Question about 2003 Lincoln Navigator

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My 2003 lincoln navigator check engine light is on and sputtering like its losing power.

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  • elliott4517 May 17, 2009

    i took my truck to autozone after the test was done it said truck was running lean do u think i should start with plugs and wires

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You need to get the computer scanned and the codes read. You could go to autozone to have the codes read. By your description I'd be willing to bet it has at least a p0300 code which is a random missfire. While it could be many things causing the missfire/sputtering the most likely culprit is spark plugs or the ignition coil as they are known to go bad commonly on those motors.

Unfortunately they aren't exactly a walk in the park to do. Navigators are one of the more difficult vehicles to replace spark plugs on as the cowl overhangs the motor quite a bit.

Posted on May 10, 2009

  • Christopher Foulkes May 19, 2009

    So the lean code was the only code in there? A p0171 or p0172? This is usually caused by a vacuum leak or a bad/dirty mass air flow sensor. Was it both banks or just one? Also check your air filter.

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What can be draining the battery on my 2003 lincoln navigator ...


Hi,
Firstly I would get checking the alternator. This should charge the battery as you drive but if it is broken the battery is technically on full power all of the time, even at night when you are sleeping.
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Thanks for choosing FixYa and welcome. Since your check engine light is on, you need to take it to Autozone or Advanced to have it scanned. They will do this for free and it will probably lead back to your problem. The light is on because the computer has detected a problem with your vehicle. In all honesty, there are a hundred or so things that turn on a check engine light. That is why it is important to get it scanned. This is your best bet that way you are not throwing your money and time away on parts that you don't need.

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HAVE VECHICLE CODE SCANNED AT AUTO ZONE THEY WILL DO IT FREE.TO SEE WHAT CAUSING CHECK ENGINE LIGHT TO COME ON.

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2003 lincoln navigator sputtering while driving


Hello, what you need to do first is get a scan of the engine. You can get a free scan at Autozone, Oreillys, Advance and perhaps your local places. Some faults will be recorded in the onboard computer, ask for Alternator test too. If you can get a Code number we can explain it for you.

Other defects, like Vacuum leaks and fuelpump pressure need different testing. This sounds like a EGR Solenoid going bad, but not bad enough to establish a check engine light. If you temporarily disconnect and plug the Vacuum hose to the EGR valve, you can drive it and see if the sputtering stops with the part eliminated. This may trigger a check engine light but the Code can be erased with a scanner or by disconnecting the NEG terminal of the Battery. The preferred method is to use a scanner(Autozone, etc.). I have the identical Year engine in my truck.

Vacuum leaks- use a spray water bottle and go aroung the gaskets on the Intake manifold while the engine is running. Also spray the Brake booster and if the RPM changes at either place you need to fix the leak or replace a part. Fuel pressure-This requires a gauge test on the fuel rail test port. Your fuel Regulator can be sticking, dirty fuel filter, fuelpump going out, the tests will tell. You can take it to an Independent or Dealer for these tests.

I hope you find my solutions helpful and please let me know what you discovered.

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Check air filter if it's dirty replace, replace fuel filter. these are the most neglected things on a car. If you need more help let me kow.
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have someone check the igniton system,which consist of plugs,coils,and injectors.that truck usually have bad coils that go out. make sure it didnt start after you have gotten gas. it may be bad gas if so.

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My engine light is on.


Hi,


The check engine light comes on mostly when you have bad gas tank cup,or you don't tight enough the gasoline.Go to any auto-zone and request the obd scanner,at no charge just leave your driver license or credit card,connect the scanner follow the instructions.They will check up and the check engine light will come off in the next 3 to 5 days.


Thank you !!

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1 Answer

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First change the fuel filter, could also be the pump.
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Coils are usually the problem on these engines. I'd replace all at once to prevent this problem from repeating.

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