Question about 2003 Ford Crown Victoria

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Dash bored light says check fuel cap and i replaced it with a new gas cap and the car is still stalling out

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  • Expert
  • 103 Answers

Evap system failure. Check the charcoal canister.

Posted on Feb 09, 2014

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6ya6ya
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Posted on Jan 02, 2017

PyroPCMan
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SOURCE: check fuel cap light

Good Day,

Probably just a bad seal in the cap. You can purchase a new one from any auto parts store or dealer. Just make sure they cross-refrence the new cap to your car as diffrent caps have diffrent pressure ratings, and you wanna make sure you get the right one. And yes a faulty cap can cause your check engine light to come on as the fuel is not pressurized properly for the motor. Once the cap is replaced with a new one remove your negative battery terminal for a few moments, then re-connect this will clear you check engine light. If you don't do this you engine light will stay on forever.

Good Luck
Hope this helps

Posted on Jun 30, 2008

emissionwiz
  • 75117 Answers

SOURCE: 85 Ford f150 4.9l 4wd truck combustion running bad

the problem is caused by a leaking intake manifold and the carb in many cases being loose at the base, grab the carburetor and wiggle it, check these two items and let me know

Posted on Oct 26, 2010

mgomez0824
  • 351 Answers

SOURCE: My "check fuel cap" light is on and i have already

you need to reset it by diconnecting the neg cable from you battery ..for a couple minutes to reset computer

Posted on Jan 23, 2011

  • 233 Answers

SOURCE: engine stalls after engine warms up. I put heat in

try testing/replacing the coil. if it stalles after the car warms up that gives the coild time to over heat and die.

Posted on Jan 31, 2011

dttech
  • 4803 Answers

SOURCE: gas cap light and check engine light on 2001 ford taurus ses

Sorry, but there is no "sensor at the fuel cap". Therefore, there is no code that says "sensor at the fuel cap". There is, however, a Diagnostic Test Code (DTC) That indicates a possible problem with the fuel cap.
(HINT: When you want information on codes, it is usually wise to include the code number that you are getting - that way, it can be looked up, instead of GUESSING at what the problem is from a code description that some generic code reader is telling you..)
DTC P0457 is defined by SAE J2012 as "Evaporative Emission System Leak Detected (fuel cap loose/off)"

At this point, I am ASSUMING this is the code you got.

This DTC is set when the Powertrain Control Module (PCM) detects that there is an in-tank pressure drop that is more than 7in. H2O within 30 seconds directly after refueling, or there is excessive purge (fuel Vapor) flow more than .06 lbs. per minute. Possible causes are:
> Fuel filler cap not installed after refueling
> Fuel filler cap loose or cross-threaded

There are other malfunctions that can also cause this code to set, but it will be accompanied by other codes indicating other possible failures.
If there are no other Evaporative Emissions System codes present, then there is most likely a problem with the way your fuel cap was put on the last time you got fuel.

Check your fuel cap and make sure it is on correctly and is tight.

Posted on Apr 19, 2012

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Old post. but this is common on ALL EFI CARS.
great question and is very easy.
btw one of the best posts on the forum best of 1300.
the gas cap must have the proper vacuum breaker (ask STANT for one) if missing the cooling fuel will pull and illegal vacuuum and the gas tank will implode (crush) I have a nice photo of same car doing that.
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to google landers. i make this. post.

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