I have a 2000 Toyota Avalon when I get on the gas it won’t accelerate now it starts then shuts right off

when I get on the gas it won't accelerate now when I start it it shuts right off

My car has 1500001 miles.
My car has an automatic transmission.

Experienced mechanics share their insights in answering this question :
Check for diagnostic trouble codes which might provide sufficient clues. If, though, no codes have been stored, you can consider the typical causes for immediate stalling which are a faulty mass airflow sensor, faulty engine coolant temperature switch/sensor (typically at cold start only), faulty camshaft or crankshaft position sensors, worn spark plugs, wires or defective ignition coil(s), inadequate fuel delivery or pressure (clogged fuel filter, injectors, faulty fuel pump or pump circuit), contaminated or old gasoline, defective throttle position sensor, faulty idle air control valve, leaks in the EGR system, intake vacuum leaks, and so forth. If you request an engine stalling diagnostic the responding certified mechanic will get this resolved for you promptly. If you have further questions or concerns, do not hesitate to re-contact YourMechanic as we are always here to help you.

How to Identify and Fix Common car Problems ?

Our sources include academic articles, blog posts, and personal essays from experienced mechanics :

An engine that is hesitating to accelerate is most likely dealing with a fuel/air mixture that is too lean. Engine`s that are running inefficiently will begin to show signs like hesitation which will only become worse over time.
The most common reasons a Toyota Avalon won`t start are a dead battery, an alternator problem, or failed starter. Search our network of RepairPal Certified shops near you to speak with a technician about your issue.
The Short Answer: The Toyota Avalon 2005, 2006, 2007, 2008, 2011, 2013, 2014 Models Should be Avoided. These models have a higher incidence of reported issues, including significant problems like engine failure and minor problems such as cracked dashboards.
Why does my Toyota hesitate when I accelerate? Toyota hesitates when you accelerate because of the electronic throttle control system. This can often be solved by installing a part called a Throttle Response Controller.
If your vehicle won`t start, it`s usually caused by a dying or dead battery, loose or corroded connection cables, a bad alternator or an issue with the starter. It can be hard to determine if you`re dealing with a battery or an alternator problem.
As long as you keep regular oil changes you should be fine for at least 400,000 miles.
Toyota Avalon, with a potential lifespan of 245,710 miles.
When you press down the accelerator pedal and get minimal output, it could mean you have a problem with your fuel system. The most probable issue is a clogged fuel filter. Your fuel filter works to ensure that dirt and debris do not get into the fuel system.
Worn Transmission Fluid (Automatic Transmission)

Over time, the transmission fluid gathers dirt and grime. This can cause the engine to run roughly, stall or fail to accelerate when you press down on the gas pedal. You may need to have a transmission fluid change before more damage is done.

This hesitation while accelerating can be the result of a number of issues, including something like a clogged fuel filter or even a broken fuel pump. Sometimes, something could also be wrong with the transmission.
An indication that a vehicle is not receiving the right mixture of air and fuel is if the vehicle jerks or surges forward at high speed. Several components of the fuel or air intake system could cause this jerking or surging sensation to happen. Issues within these systems can also cause fuel economy to worsen.
Culprits include a dirty fuel filter, clogged fuel tank strainer, clogged or failing fuel injectors, or a defective fuel pump. On most vehicles replacing the fuel filter is a DIY operation.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

I have a 2000 Toyota Avalon when I get on the gas it won’t accelerate now it starts then shuts right off
ANSWER : Check for diagnostic trouble codes which might provide sufficient clues. If, though, no codes have been stored, you can consider the typical causes for immediate stalling which are a faulty mass airflow sensor, faulty engine coolant temperature switch/sensor (typically at cold start only), faulty camshaft or crankshaft position sensors, worn spark plugs, wires or defective ignition coil(s), inadequate fuel delivery or pressure (clogged fuel filter, injectors, faulty fuel pump or pump circuit), contaminated or old gasoline, defective throttle position sensor, faulty idle air control valve, leaks in the EGR system, intake vacuum leaks, and so forth. If you request an engine stalling diagnostic the responding certified mechanic will get this resolved for you promptly. If you have further questions or concerns, do not hesitate to re-contact YourMechanic as we are always here to help you.

Vehicle won’t start, once it’s jump started it only stays running until you turn it off, then it work start again without jumping.
ANSWER : Hi there. There could be two problems here. It is possible that your battery is bad and will not take a charge from your alternator while driving. In that case every time you shut your car off you will not have enough juice to start it again. Inspect your battery – it should have at least 12.5 to 13 volts to start your car, if it doesn’t you will need to replace the battery. The second problem could be that your alternator is bad and not charging your battery, in this case you will need to replace your alternator. Both the battery and the alternator can be tested in your car. If you would like to have the car checked for you, a certified professional from YourMechanic can come to your car’s location to diagnose the starting problem and proceed with repairs.

Why doesn’t car start after running out of gas girlfriend ran gas out of car now won’t start plenty of gas in tank doesn’t sound l
ANSWER : Fuel pumps rely on liquid gasoline for cooling. Consequently, it is recommended to keep the fuel tank at least 1/4 full to prevent the fuel pump from overheating. If the pump is run to the point of being dry, the seal on the impeller can overheat and get damaged. Even if the pump subsequently runs, as you report your does, it cannot develop enough suction to pick up fuel due to the seal damage. That is possibly what has happened in your case but it should be confirmed prior to replacing the fuel pump. In your circumstance the recommended service is fuel pump replacement but if you request that, the responding certified mechanic will do enough tests to confirm that there is no other possible explanation for the failure. There is a quick and direct way to determine if the problem is lack of fuel. Procure a can of "starter fluid" from any department store. Using the material cautiously (it is highly flammable; keep away from flames or sparks), introduce some of the fluid into the intake of the engine while you engage the starter motor. If the vehicle starts and runs briefly, then you know for sure the problem is fuel starvation of course almost undoubtedly caused by the pump failing. Fuel pump replacement can be accomplished in the field, right at your location, if you desire that service.

Replaced battery after getting gas in the car. Is it the fuel that keeps the car from starting?
ANSWER : If the vehicle cranks over and does not start after getting fuel then the most common cause is the fuel vapor purge valve is allowing fumes to flow from the fuel tank to the engine while fueling. If purge valve is leaking then replace the purge valve. Hold the throttle wide open to clear the flooding of the engine.

My car shut off while at a stoplight. I got it started only for it to shut off agin. It starts then shuts off.
ANSWER : Hello, thank you for writing in. The vehicle is stalling due to an electrical issue (typically pertaining to power supply or a sensor), a lack of fuel, or a failure with the ignition (spark) system. You will want to start by scanning the vehicle for diagnostic troubleshooting codes. Use any information found there to help guide you to the system or component that is failing. Without that information, you will want to test the fuel pump, ignition cables, spark plugs, and alternator function. Further testing may need to be done based on those results. For more help with diagnostics, contact our service department to schedule an appointment.

Not getting enough fuel car will not run right. It stalls when you give it gas and stalls when it’s running. It’s a 1984 Ford Escort.
ANSWER : Hi there, thanks for writing in. Several early 80’s Ford’s swapped from carburetor to fuel injected engines; including your ’84 Ford Escort. However, there were two different fuel systems available that year. If your Escort has the fuel injected engine, one item I’d check is the EGR valve or clean the throttle body.

Both systems impact fuel delivery into the engine and if they are dirty or clogged with excessive carbon build up, can starve the engine to create this type of issue. If it’s the carburetor version, the carburetor might need to be rebuilt, or may be an issue with float bowls inside the carb.

If you need assistance diagnosing the exact issue, feel free to contact one of our professional mechanics to complete an engine is stalling inspection firsthand at your own location.

Let truck get low on gas. Will not start now unless I add some gas to the tank.
ANSWER : It sounds like you are running out of gas. It is possible that your fuel level gauge or sending unit may be faulty, not showing the true level of fuel. Try adding more than a few gallons to see if the fuel gauge moves. Next time it acts up, try opening the gas cap without putting any fuel in and see if starts. If it starts with the gas cap removed, you may have a vent solenoid failure. If you’d like to have an expert check this out, a certified technician from YourMechanic can diagnose the starting issue to verify any faults.

I ran Outta gas and put gas in it and it still won’t start
ANSWER : If the car was run completely out of fuel, there is a chance that the fuel pump may have been damaged. The fuel pump relies on the fuel in the tank to keep it cool, lubricated and functioning properly. In the event that the tank is ever run dry, this can cause the fuel pump to burn up. I would suggest having a professional from YourMechanic come to your location to diagnose and replace your fuel pump.