Question about 2007 Toyota Tundra

2 Answers

Why do they tell you not to overfill gas tank

2007 tundra 2wd 5.7 engine

Posted by on

  • Patche Sep 26, 2008

    Why

  • Patche Sep 26, 2008

    why do they tell you not to overfill the gas tank

×

2 Answers

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Toyota Master
  • 1,861 Answers

The actual reason is maximize your fuel mileage.
The engineering is as follows:
There are times when the fuel injectors shut off when you are driving, like going down a long hill. There is no need for the injectors to "work", as you are coasting without giving it any gas. But, the engine will stall out with no injector action. So, how does Toyota keep the engine running? From the gasoline FUMES in the fuel tank. There is a tube on top of the fuel tank whch siphons the fuel vapours...The vapours then are stored in something called a charcaol canister, in which the "charcoal" absorbs the fumes from the tank, and, when coasting, the injectors stop injecting, and the stored fumes are admitted into the intake manifold thru a valve controlled by the Electronic Control Unit, or ECU. The fumes are used by the engine, thusly maximizing your mileage, other than losing them by letting them escape out from under the fuel cap. Now, to answer your question: If the vehicle is "overfilled", there is no place for the fumes, other than in the top of the filler neck. And the siphon tube is on top of the tank. The ECU sees the overfill condition as a "blockage" in the fuel fume vent line (only fumes should be in this tube), and said "blockage" will transmit this to the ECU, thru a sensor, & turn on your check engine light. The overfill actually "lies" to the ECU, even though there is nothing wrong. Best thing to do: When filling the tank, stop after the handle clicks off.
I hope that I have explained this to your liking.

Posted on Sep 26, 2008

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 3 Answers

When you overfill the gas tank, it triggers Codes 0441 and 0455 (emission codes) which are difficult to solve. The gas goes into the charcoal canister meant only for vapors and you have to replace the unit which is about $600.00 for the part alone.

Posted on Mar 17, 2009

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

2 Answers

Where is oil filter located on 2011 Toyota tundra 5'7l


Mark, Complete instructions on how to oil and filter change link below.
"I hope this helped you out, if so let me know by pressing the helpful button. Check out some of my other posts if you need more tips and info."
DIY Oil Change pics 5 7L

how to change the oil on 2009 toyota tundra

Oil Filter Change Toyota Tundra 2007 2013 2007 Toyota Tundra 4 0L V6

Feb 29, 2016 | Toyota Cars & Trucks

2 Answers

My 2001 tundra turns over and everything works but wont start has half tank gas


If it has known good spark and fuel pressure try spraying carb cleaner in the throttle body while cranking engine to see if it will crank.

Sep 10, 2015 | 2001 Toyota Tundra

2 Answers

How do I fix my 2006 Toyota Tundra SR5 4.6L V8 Double Cab - Innova Can OBD 2 - Code # P0455 Evaporative Emission System Leak Detected (gross leak/no flow)


Looks like you've got 1 of 2 scenarios. 1. A vacuum leak on the lines running to/from your charcoal canister. This sucks up any gas vapors and stops them from leaking into the atmosphere, hence the smell of gas when near a vehicle that isn't running, much like a rotting/rotted gas tank, fuel lines or a gas cap on older cars. Gas consumption will increase until this is fixed properly. Usually just a crack in a vacuum line, a broken plastic connector, or the charcoal canister has gone bad. 2. It could be due to an over-fill issue at the gas pump, causing excess gas to trip a sensor in the fuel filler tube area. A typically known and problematic issue dealers try to charge up to $1600 to "repair" as it doesn't actually ix the problem permanently. If scenario 2 is the issue then it's a manufacturing defect in the design of the fuel system that cannot be permanently or properly fixed easily. Just watch the pump and make sure it doesn't overfill the tank. If it does, then just use an OBD scanner and clear the code. It will stop coming up one the overfill fuel sensor has started to dry-up. Good luck.

Dec 16, 2014 | Toyota Cars & Trucks

1 Answer

Where is the fuel filter on 07 tundra 5.7


Inside gas tank it is part of fuel pump assembly, not serviceable.

Jul 23, 2012 | 2007 Toyota Tundra

1 Answer

I have gas lecking from top of gas tank on 2007 tundra what is it


Hi and welcome to FixYa!
The Fuel hose can be worn out that's why the fuel leaks. As a first course of action, Have it replaced to resolve the problem plus it's safer for fuel is highly flammable.
Hope this helps and thank you for using FixYa! Have a good one!

Mar 25, 2011 | 2007 Toyota Tundra

1 Answer

MISFIRE # 1 WHAT SIDE IS IT ON WHICH SIDE IS THE # 1 PLUG ON


The left (drivers) side cylinder head is numbered from front (radiator)
1-3-5-7

The right (passenger) side cylinder head is numbered from front
2-4-6-8

per 2001 Toyota repair manual page EM-103 and 105. The numbers are not on the engine, from what I can see, but the manual is very specific on this info.
2001 Toyota Tundra Access Cab SR5 2WD
4.7 liter DOHC V-8 (2UZ-FE)92780649.gif 2001 Toyota Tundra Access Cab SR5 2WD
3.4 liter DOHC V-6 (5VZ-FE) 92873946.gif
http://autorepair.about.com/library/firing_orders/bl-toyota-firing-01.htm

Jan 18, 2011 | 2001 Toyota Tundra

1 Answer

EGR CODE PO449


The cannister vent valve is bad. You overfilled the fuel tank, didn't you? Well, now you have to change it.. Here is the description of the circuit: This diagnostic procedure supports the following DTC:
DTC P0449 Evaporative Emission (EVAP) vent Solenoid Control Circuit
It is the round thing on the back of the gas tank, on the top side...
Don't overfill fuel injected vehicles with fuel any more. Fuel gets sucked into this valve and causes instant major damage.

Thanks.

Dec 22, 2010 | 2006 Chevrolet Silverado 1500 2WD

1 Answer

2007 tundra check engine lite on


There is a Air Injection Sensor/Switch that can be replaced without replacing the Air Pump on the 2007 Tundra 5.7L. The actual AIR Pump itself has a part number of 176100S010 and cost around $1112.84. I cannot find anymore info on the sensor/switch. Srry

Dec 10, 2009 | 2007 Toyota Tundra

1 Answer

How to check transmission fluid 2007 tundra 2wd 5.7L


you dont, there is no dip stick, you need to remove the fill plug over fill the transmission then remove the check plug and drain the fluid to a trickel and reinstall the plug. would recommed taking to the dealer if your haveing shift issues, or if its leaking. those transmissions dont like to be over/under filled as little as 500ml can cause problems

Nov 04, 2009 | 2007 Toyota Tundra

Not finding what you are looking for?
Cars & Trucks Logo

2,052 people viewed this question

Ask a Question

Usually answered in minutes!

Top Toyota Experts

yadayada
yadayada

Level 3 Expert

60792 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

21949 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

6811 Answers

Are you a Toyota Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...