Engine dies when not applying gas

truck dies when not applying gas,cleaned first spark plug on passenger side, it worked until i put new plugs in. Put old plugs back in now its back to running bad again.

My car has 145000 miles.
My car has an automatic transmission.

Experienced mechanics share their insights in answering this question :
Hi There,
It sounds like you may have a fuel supply problem in getting the proper amount of fuel to the fuel injectors. As you know, when you turn the key to on, the fuel pump is activated and the fuel system is primed with fuel at a specific pressure in order to supply the fuel injectors with enough fuel to start the motor. When this is less than what is needed in order for the motor to fire or in some cases higher than normal, you may notice an erratic fluctuation in engine RPMs, hard starting or a lack of power when accelerating as the engine may be starved for fuel if insufficient fuel pressure exists in the fuel system. This can happen when the pump itself is not working properly or when the fuel pressure regulator is not maintaining the proper fuel pressure in the fuel system causing the engine to starve for fuel. This can also happen when there is insufficient connectivity to the fuel injectors which can cause an intermittent fuel spray pattern into the intake system resulting in a lean fuel condition or the motor otherwise starving for fuel. I would recommend having an expert from YourMechanic come to your location to diagnose your fuel system.

How to Identify and Fix Common car Problems ?

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

Common reasons for this to happen:

A defective TCS or torque converter solenoid can also cause this issue. Low fuel pressure, dirty or defective fuel injectors, or broken fuel pump: The fuel pump is responsible for transferring fuel from the tank to the engine.

If your Ford F-150 has no power when accelerating, there is no need to fear. Many common issues can cause this to happen. Catalytic converter clogs, clutch faults, transmission issues, bad torque converters, and gear slippage are all causes of the power lack.
Once the vehicle determines the systems are safe, then the vehicle allows you to restart. The fuel pump shut-off switch is located behind an access panel on the right side of the luggage compartment. The fuel pump shut-off switch has a red reset button on top of it.
Powertrain issues, problems, and complaints are some of the most common concerns that owners of 2021 Ford F-150 trucks have been experienced. Some of the most frequently reported issues include problems with the transmission, engine trouble, and difficulty with the four-wheel drive system.
If the vehicle randomly shuts off while driving or stationary, there is usually an issue with the engine. Typical patterns here are issues with the ignition system, mixture preparation or fuel. A known error here is that the vehicle was refueled with the wrong type of fuel.
When your engine shuts off when you slow the car down its often as a result of a: Malfunctioning transmission. Low fuel pressure, dirty or defective fuel injectors, or broken fuel pump. Bad oxygen sensor or mass flow sensor.
SUA happens when an electronic malfunction occurs inside of the vehicle, causing the throttle to expand and the vehicle to accelerate without the driver`s intervention. Aside from unexpected acceleration, SUA can also prevent drivers from braking or returning the vehicle to idle if it is in gear.
There are several causes for your car to lose power significantly while accelerating. The most typical causes of a car not accelerating while driving include a faulty sensor, contaminated fuel or air filters, or a faulty timing belt.
The switch will usually come with a reset button that will reactivate the fuel pump if the switch was tripped. The fuel pump switch is an electrical component, and just the same as the rest on the vehicle, over time it can wear out and develop issues.
If the fuel pump relay fails the fuel pump will be left without power. The engine may still crank when the key is turned, however it will not be able to start due to lack of fuel. This symptom can also be caused by a wide variety of other issues, so having the vehicle properly diagnosed is highly recommended.
No car in the history of the automobile industry is perfect, and the Ford F-150 is no exception. Some of the worst model years of the Ford F-150 (and the ones you should avoid buying) are 2004, 2005, and 2010.
What years did the 5.4 Triton have problems? Based on my research, 5.4 Triton engines from vehicles manufactured between 2004 and 2013 seem to have the most problems. The earlier engines didn`t seem to have as many issues, nor do the ones produced after 2013.
Cars shouldn`t shut off while driving, but when they do, the most common culprits are: A bad crankshaft position sensor. Other sensor issues in the engine. A faulty fuel system.
If your battery is fully dead, you`ll need to jump-start the vehicle and manually charge it using an external adapter or change it. Fuses – If the car dies while idling but restarts, there`s a possibility that there might be an issue with the fuses of the car. It`s conceivable that one of the fuses has blown.
Many modern vehicles are designed with several fail-safes to help protect the engine in adverse conditions. One of this is an automatic shutoff when the oil pressure drops to a certain level, or the oil level drops too low (note that this is not true for all cars). This causes the engine to stall and die.
There are three major causes for a stalled engine: A lack of fuel, a lack of air flow and improper ignition. Running out of fuel is one of the most common causes of engine stalling, but dirty fuel injectors or a plugged fuel filter can also be the culprit. Your engine needs air to run properly as well.
If your car`s transmission has an internal pressure problem, it can cause the torque converter to lock up, causing your car to stall. Though not as often the culprit of engine stalling than others, the transmission shouldn`t be overlooked when searching for the root cause.
If your car is having trouble accelerating, it means that the engine is not getting enough power. This can be caused by a number of different things like air intake problems, low fuel pressure, or a clogged fuel system. The MAF sensor may also be dirty or faulty causing the car to slow down.
An abrupt loss of engine power is a somewhat obvious sign of a fuel injector failure. If the fuel injector is clogged, the fuel supply will be irregular too. When the fuel level fluctuates drastically, the high and low rpm`s will cause the engine to move in surges rather than slow and gradual movements.
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.

The fuel pump shut off switch is designed to disengage the power to the fuel pump when a vehicle comes to an instant stop. Most vehicles today have an inertia switch near the main air bag module with a reset button.
Lack Of Fuel

The most common and obvious reason your car may start then die is the fuel shortage in your engine. This happens because there`s not enough fuel in the fuel rail, and there`s no fuel pressure to keep the engine alive. The reason isn`t always you forgetting to fill up your gas tank.

The most common reason is the fuel stopped flowing, most likely due to water and debris in the fuel. I`d start by taking a look at the filters. Follow the procedures for emptying them out and bleeding them to refill them. If that works, you should replace them at your next opportunity.
The most common reason is the fuel stopped flowing, most likely due to water and debris in the fuel. I`d start by taking a look at the filters. Follow the procedures for emptying them out and bleeding them to refill them. If that works, you should replace them at your next opportunity.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

The engine of the car runs, but when I push the gas pedal it does not accelerate, and the engine does not rev.
ANSWER : Hello. It sounds like you may have an issue with your throttle position sensor. This sensor sends a reference voltage to your power-train control module, which uses that to determine ignition timing and fuel trims. If the power-train control module is not detecting the proper signal from the throttle position sensor, the engine may not accelerate properly. It’s probably a good idea for you to have a professional mobile mechanic come to your location and complete a car is slow to accelerate inspection first, so they can pinpoint what is causing this issue to occur and they will recommend the right repairs be completed.

Stop at stop sign, give it the gas, it want go, let up, push down agin it goes,the engine does not die.!!!!
ANSWER : What you are describing sounds like a dirty or failing idle air control valve. The idle air control valve monitors the air intake as it is mixed with fuel prior to being injected into the engine at low speeds and at idle. This valve is controlled by the vehicle’s computer and will adjust idle speed based upon other measurements such as engine temperature, intake air temperature and electrical system load or voltage. This is also an important function when starting the motor as it allows the motor to run and idle on it’s own once the motor fires. When you accelerate, the engine RPM increases, and as you let off the gas, the RPM slowly returns to the normal idling speed with the help of the idle air control valve making the transition from a higher RPM back down to idle speed while adjusting the air/fuel ratio constantly to allow this to happen smoothly. When the engine RPM drops below the normal range of about 800 RPM, this often times will cause the engine to stall indicating a dirty or faulty idle air control valve. I would recommend having an expert from YourMechanic come to your location to diagnose and inspect your vehicle.

Gas cap notification and check engine light came on after getting gas. Car started to sputter and stall out.
ANSWER : Hi there. When the fuel cap is not securely fastened to the tank, it can create vacuum issues inside the tank; which triggers the error code to be stored in the ECU. The error will then trigger the check engine light until that code is reset by a professional digital scanner. If you’re still having sputtering or stalling issues, you should contact a professional mechanic to complete an engine sputtering inspection. This will allow them to diagnose what’s causing this problem and reset any error codes to hopefully correct the issue your Chrysler 300 is experiencing.

Battery died, jumped it, wouldn’t start unless gas was pressed. Once gas was released, engine died.
ANSWER : It sounds like there may be a couple of possibilities here. If the battery died, this may have been a result of leaving the keys on or it may have been a result of the alternator or voltage regulator failing which would cause the battery to die and would also cause the motor to struggle to run if the charging system was not operating at its capacity.

The other possibility may be related to a faulty throttle position sensor. The throttle position sensor monitors the throttle position of the throttle plate inside the throttle body in relation to your foot position on the gas pedal. Based upon the inputs from the sensor reading your foot’s position on the pedal, the ECU then makes the direction to supply more or less fuel to the motor. When this sensor is not working properly, this can cause intermittent responses when pressing the gas pedal.

Another possibility may be a dirty or faulty idle control valve. The idle air control valve monitors the air intake as it is mixed with fuel prior to being injected into the engine at low speeds and at idle. This valve is controlled by the vehicle’s computer and will adjust idle speed based upon other measurements such as engine temperature, intake air temperature and electrical system load or voltage. This is also an important function when starting the motor as it allows the motor to run and idle on it’s own once the motor fires. When you accelerate, the engine RPM increases, and as you let off the gas, the RPM slowly returns to the normal idling speed with the help of the idle air control valve making the transition from a higher RPM back down to idle speed while adjusting the air/fuel ratio constantly to allow this to happen smoothly. When the engine RPM drops below the normal range of about 800 RPM, this often times will cause the engine to stall indicating a dirty or faulty idle air control valve. I would recommend having an expert from YourMechanic come to your location to diagnose and inspect your vehicle.

2006 Ford Mustang. Engine sputters when a/c is on. Dies when lights turn on. new batt/alt installed and still same problem.
ANSWER : This is an engine management issue which is evaluated using a real time scanner during a sputtering diagnostic. In your circumstance, as the engine is loaded (a/c. lighting, etc.) one or more engine controls are not adjusting the air/fuel charge and/or engine speed to keep up with the load. Possibilities include the throttle position sensor, idle air control valve as well as the mass airflow sensor and the manifold absolute pressure (MAP) sensor. There are other possibilities though. If you request the sputtering diagnostic, the responding certified mechanic will get this taken care of for you. If you have further questions or concerns, do not hesitate to re-contact YourMechanic as we are always here to help you.

car runs great when engine is cold but dies when engine is warm
ANSWER : This sounds like there is a problem with the MAF (mass airflow) sensor. When your vehicle is cold, the PCM (Powertrain Control Module) is in what is known as open loop. Open loop is a preprogrammed program put in place for warm up. Closed loop is when the PCM begins using the sensors to adjust fuel ratio. The primary sensor the PCM uses to make decisions is the MAF. I’m leaning toward three possible problems here. The MAF may have been damaged during cleaning, the connector may have a bent pin from disconnecting and reconnecting its connector or the boot that connects the MAF to the throttle body has developed an air leak.

Before condemning the MAF, make sure there isn’t any unmetered air entering the motor after the MAF. This will confuse the PCM and things just won’t work correctly. Unmetered air is what we call it when there is a leak between the MAF and the throttle body.

Of course, make sure the MAF has been plugged in. If it is, disconnect the connector and inspect the pins. It is fairly common for the small electrical pins in all sensors to get bent over when reconnecting their connector.

It is very easy to damage sensors in the area of the throttle body when cleaning it. Carburetor cleaner can damage sensors. The one I am particularly worried about is the IAC valve. These can stick and cause many different idle control issues.

If this isn’t of any help to you, I recommend having a certified technician, such as one from YourMechanic, diagnose your stalling condition for an accurate repair.

Good luck!

Can front wheel drive car engine power rear wheel drive
ANSWER : Anything is possible with enough engineering. The changes you are looking at would take major structural changes and would definitely not be an easy job. You could possibly consult a manufacturing engineer to get more details on how this could actually be carried out and whether it would be feasible.

Car engine turns off and dies when car is put in reverse or drive.
ANSWER : Hello there, many common faults will cause your 2008 Nissan Altima to shut off when put in drive or reverse. The first step in diagnosis is to check the transmission for leaks, and the fluid level and condition. Once the transmission fluid is checked most common faults are the torque converter, Idle air control valve, vacuum leaks, or a wiring harness fault. A qualified Technician such as one from YourMechanic will be able to diagnose your engine shuts off when put in drive and make any repairs required.