Check engine and check gas cap light keep coming on after I changed the gas cap and reset the check engine light its on again
You need to diagnose any codes you get
& smoke test the evap system, to find a
problem
Seldom does throwing on parts with a name similar
to a code work
Codes have nothing to do with installing parts
Clearing codes, clears all data needed to diagnose
the failed system & the evap system only runs every few
days,so you done as far as codes helping
SOURCE: my 06 navigator bgan to sputter and loose power,
This is caused by a misfire, if you have the compuetr scanned there will be codes that will point you to the problem, there are many auto part stores that will scan it at no charge, this are famous for bad coils, you may have a bad coil or two, this truck has a coil for each cylinder, when they scan it it will say for example code # is po301 cylinder 1 misfire detected. then you would know that # 1 is the misfiring cylinder, and the most common problem would be the # 1 coil,hope this helps.
SOURCE: 2003 LINCOLN NAVIGATOR: ROUGH IDLING
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.
Randy
Testimonial: "THANKS FOR THE HELP, I REPLACED THE AIR FILTER. I AM NOW TESTING IT BEFORE I REPLACE THE FUEL FILTER. I WILL ADVISE LATER OF THE RESULT."
SOURCE: check engine soon light on
The light means pretty much what it says. This light is a warning to let you know that your Engine Management System is malfunctioning. The onboard computer will need to be scanned to find out which of the many systems monitored by your computer is malfunctioning.
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