rkohou

Hi to all!
This is my first post.
Have 02 rx300 with 29K on it. Car runs perfect. Bought it when it had 8K year a go. Prior to me buying the car, it was sitting for 2 years outside. Had some problems related to that- tires, brakes,some gunk in the fuel tank. Than there was that refueling issue. When pumping gas the pump just clicks off after 1 gallon. Second after I would hear wusssh sound from somewhere under need the gas tank, and the refueling can continue. Last week I was in Vermont and the subzero temps. just made the problem worse. It took me 15 minutes to fill up and the pump would just click off after every 0.2 Gallon. Now I know there is Charcoal canister down there, vent lines and fuel tank vent valve. I just have no clue where to begin. I know I can get the vent valve for $30 but have no idea if that is the problem. I need some help with this one. Now CELs.
Any help is appreciated.Roman

carguy07

Maybe?

https://www.clublexus.com/forums/rx3...at-a-time.html

salimshah

now cel ... is it no cel or now (there is) cel.

Next time at the pump insert the nozzle all the way to the hilt, then pull back about 1/2 inch.

Salim

rkohou

Sorry no CEL.

salimshah

Gas (vapor) recovery system is not generating any code.

This means the charcoal canister + pipes are OK.

I would suggest try different pump or do the trick of pulling back 1/2" or so.

Salim

rkohou

I have tried several pumps in more than one state and the problem is the same on all of them. Same sound comes out like pressure is relieved from the tank prior to the tank accepting the fuel.

rkohou

I will add some more info to the post as I did on my other forums. If it ignites a spark in memory please reply.

QUOTE (smooth1 @ Jan 6 2009, 08:06 AM)
well, if it's running fine and not stalling, then I would think you just have a restricted vent hose, or intake relief valve may be getting stuck. If you had a fuel pump or shrader valve issue then it would be accompanied by engine stalling, and vacuume in the tank when you released the gas cap.


I do have vacuum in the tank when I release the gas cap. It makes the hissing sound for at least 3-4 seconds. The history of the car goes like this. The prior owner had died when the car had 8K miles on it. It was left outside for 1,5 years with 5 gallons of fuel in it. When I purchased it and filled it up it would stall left and right. I got most of the fuel out and filled it up with some gasoline cleaning products 1-2 gallons. (octane booster, gas dry, gas preservative etc.) after that the car died only once. When started again it runs like a dream till now. 33K today. There was always problem with the fill up. In the summer it is less pain as the wussh sound comes out of the charcoal canister the pump will work till it fills up. When the temperature goes down to 20-10-0F it is a nightmare. max 0.5 gallon at a time before it clicks off. Then I have to wait and put 0.5 gallon more. so on so on. 15 minutes at the pump just kills me.
THNX Roman

salimshah

Can you please tell, where you hear this hiss sound come out of .. you mention canister, but for my understanding, it has to be near the gas cap area for you to pinpoint it.

My guess is one of the pipes is clogged up [as it gets cold, the thing just shuts off]. A total disassembly of the tank, all hoses removed and checked and put back would help.

I will try to look up at the piping and make an educated guess. As you fill the tank, the same amount of air gets displaced from the tank and that may not be happening [it does happen but the rate of outflow of air is restricted for you].

Salim

salimshah

There is a tube that comes from top of the tank and then makes a Y connection with the filler tube. Have that pipe cleaned out and your problem will be solved.

Salim

03RX300SH

Hi.

I have the same probelm refueling our 2003 RX300. Curious how did you fix the problem?

salimshah

There are 2 options either try to get it from the fill-cap side or from the tank.

Try peering through the filler hole and see if you can spot the breather tube hole. With a blunt tip fish-tape you can try reaming the vent tube .. if you can get to it.

Salim

03RX300SH

You are right on. Tried your idea and it worked. Thanks so much!

salimshah

Great!

For rkohou's benefit, can you write the steps you took.

Now just be aware that what ever the junk was, it is in the fuel tank. Remember to keep your tank 1/2 full or a min of 1/3 full.

Thanks

Salim

jliu

when my 2000 rx300 alert that the gas tank need to be filled, it's only filled around 10gal to full the tank. what's wrong with that?

salimshah

Welcome to CL.

Other than light, what does the gauge show?

If your gauge is showing low then have the float (sending unit in the gas tank) checked out

Salim