Jetta 3 cli fuel system dirt in tank

What are the indications of bad gasoline?
A:

QUICK ANSWER

The symptoms of bad gas involve a lean misfire, which creates a P0300 code in newer cars, engine detonation and pinging, sputtering and stalling. These occur because the bad gas fails to keep the fuel system clean and introduces contaminants that can clog fuel filters, fuel pumps and fuel injectors. In addition, bad gas can have an octane rating lower than advertised, leading to the aforementioned detonation and pinging.

FULL ANSWER

Receiving bad gas from a fueling station is more common than the industry admits. The only cure for fixing bad gas is to drain the fuel tank and fill it with fresh gasoline while cleaning the fuel system in the process. Bad gas can be caused by gasoline suppliers not mixing the required amount of additives in the fuel, causing them to be less effective in preventing deposits and causing fuel varnish to form in the fueling system. Sometimes the tanks, whether at the fueling stations tanks or in the vehicle's own fuel tanks, are contaminated with dirt, corrosion and water. Because no filtration system is absolutely perfect, even with the various filters and stringent EPA requirements in place, these contaminants end up inside the car and may damage it. Gasoline that is lower in octane often occurs because either the supplier or the fueling station intentionally sells regular fuel as higher octane, profiting over the difference in price.

Was there a tanker truck filling the stations tank while you were refilling?
You may have got some dirty gas.
When the stations tanks are being refilled dirt gets stirred up from the bottom of the tank.

How long ago did you have the engine tuned up? Could be that that the engine needs a tune up. If it was running fine and then all of a sudden it started running bad then it could be you purchased some gasoline with water in it. Don't buy gasoline if you see a gasoline tanker truck at the gas station and the tanks are being filled.. All that is happening is the gas going into the tanks is sturring up the dirt and debris in the tanks. Kind of like stirring kool-aid in a glass of water. Also worse is if the tanker truck is there and the tanks are being filled while its rainning or been raining all day with lot of nice water puddles were until the caps were removed to fill the tanks from the tanker and the water fell in the tanks. If its bad gasoline that is making your car run bad, you can buy an additive at the auto parts that you can pour in your gas tank to help burn the water out of the gas. Hope that all you need is the additive. Good luck.

There is likely an issue with the vent control side of the EVAP system. I am also willing to bet the check engine light has been on since this problem started? This is a complicated system and i would recommend having a shop (either the dealer or an independent shop that you have experience with) take a look at this.

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How long has this been going on? Could be a bad tank of gas... do you fill up at good stations like Chevron or the cheap Mexican ones? Also if you filled up when the tanker truck was filling the station you may have ended up with a tank full of sediment; there's a lot of gunk in their underground tanks and when the tanker tops it off the filling action stirs up a lot of that ****. Try filling the tank with some high-quality 87 octane (91 will make it worse) after putting a bottle of fuel system cleaner in the tank. You should also try pulling the codes; some codes do not cause the check engine light to illuminate but are still stored by the PCM. If all else fails, go back to the basics... fuel, spark and pressure. If you can eliminate two you should be able to make your job easier.

hi this is the fuel vent line, or breather hose from the tank, you need to locate this under your vehicle should be roughly half way down the filler, or in some cases on top of the fuel tank, it is possible it is blocked with road dirt as they normally do..just a tip for you when you access the hose, extend the hose so it does not fill with dirt and you should be ok...hope this helps please rate thanks

you might be a victim for crappy gas for the gas stations. some places known for it is speedway and such low end places make sure you get gas from the better places like mobile or shell and never fill up at a station that a tanker is filling the station up you will get sediment that the tanker stirred up when refueling the underground tanks. they have screens to try and filter it out but stations don't care. i have known some stations after hours run water in there tank to stretch out there fuel supply and it lowers the octane to the point you'll never get combustion to fire the engine. you'll have to either jack up the vehicle and take the filter out and turn on the pump to get all or most the fuel out or complain to the gas station and try and get a reimbursement. and put some fresh fuel in.only thing you can do.and while the filter is off good time to change it 5 -10 dollar part.hope this helps ya. best way to check is get some in a cup and pour a little on the ground and try and light it if it don't fire or smell strong sorry your a victim off low octane watered down gas. i might be out of place here but it happens to many many people everyday.

Try getting your gas some where else and make sure that the octaine of the gas you are getting is at least 88 or higher. Freestars run much better on higher octaine fuel plus you will get better millage.
And when you get gas look to see if there is a tanker truck filling their tanks. If there is go some where else because you will be getting some of the gunk that normally is settled in the bottom of their tanks.
Every filling station has gunk in the bottom of their tanks, Water,Rust,Dirt, you name it it's in there.
They will tell you that they don't but beleive me it's in there.
I ran service stations for years, I've never seen a tank yet that didn't.

REMOVAL PROCEDURE

1. Disconnect the negative battery cable.
2. Drain all the fuel from the tank.
3. Install and tighten the drain plug. Tighten Tighten the drain plug to 20 N.m (14 lb ft.) .
4. Remove the fuel tank.
5. Remove the retaining screws from the fuel tank.
6. Remove the fuel pump assembly from the fuel tank.
   1. Cover the fuel pump opening in order to prevent dust, dirt, or debris from entering the fuel tank.
   INSTALLATION PROCEDURE
   
   
   1. Install the fuel pump assembly. Tighten Tighten the fuel pump assembly mounting bolts to 3 N.m (27 lb ft.) .
   2. Install the fuel pump assembly retaining screws.
   3. Install the fuel tank assembly.
   4. Fill the tank with fuel.
   5. Tighten the fuel filler cap.
      1. Connect the negative battery cable.
      REMOVAL PROCEDURE # 2
      REMOVAL
      
      CAUTION: When repair to the fuel system has been completed, start engine and check the fuel system for loose connection or leakage. For the fuel system diagnosis, see Computers and Control Systems/System Diagnosis.
      
      
      1. Disconnect battery ground cable.
      2. Loosen fuel filler cap.
      3. Drain fuel. Tighten drain plug to the specified torque after draining fuel. Torque: 20 N.m (14 lb ft) - M8
      4. Remove fuel tank assembly (1).
      5. Remove fuel pump (FP) assembly (2) fixing screws and remove the FP assembly.
      NOTE: After removing FP, cover fuel tank to prevent any dust entering.
      INSTALLATION
      
      1. Install FP assembly (2).
      2. Install fuel tank assembly (1).
      3. Fill the tank with fuel and tighten fuel filler cap.
      4. Connect battery ground cable.

Hello tirckydad_4: If this problem begun, immediately after filling your gas tank, my first guess based on your description would be that you bought some bad gas. Try adding some fuel cleaner to your tank. This should help, but the only way to get rid of the bad gas is to use it, or siphon it out and put some gas in from a different gas station. As a tip, try to avoid filling up when you see a fuel tanker re-filling the tanks at the gas stations. Theory goes, then when the fuel tanker is re-filling, the gas station fuel tanks, it is sirring up old sediment that usually has settled at the bottom of the tank. Sediment that has been pumped into cars can cause cars to run sluggish.