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Old 03-11-2022, 07:47 PM #16
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@negusm Thanks for the thorough writeup my 01 is at 220k it might come in handy.
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Old 03-11-2022, 08:52 PM #17
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Quote:
Originally Posted by MStudt View Post
I'm guessing it was most likely your charcoal canister rather than the check valve gasket. If the gasket were bad you would smell gas every time you filled up. Side note, replacing the charcoal canister and not the gasket at the same time would most likely result in that gasket failing shortly after. So it's a good thing you replaced the gasket during this process.

Also, there are a couple different part numbers for the rear charcoal canister, and it's important that you match the correct one to your vehicle. If you use the incorrect one you'll have a hard time starting it the first time after filling up, and it will progressively get worse.

Mike
Cool, you could be right that it was the canister...after 20 years, I decided, it's just not worth figuring it out. Everything was suspect.

Can you post the alternate part numbers for the canister? It helps people out. I did not find any other part number for 2001-2002 and it's supposed to be for all trim levels. "77740-35482" does replace a prior part number "77740-35481" but the old one, if you find it, should work.
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Old 08-19-2022, 05:36 PM #18
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@negusm Thanks for the thorough writeup my 01 is at 220k it might come in handy.
Thanks again @negusm , 5 months 5k mi my turn.
I ran my VIN made 11/00 Olathe Toyota web site 82 replaces 81 either will work @ $328 now.
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Old 10-06-2022, 02:59 PM #19
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Question Hose Diameter

Hey first off thanks for all the great information! I was talking to a tech at my local dealership the other day and I had mentioned I wanted to go through and start replacing my fuel system and evap system. He mentioned to look up nylon hoses instead of going with the traditional tubing but I would just need to figure out the inner diameter of the current hosing. Do you by chance happen to know what it is? I'm afraid of pulling a line off and breaking it and then leaving my vehicle stuck sitting there until everything is ordered and arrives. TIA!
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Old 11-16-2023, 05:43 PM #20
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Finally got around to it.

Using should of spent parts list shopping around now costs $808.46. Not bad considering.
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Old 11-17-2023, 11:32 AM #21
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Quote:
Originally Posted by MStudt View Post
I'm guessing it was most likely your charcoal canister rather than the check valve gasket. If the gasket were bad you would smell gas every time you filled up. Side note, replacing the charcoal canister and not the gasket at the same time would most likely result in that gasket failing shortly after. So it's a good thing you replaced the gasket during this process.

Also, there are a couple different part numbers for the rear charcoal canister, and it's important that you match the correct one to your vehicle. If you use the incorrect one you'll have a hard time starting it the first time after filling up, and it will progressively get worse.

Mike
I'm wondering if the Check Valve is my issue? I'm getting no codes, but sometimes I get a strong gas smell around the fuel filler neck. Its REALLY bad when I go offroad, but it happens every once in a while.
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Old 11-17-2023, 04:00 PM #22
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I'm wondering if the Check Valve is my issue? I'm getting no codes, but sometimes I get a strong gas smell around the fuel filler neck. Its REALLY bad when I go offroad, but it happens every once in a while.
That is most likely the check valve on top of the tank.

Mike
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Old 11-20-2023, 05:02 AM #23
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Quote:
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I'm wondering if the Check Valve is my issue? I'm getting no codes, but sometimes I get a strong gas smell around the fuel filler neck. Its REALLY bad when I go offroad, but it happens every once in a while.

Is your EVAP readiness monitor set? If itís not it will not code EVAP issues.


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Old 12-23-2023, 06:26 PM #24
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P0440, 0441, 0446 Codes

Thanks for the great write up! I currently have 3 codes and the smell of gas outside of the car. Additionally, several months ago I was off-roading and on a steep incline and smelled gas. I looked under the car and saw a stream of gas flowing out of the top of the tank.

I've spent the weekend diagnosing potential issues using the tests found in the FSM and another thread titled: "P0440 Fixed!". A fuel tank pressure test revealed that a large amount of air was flowing from the check valve. I put my hand through the hole in the floor under the back seat and felt air coming from the check valve. I also performed a test to check the check valve and it failed. I also tested the VSV on the charcoal canister and it failed (it was as if there was no longer a valve inside). While the charcoal canister was out I performed pressure and vacuum tests on the canister. It passed the pressure tests but failed the vacuum ( I was not able to achieve any vacuum). The charcoal in the canister can also be easily heard when moving it or shaking it.

I've come to the conclusion that my check valve/gasket is shot and the charcoal canister needs to be replaced. Due to the cost of canister I'm planning on fixing the issues on the tank first and going from there. I've ordered a new check valve/gasket and a cut-off valve. I'm having trouble finding a gasket for the cut-off valve and appreciate any help! If there are any suggestions as well please feel free to share.
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