What to do if your fuel tank is not venting?

If you remove the vent line from the canister, you should be able to blow through the line to the tank. Take the gas cap off first. If that line is blocked, you’ve found where the problem is.

Why is my gas tank not filling up?

Every gas tank has a vent tube, so when you fill the tank, air can escape, while the fuel is being pumped into the tank. Some vent tubes are metal, some rubber. Yours is either collapsed or plugged up. Look at the fill tube in the firebird and follow it from the gas cap to the tank, there should be a 2nd smaller tube that is your vent tube.

How is fuel venting done on a GM Truck?

The gas cap is sealed, the venting is done through the line Tim mentioned. There are three lines to the tank. 3/8, 5/16, and 1/4 inch. 3/8 is the supply line. Fuel is pumped through this line from the tank to the fuel metering body. (No TBI on a 97 Vortec). The 5/16 returns excess fuel from the metering body back to the tank.

Why is my Chevy Silverado not filling up with gas?

Many owners of the Silverado report that the gas pump will automatically shut off repeatedly when they are trying to refuel their beloved pickup. Why is this happening? It turns out that the Fuel Evap Canister commonly gets clogged with dirt, especially if you drive the pickup on gravel roads.

Why does my Chevy Silverado not take gas?

My 05 2500 hd silverado had a check engine light on, which when read by a scanner said “evap, large leak” So I ignored it and contiued to drive it. Then recently I would stop to fill er up and the tank wouldn’t take gas at any more than a snails pace.

What to do if your gas tank won’t fill up?

What you need to do is show up at the dealer with a quarter tank of gas. Then take the service writer out for a test drive, go to a gas station and start to fill it up, show the service guy your problem. I will do that…..thanks so much. 1,000 Post Club!

When do I put gas in my truck?

When I go to put gas in my truck it stops after like 3 dollars worth of fuel. Since I know it’s not full, I click it again and gas shoots back out at me.

Why is my Chevy truck not filling up?

I was also told that if you overfill the tank, and top it off, it could flood the valve with raw gas, instead of just fumes, which will damage the valve, so I will not be topping off my tank anymore. Lesson leaned! Let me know if you have had a similar experience, as this is a common problem with ’99 thru 2010 Chevy trucks.

If you remove the vent line from the canister, you should be able to blow through the line to the tank. Take the gas cap off first. If that line is blocked, you’ve found where the problem is.

Why is there a hole in my fuel tank?

A kink would definitely allow the pump to put it in faster than it goes into the tank, and the way a fuel pump operates with auto shut-off is to have a little hole that takes advantage of the venturi effect to detect when the tank is full, without even actually being down inside the tank.

Where does the fuel line go in a GM Truck?

The fuel lines go up over the trans to the engine. The vent line continues into the engine compartment along with the rear brake line. The vent line goes to vapor canister mounted near the radiator on the drivers side.

Why is my fuel tank collapsing on my GMC Sierra?

I’m also having this problem with my 2000 GMC Sierra SL c2500 5.7. It creates a vacuum and collapses the fuel tank. Im on my third fuel tank but didn’t realize at first a vacuum was crushing it. Any ideas? It seems the more I read, the more possibilities that could cause it but its getting expensive with the tanks and pumps.

Why does my Chevy Silverado 1500 shut off?

Can anyone shed some light on this problem. After driving my 04′ Silverado 1500 all day without any problems, after the truck sat in the driveway for a couple of hours, the truck started right up, but then after about 10-20 seconds it shut off. It now continue to do this. It starts normally, but then shuts off.

When to know if your fuel pump is failing?

Another reason fuel pumps fail is regularly keeping less than 1/4 of a tank of fuel in your car. If your vehicle is displaying any of the symptoms above, or you suspect your fuel pump may be having an issue, have the vehicle inspected by a professional technician to determine if the pump should be replaced.

What’s the problem with my Chevy Silverado stalling?

REPLACEMENT OF CONNECTOR WHEN REPLACING FUEL TANK MODULE/FUEL PUMP MODULE. *TT ROUGH IDLE, SERVICE ENGINE SOON (SES)LIGHT, UNSTABLE IDLE, HESITATION, SURGE OR STALLING. WITH DIAGNOSTIC TROUBLE CODES P0300, P0335 OR P0336. *TT AIRFLOW SENSOR PROBLEM. *EH DIAGNOSTIC INFORMATION FOR INTERMITTENT VEHICLE NO CRANK DEAD BATTERY. *EH

Why is my gas tank making a thunk noise?

Heard some noise in the general area of the gas tank, hard to describe but not the fuel pump whine I heard in the past. On a whim, removed the gas cap (I had actually heard the gas tank making a ‘thunk’ sound while having the problems, and it relieved a bunch of pressure.

When your boat gas tank is not venting, this is the first area to check. If the screen looks clogged, use a small wire brush to clean away the gunk. If corrosion has eaten away at the mesh, replace the vent. Watch out, through-hull fuel vents sometimes allow water intrusion. Boating Magazine 3. Keep Your Through Hull Vent Dry from Water

What causes gas to come out of a fuel tank?

Also, the vent line cannot have a dip in it where fuel or condensation can get trapped in the line. If fuel becomes trapped in the line your tank will then build pressure or vacuum until there is enough pressure to purge the vent which will cause gas and/or odor to come from the vent line.

Where is the vent line on a fuel tank?

When installing a vent hose, avoid sags — aka traps — anywhere in the vent line. As I found out the hard way, these allow fuel to puddle, preventing the marine fuel tank vent system from functioning properly. A typical vent line will run sideways across the top of the tank until it reaches the hull side and then angle upward to the vent fitting.

Is there a problem with the gas vent on a boat?

Shortly after I had a new fuel tank installed, I discovered a problem — a boat gas tank vent problem. It was difficult to put gas in the tank. The nozzle continually shut down, as if the tank were full, until a gusher of gas spewed from the vent. Then I could fill up just fine.

Why is gas coming out of the vent on my Boat?

It was difficult to put gas in the tank. The nozzle continually shut down, as if the tank were full, until a gusher of gas spewed from the vent. Then I could fill up just fine. When I removed the portion of the deck covering the fuel tank to investigate, the cause became readily apparent.

Why is my fuel tank not filling up?

In your case you have a fuel tank that is not venting quick enough and causing your fuel back up problem. Your fuel tank has a two part tank with a crossover tube that equalizes the two parts of your tank. If the crossover tube or the fuel tank vent on top of the fuel tank is defective or damaged will cause the issue you are having.

Can you put fuel in or out of your tank?

The fuel level of your tank changes throughout the day, even if you are not driving it. You cannot put fuel into your tank, unless you can get the air out…and you cannot withdraw fuel from your tank unless you can let air in. Up through the 1960’s, most vehicles used vented gas caps. This is simply a gas cap with a hole in it.

How does a fuel tank vent work on a boat?

A typical vent line will run sideways across the top of the tank until it reaches the hull side and then angle upward to the vent fitting. The hose should run as straight as possible at this point in a manner that allows any fuel to drain back into the tank via gravity.

How to keep water out of your fuel tank?

If the screen looks clogged, use a small wire brush to clean away the gunk. If corrosion has eaten away at the mesh, replace the vent. Watch out, through-hull fuel vents sometimes allow water intrusion. Boating Magazine 3. Keep Your Through Hull Vent Dry from Water

Where is the venting on a gas tank?

Where does the gas line go in a GM Truck?

The vent line continues into the engine compartment along with the rear brake line. The vent line goes to vapor canister mounted near the radiator on the drivers side. If you remove the vent line from the canister, you should be able to blow through the line to the tank. Take the gas cap off first.

Why is my fuel tank not venting properly?

You might want to reroute your vent line to not have a dip, if fuel gets trapped in there it may cause the smell also it will not vent properly. Are your exhaust pipes close to the tank, heated fuel in the tank causes odors too. wraymen likes this.

What’s the best way to vent a fuel tank?

If so,it should be higher. Click to expand… All the posters have made some good suggestions, including you, even if you didn’t know the purpose of a roll over valve. The charcoal canister and having the vent line high enough is probably the best solution.

Can a charcoal canister be used to vent a gas tank?

To vent your tank you can either leave the line hooked to the charcoal canister or you can install a small breather filter on the end of the line somewhere and remove the charcoal canister. You may smell more fumes if you do this.

Why does my gas tank keep shutting off?

Spent today under the car pulling off the old evap canister and then proceeding to put compressed air through the lines to remove as much charcoal particles as I could. Got everything connect back together and went to fill up. Issue remains. Can get about 1.5 gallons in the tank before it shuts off.

What to do if your fuel tank is not venting?