I have replaced the EGR valve, the oxygen sensor, and the alternator. Once I replaced the alternator, it stopped cutting off while driving. Now, it only cuts off when I'm slowing down or when the car is idle. When it did this a little under a year ago, they said it was my harmonic balancer. It was shaking violently to the point that it wasn't triggering the crank shaft sensor. They replaced the harmonic balancer and it worked fine until about a month ago when it started shutting off again. They threw me code after code and I fixed all of them to be point that no codes are thrown. And i
Hello, thanks for writing in. This can be caused by a number of things. From the symptoms that you have though I would start by checking the throttle body. If it is very dirty then the throttle plate may be sticking which will cause this to occur. If the throttle body is clean then I usually check the idle control valve to see if it is functioning as designed. If that is fine also then it may be a bad crank sensor. These will fail and act like this. A scan tool would be needed to watch the signal when this occurs to see if it is bad. If you would like help, consider having an expert automotive technician from YourMechanic come to your home or office to inspect and diagnose this issue for you, and make or suggest any repairs as needed.
How to Identify and Fix Common car Problems ?
Our sources include academic articles, blog posts, and personal essays from experienced mechanics :
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.
If your car stalls when braking, then it usually means you have a vacuum hose blockage in the brake booster or a leaking master cylinder. Or you could have a leak in the ABS system. In either case, this can be difficult to track down without professional help.
The most common reasons a Pontiac Grand Prix engine stalling are the fuel system, the air intake system, or the ignition system. Search our network of RepairPal Certified shops near you to speak with a technician about your issue.
If the torque converter is broken, or if there is a low fluid level in the transmission, the converter will not do its job, and the car will be unable to maintain power at low speeds, which causes the engine to shut off. A defective TCS or torque converter solenoid can also cause this issue.
Malfunctioning spark plugs can make an engine stop for a while and resume its normal functioning. It can happen when you are driving. The engine can also sound rough when idle. The misfires affect the proper functioning of your car`s engine due to failing spark plugs that have no power to ignite the fuel-air mixture.
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.
When your vehicle splutters and eventually stalls it could be a sign that your car needs new spark plugs. The spark plugs, while small, are a critical part of your engine and are what “spark” air and fuel mixture in the engine sending power through your vehicle.
Sterling, Virginia — Have you noticed that your car slows down when you let off the gas pedal even before you hit the brakes? Part of the reason you slow down when you lift your foot is because your engine is no longer receiving the fuel it needs to maintain its speed.
The most common reason your car starts then dies immediately is because of a lack of fuel in the engine. This often happens because there is a small amount of fuel in the fuel rail, which helps to start the engine. However, there is no fuel pressure to keep the engine running.
Faulty spark plugs can cause the car to exhibit starting troubles. Worn out plugs does not produce sufficient sparks, which is needed for starting the engine. This results in the engine to stall and fail to start quickly.
Engine stalls are a common sign that your air/fuel mixture is off or your spark plugs need replacement. The stall can also be caused by faulty spark plug wires.
A failing camshaft position sensor begins losing its ability to quickly transfer data. Mismatched fuel delivery and ignition timing, even if off by a few milliseconds, will cause your vehicle to sputter, accelerate poorly, lack power, stall or even shut off.
When the EGR valve is clogged or dirty, as they are prone to, it may not function properly causing the engine idle rough, stall at idle speeds, cause the car to get poor fuel mileage, or emit a strong smell of fuel due to excess hydrocarbons which also results in failing emissions tests.
Will a bad O2 sensor cause rough idle and loss of engine power? You bet. Moreover, you may also notice poor acceleration, engine misfires, and even stalling. Bad oxygen sensors disrupt all kinds of essential engine functions, including engine timing, combustion intervals, and air-fuel ratio.
If the engine stalls while idling or driving, the engine may be running out of fuel or not receiving enough fuel pressure to keep it running. The most likely cause of this kind of stalling would be a fuel pump that is not spinning fast enough or is intermittently cutting out.
There are 3 main types of stalls that pilots train for; Power-Off, Power-On and Accelerated. Learning how to recognize, prevent and recover from each type of stall is an important part of learning to fly.
It is commonly applied to the phenomenon whereby an engine abruptly ceases operating and stops turning. It might be due to not getting enough air, energy, fuel, or electric spark, fuel starvation, a mechanical failure, or in response to a sudden increase in engine load.
Stalling the engine in a manual car is NOT bad for the vehicle, so long as it`s not done 8 or 10 times every day.
Common faults are the battery, alternator, fuel pump, fuel filter, battery cable, coil, or a wiring harness fault.
Common culprits include a faulty fuel pump or fuel pump relay. A clogged fuel filter or bad fuel pressure regulator is also common on return-type fuel systems. Another often overlooked problem is the vehicle simply being out of fuel. Sometimes the fuel gauge breaks or is inaccurate.
Both spark plugs and ignition coils generally begin to lose power when nearing their service life. However in some instances it is possible for two or more ignition coils to go bad. This would significantly reduce the combustion output and possibly cause the vehicle to stall out.
Loss of spark is caused by anything that prevents coil voltage from jumping the electrode gap at the end of the spark plug. This includes worn, fouled or damaged spark plugs, bad plug wires or a cracked distributor cap.
If you are running on a faulty car battery, you are at risk of stalling on the highway. Having your vehicle stall in the middle of the road can be embarrassing and inconveniencing, and in case you don`t have jumper cables, you risk finding yourself stranded in the middle of nowhere.