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Driving along fuel leaks out of fuel cap i undo the cap the fuel just floods out and there is alot of air in the tank

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It sounds like your tank vent is or has failed. You can get a replacement part at a store like this.
http://www.volkswagenpartstore.com/Volkswagen_Passat_16056.html

Posted on Mar 23, 2011

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Posted on Jan 02, 2017

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Po442 code for 2002 grand caravan


this relates to a slight leak of fuel vapour to atmosphere from the EVAP system , to check undo and refit gas tank cap and clear code , then drive for a day and rescan for code , if reappears then the EVAP system will need inspecting for leakage

Jun 02, 2015 | Cars & Trucks

1 Answer

Evap emmission,control sys leak


Do not top off your gas tank. The gas is going into carbon canister which is only for fuel vapors to go into (carbon canister opening near the top of fuel neck near the gas cap). Your flooding the fuel vapor canister with liquid fuel; of course you are going to get a sensor message... 'Evap emmission,control sys leak

P0443 The fuel vapor canister reduces that gas smell on hot days outside/inside of car. The fuel vapor canister fillers bad smells from gas tank on hot days when the gas expands and burps fumes through carbon canister filter. From the canister (gas vapor fumes) goes back into the engine to be burned again...it's a closed loop for vapors to be recycled though engine. Don't worry, once the carbon canister dries out and no longer flooded with raw fuel the code should go away...just don't let the top off fuel tank back flow into the 'Evap emission control' carbon filter near the top and close to the gas cap...:)

Apr 20, 2014 | 2000 Ford Mustang

1 Answer

Grand vitara,why does the fuel tank **** in air when you undo the filler cap,diesel


Many cars and trucks do this.
I\'m going to give this a shot.
The emissions system on cars is there because of pollution.
One of the biggest polluters is gasoline vapors.
The reason for the vacuum is the car has been designed to suck the fumes from your gas tank and burn them, to slow down the pollution .
Most of the cars I maintain do this same thing.
You break that vacuum seal when you open your fuel cap, and when you close it, the system again tries to vacuum your fumes out of the tank.
Be Blessed.

Jan 23, 2013 | 2001 Suzuki Grand Vitara

1 Answer

Volkswagen jetta code P0171


P0171 VOLKSWAGEN - System Too Lean engine cylinder Bank 1
Possible causes- Intake air leaks
- Faulty front heated oxygen sensor
- Ignition misfiring
- Faulty fuel injectors
- Exhaust gas leaks
- Incorrect fuel pressure
- Lack of fuel
- Faulty Mass Air Flow (MAF) sensor
- Incorrect Positive Crankcase Ventilation (PCV) hose connection
P0455 VOLKSWAGEN - EVAP System (fuel vapor storage and control) Large Leak Detected
Possible causes- Missing or loose fuel cap
- Incorrect fuel filler cap used
- Fuel filler cap remains open or fails to close
- Foreign matter caught in fuel filler cap
- EVAP canister or fuel tank leaks
- EVAP system hose leaking
- Fuel tank leaking

Aug 09, 2012 | Volkswagen Cabrio Cars & Trucks

1 Answer

Ive got an 1988 corvette sometimes it takes 3-7 tries to start whether cold or warm and other times it starts fine and has also stalled out while driving down road


Sounds like it could be a fuel pump or a fuel pressure regulator depending on the engine you have. Usually when it takes more than a second or two of turning it over before it will start means the fuel is going back down the line when not running. This can be because of a leak, not fuel leaking out but air leaking in, the fuel system or it can be as easy and a gas cap not properly venting/letting air into the tank as the tank empties. If it doesn"t let air in the tank, then the fuel that is being pumped out is creating a vaccum and sucking the fuel back into the tank when you shut the car off. Try opening the gas cap and letting some air get in just before you shut the car off. Then if it fires right up next time you know you need to replace the gas cap. If not check for vaccum leaks around the intake. Good luck.

Oct 03, 2011 | 1988 Chevrolet Corvette

2 Answers

I have a 2003 mitsubishi lancer I'm getting the


Inspect for crack on the air intake tube between the Mass Air flow (MAF) to the intake manifold on the motor.
A loose clamp or crack on the air passage way will cause this problem.
=====
P0442 code takes 2-5 drive cycle to reset by itself.
Do some mix city / highway driving.
If there is no EVAP leak then it should be clear within 50 miles.


Aug 11, 2011 | 2003 Mitsubishi Lancer

1 Answer

A light on upper dash came on, same time gas leak on passenger side a drip, friend over filled tank. It stopped gas drip when gas cap tightened and was checked for leak in tank. It has happend today. ...


sounds like your canister vent valve is blocked or the charcoal canister is flooded with fuel. if you drive alot of dirt roads you can clog this vent valve causing backpressure in the tank. you may have to go to a reputable service shop so they can test the evaporative emissions system and get an accurate diagnosis.

May 26, 2011 | 2002 Chrysler Town & Country

2 Answers

2003 chevy 1500 has a code that says large evap leak. Where do I find this leak?


"Where" to find the leak is in your evaporative emmissions system. Most of the time, a good visual inspection will turn up the culprit. First, check the fuel cap. Look at the rubber O-Ring that seals it against the fuel fill tube. If it is cracked or looks like it is crushed down, replace your fuel cap. If that all looks OK, then you can check the rest of the system for obvious cracks, or leaks. Start with the Evap Purge line. You can identify this in the engine compartment as a plastic vacuum line about 5/16" in diameter and it has a service port on it with a green cap. Check the plastic line for cracks. Then check the rubber components that connect to this line on both ends. One end will go into the Purge Solenoid and the other will go into a steel line that runs along the frame rail under the vehicle. Follow this steel line to where it goes and inspect all connecting hoses, tanks, etc. there will also be rubber hoses at the fuel tank area and some that connect to the fuel fill tube. Check all of these for any visual signs of damage or leaks. Also check for badly corroded metal parts - especially near the fuel fill tube. Sometimes the metal tubes get rusted through and cause leaks.

If a thorough visual inpection does not lead you to a suspect, then the system will have to be "smoke-tested". This is where the system is filled with smoke under a slight amount of pressure so the leak can be seen where the smoke comes out.

Feb 23, 2011 | 2003 Chevrolet Silverado 1500

1 Answer

The car acts like it is flooding,while driving it.It will sputter along then it will cough and then runs fine for awhile.I have put in several cans of injector cleaner,not alot of help.I popped out the...


It sounds like the fuel pressure regulator is not working.Too much fuel pressure at low speeds, and at idle,not enougfh fuel return into the tank.This may flood the intake ports and too much injector cleaner may destroy the in line fuel filter it may not be filtering the fuel,just bypassing the filtering ,like no filter at all.

Sep 16, 2010 | 1990 Chevrolet Corsica

1 Answer

2003 fuel smell


could be an exhaust leak, or a bad gas cap.  gas caps have a vent that allows air to escape from the tank safely, if you notice a depressurizing sound when you take the gas cap off it should be replaced, it's possible that the air is building up in the tank and leaking out somewhere it shouldn't be, in which case this is very unsafe so please be careful if you must drive it this way.

Oct 31, 2008 | 2001 Ford Escape

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