Mercury Sable LS 2000 - every time I put gas in the car it ...

Thanks for the question.

So you have the car idling in park when you are putting gas in or do you shut the car off?

Thanks

Fordanswerman

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FORD MOTOR COMPANY CAR AND POWERSTROKE SPECIALIST FOR OVER 16 YEARS. ASE MASTER SINCE 1991. CURRENTLY WORK AT A MAJOR FORD DEALERSHIP. GIVE ME YOUR FORD PRODUCT QUESTIONS, IF I HELPED, PLEASE HIT THE ACCEPT BUTTON. EXPERTS QUESTIONS ON FORDS WELCOMED

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Mercury Sable doesn't want start and keep running, idle after I put gas in it. Of course the car is off when I put gas in it. We put a nes filler pipe in and a new gas cap. There are no lights on on the dash that shouldn't be.

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It sounds like possible evap management valve stuck open sucking raw fuel in throught the evap sysytem. Does the car smell like it is burning a lot of fuel or black smoke out the exhaust. Is there anyway you can try to pull codes from computer? Autozone and other places usually can dothis for free.

Thanks

Fordanswerman

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FORD MOTOR COMPANY CAR AND POWERSTROKE SPECIALIST FOR OVER 16 YEARS. ASE MASTER SINCE 1991. CURRENTLY WORK AT A MAJOR FORD DEALERSHIP. GIVE ME YOUR FORD PRODUCT QUESTIONS, IF I HELPED, PLEASE HIT THE ACCEPT BUTTON. EXPERTS QUESTIONS ON FORDS WELCOMED

its very likely you have a fuel tank venting problem. new cars do not have vented caps, and the fuel filter was a good idea. you need to find the tank vent line which runs from the tank to the charcoal can under the hood. the caan will be around the size of a typical coffee can, probably close to the passenger side fender but in the engine bay, and will have at least two rubber hoses plugged into it. one will be coming off the engine and the other will be the vent line. remove it from the can just before putting ga sin the tank... while the tank is being filled have someone put a finger lightly covering the open hose end. as the fuel goes in the person should feel slight pressure, or at least smell ga sa bit.
after filling the tank putting the cap on you can try running the car with the hose end still open and something capping off the charcoal can where the hose was. if the car runs fine with the hose off but won't idle agian when re attached, you need to get a new charcoal can. they can be damaged by overfilling the fueltank which sends gasoline into the can. it is not possible to repair the can. if the problem persists with the vent line off the can and open to the air, you can try blowing in it... if you cannot get air through at all(a little resistance is normal) you can try to check the line for a pinch, or blow compressed air (from an air compressor but don't try to seal it in the open vent line, just insert it and hit the air) after trying to blow it clear try to blow ing again and see if it has cleared. if all else fails the tank must be lowered, the vent line removed, the obstruction in in the vent on the tank cleared, and then reinstall the fuel tank, preferably with a new vent hose on it. you do have a vent problem and the usual culprit is that charcoal can. hope this gets it done. good luck...

No the car runs fine and has been checked by a good macanic and he has no idea why it only does this after you put gas in it.

if removing the gas cap fixes the problem, it seems to me the problem is in the fuel tank venting system practically by definition. the tank is vented to the evap can under the hood. if it doesn't want to idle after fueling, but idles as soon you vent the tank, and doesn't reoccur when you put the cap back on, then something is clogging when fuel gets splashed in the fuel filler pipe/fuel tank, and gets unclogged when the negative pressure in the tank is released. there really aren't any other parts of car that can produce that failure/restore pattern consistently. if the problem is consistent, than it is in that vent line, the evap can, or the outlet(s) in the top of the fuel tank and/or fuel filler pipe for the vent line(s). i just can't see anything else doing it repeatedly. hope you get it solved.

Thanks

Did your mechanic do a evap test at all?

Thanks

Fordanswerman

__________________
FORD MOTOR COMPANY CAR AND POWERSTROKE SPECIALIST FOR OVER 16 YEARS. ASE MASTER SINCE 1991. CURRENTLY WORK AT A MAJOR FORD DEALERSHIP. GIVE ME YOUR FORD PRODUCT QUESTIONS, IF I HELPED, PLEASE HIT THE ACCEPT BUTTON. EXPERTS QUESTIONS ON FORDS WELCOMED

The car has been back to a garage at least 5 times, replaced many parts, and he doesn't know any more and he is a good Ford man. The car doesn't to start right up after you put gas in it checked the tank vents also. After I got it back the last time it quit shortly after I started it in the morning for two days. Then it hasn't done that anymore but sometimes when you put it in reverse there is hesentation. It seems to have a vacum leak but they have replaced everything they thought was the problem. The engine light is still on and the codes still say lean mixture.

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Yes he checked the coffie can and the line all fine

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Removing the gas cap doesn't fix the problem all I was saying is when the car wasn't running if I took the cap offand put it back on after a while the car started fine. It's only when I put gas in it that I have to give it gas to start. And the light is still on.