine but hesitates and sputters under a load. Those are all Ignition system symptoms. The O2 Sensor would not normally be my first area of concern in a vehicle but you are right on the line as far as needing a replacement. Replace the Spark plugs and wires even if you aren't at that point in mileage and consider replacing the O2 sensor. It may very well be a crankcase sensor or Crank Position sensor but those should be under warranty unless the vehicle has 150000 miles on it. They rarely go out this early in the life span of the vehicle unless it has been abused.

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Marvin

• 85242 Answers
• Posted on Jan 27, 2010

SOURCE: need to find fuel pump relay on 2003 lincoln

in the passenger compartment fuse box the relay is
R303 Fuel pump relay

SOURCE: Why is my 2004 Lincoln Navigator missing or choking out with

It could be the filter agian; it could be the fuel pump, or it could simply be either a vacuum leak, EGR valve, fuel pump relay, O2 (oxygen) sensor(s), plugged injector (carburated, fuel injected); fuel pressure regulator, hole in a fuel line (look for fuel leaks under engine, and along side the driver side of car (under car).
I suggest having a fuel pressure test performed, and having the vacuum system tested, which should include EGR valve. Another possibilty, simply; could be the air filter. If it is ripped, torn, full of dirt and debris (from driving), it is possible it is clogged and is preventing sufficient air flow to the intake which will cause the car to hesitate, stall, idle roughly, or even die when accelerator pressure is released, or braking is applied. My 93 Subaru had this vary issue when I purchased it, and when upon checking the air filter, it looked as though rats or mice had begun digging (chewing) at the air filter. It was so torn that the filter was starting to get sucked up toward the intake which was plugging the air vent (hose), causing a lack of proper air intake (this mixes with the the fuel). Improper air/fuel mixture will cause a car to not even start, or stay running for a few seconds.
You can determine the fuel pump by having someone kneel down by the back of the car while you turn the ignition to the "on" position - DO NOT START the car -- when the ignition is turned to the "on" position, the fuel pump is actuated to draw fuel to the engine (this is a "primer" method"). If the person can hear the pump engage, then the pump is good. To ensure fuel pressure, after the car has sat for about an hour or so, locate the fuel rail (chrome, silver usually, sometimes black) and find the black screw port (usually black) and remove it. Carefully (cover with hand or rag etc) and depress the needle inside the port; if fuel sprays out (won't be too too much) then you have fuel pressure. If no fuel comes out, then move on to having the fuel pressure regulator and fuel pump relay replaced. Even if these are good, (no way to tell) - these being replaced will eliminate them as possible culprits.


The O2 sensors can be detected as a possible issue by having a diagnostics test performed (free usually at participating auto parts dealers; Napa, Baxter's, etc) *States, auto parts dealers vary.
Please let me know if you need further assistance.
carsandcomps,
Guru, Premium Expert @ Fixya.com