Stalling while driving

So, my situation is that I bought a 2002 Nissan Altima. Almost immediately, I started to have various issues. Almost everything on that car, including a new engine AND block, as well as a new mass airflow sensor (and a new airflow manifold to go along), two new cat convertors, new spark plugs, new radiator and fan, almost everything. Now my issue is that the car idles really low, with very low RPMs, and often stalls, including while driving. This happened, so I got my catalytic convertor replaced AGAIN, on my mechanic's suggestion, and within a few hours it happened again. My check engine
Experienced mechanics share their insights in answering this question :
Hi Jacob:

Sometimes spending a few dollars to have a professional mobile mechanic complete a car is hard to start inspection is the best way to properly diagnose why a vehicle is having issues like you’ve described. However, it’s very common for multiple components to be faulty or damaged, meaning when you replace one that might be an issue, another part is also faulty. Before you spend another dollar on replacement parts, I’d recommend that you have a mobile mechanic complete a car starts then stalls inspection.

How to Identify and Fix Common car Problems ?

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The most common reasons a Nissan Altima 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.
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.
The most common sensor which can lead to your car stalling is the manifold absolute pressure sensor (MAP) or the mass air flow sensor (MAF). Most cars typically have one or the other.
Immediately turn on the vehicle`s hazard warning lights. They`re the universal sign of distress. If you`re unable to pull completely over onto the shoulder, or if the car is stalled in a traffic lane, do not attempt to get out of the car! Similarly, never try to cross a highway on foot.
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.
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.
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.
Automatic transmission vehicles need to manage their level and pressure of transmission fluid when the car is idling. They do this with a component called a torque converter. When this converter fails, your engine will stall.
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.
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.
Bad solenoid may be causing vehicle to stall.
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.
A clogged fuel filter causes low fuel pressure that results in a lean fuel condition and engine misfire. This can result in poor fuel mileage, rough idling and possibly cause the check engine light to come on. Once that light is on, it`s time for a trip to the repair shop.
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.
In most cases, this will occur due to an obstruction of fuel or the inability to correctly mix the right ratio of fuel to oxygen. This could be due to dirty or clogged fuel injectors, throttle body or a mass air flow senor or idle control valve that is faulty or needs to be cleaned.
Stalling most often occurs because of a problem with the air to fuel ratio inside of the vehicle`s engine. Leaky air intake tubes, a dirty air filter, or various other airflow issues can potentially disrupt the air to fuel ratio and cause the vehicle`s engine to stall.
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.
The signal from the coolant temperature sensor tells the engine`s computer when to apply extra gasoline during a cold start. A faulty sensor can confuse the computer, keeping it from providing enough fuel. As a result, the engine may hesitate or stall.
Another symptom commonly associated with a problematic crankshaft position sensor is intermittent stalling. If the crankshaft position sensor or its wiring have any issues, it can cause the crankshaft signal to be cut off while the engine is running, which can cause the engine to stall.
This sensor controls ignition timing of the engine and when it fails the computer does not know when to ignite the cylinder causing the engine to stall and not start correctly. I would recommend having a technician from YourMechanic come out and replace the sensor.
Your Vehicle is Stalling and Sputtering

Rough running can also happen as a result of a faulty fuel pressure regulator. There are some cases where you will not be able to start the engine at all.

Number 1 – Bad Battery

A bad battery is one of the most common reasons that cars stall. Most people think that if a battery is dead, the car won`t start. Truth is, if your battery is going bad,your car will run but you`re at risk of stalling out.

Stalling is caused by a loss of air, fuel, or electricity while the engine is running. By identifying the problem yourself, you may be able to repair it, or at least know what type of repairs you`ll need to pursue. As frustrating as a stalling car can be, fixing it can actually be pretty easy.
A lot of stalls are caused by releasing the clutch too quickly, or by forgetting to apply the clutch when you`re slowing to a stop. This is why stalling is most likely to occur when you`re in a queue of traffic, when you`re waiting to join a roundabout, and when you`re attempting a hill start.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

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.

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Truck stalls when shifting into drive from park or reverse
ANSWER : Hi there. The vehicle running great, once past the initial stall, leads me away from a fuel delivery concern. The stalling issue may be, the minimum airflow rate is not properly set. This could be the result of a dirty or worn throttle body. Cleaning and/or making an adjustment to the throttle body may correct the problem. Engine running at idle, plug the IAC passage, and the RPM (revolutions per minute) should be at or near 400 rpm. A vacuum leak present could also cause the engine idle to be improperly controlled and needs to be identified before any adjustments are made. I recommend having your vehicle’s stalling issue be diagnosed and repaired by a certified technician, such as one from YourMechanic.

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My car is briefly shutting off when driving and stalling out when stopped.
ANSWER : Hello. Stalling issues can arise from a variety of faults. Have any warning lights come on? You may want to have the vehicle scanned for codes anyway. Typically you turn to the fuel and spark first to make sure they are working correctly first. You can hook up an inline fuel gauge to make sure you are getting the proper amount of fuel to the engine. This needs to be placed after the fuel filter to test that as well. You can test the spark plug wires to make sure the plugs are receiving a strong enough signal. You may also want to pull the plugs and make sure they are not fouled and are gapped correctly. Several sensors may also be failing, but those should show up on a diagnostic scan. With an issue like this, start with the easiest components to test and work your way through the possibilities until you find the fault.

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Could this cause ur car to stall in warmer weather? My car never stalls during winter months. But from spring on its a neverendin
ANSWER : You should have the check engine light and engine scanned to see if the engine may be running lean due to low fuel pressures or clogged injectors. You should also have the mass airflow sensor cleaned and checked for proper readings and replace if not within specifications. The vehicle runs richer in colder weather and may be the reason for not stalling. You should clean injectors, clean throttle body and idle control valve then clean mass air sensor and relearn idle.

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After driving awhile, when idling, RPM drops below 500 & car stalls. Happens rarely but RPM fluctuates, and drops suddenly.
ANSWER : If you are having a stalling problem then you may have a computer code stored in memory. I suggest having the computer scanned to see if there is any codes stored and diagnose them as needed. The intake hose and air filter should be inspected for leaks in the hoses and dirty or leaking air filters. If the air filter is dirty or leaking then have the mass air sensor cleaned. If you still need help, have a mechanic diagnose the stalling issue for you and let you know exactly what repairs should be done.

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My vehicle stalls while driving and has trouble restarting – 1993 Jeep Wrangler
ANSWER : This problem may involve the heavy duty test tools, such as an oscilloscope, but it seems likely that the ignition control module has all but completely failed. It lives in/on the distributor – a hot place with a lot of vibration. Testing the spark path from trigger to spark plug is needed: from the magnetic pickup in the distributor to the ignition control module to the cap & rotor, plug wires, and then the plugs themselves.

I would recommend having a mobile, professional mechanic, such as one from YourMechanic, perform an inspection to determine why the car is starting and dying and give an accurate assessment of the damage and cost estimate for repairs.

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Car stalls out while driving.. Power gone..battery drained.. dashboard goes crazy.. Told alt..or ignition stuff.won’t start…
ANSWER : The alternator is likely, but this would completely drain the battery and if done too many times can render the battery useless. The situation must be diagnosed properly by an experienced mechanic to find the solution. Electrical components like the ignition switch or an engine speed sensor can also cause the vehicle to stall. but do not usually drain the battery. I’d suggest having one of our mobile experts pay a visit and assess the concern with your battery.

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Why the car stalls when put on Drive?
ANSWER : This may be a sign of a faulty MAP sensor as the vehicle responds adversely to a load put on the motor (i.e. putting it in gear) as you describe. The Manifold Absolute Pressure (MAP) sensor senses engine load and generates a signal that is proportional to the amount of vacuum in the intake manifold. The engine computer then uses this information to adjust ignition timing and fuel enrichment. When the engine is working hard, intake vacuum drops as the throttle opens wide. The engine takes in more air, which requires more fuel to keep the air/fuel ratio in balance. When the computer reads a heavy load signal from the [MAP sensor]((https://www.yourmechanic.com/services/manifold-absolute-pressure-sensor-map-sensor-replacement), it adjusts the fuel mixture to slightly more rich than normal so the engine can produce more power. The computer will then retard (back off) ignition timing slightly to prevent detonation that can damage the engine and decrease performance. This may also be caused by other closely related components such as a dirty or failing mass air-flow sensor, a faulty throttle position sensor or potentially a vacuum leak.

Blue smoke coming from your exhaust generally means that the motor is burning the engine oil. This can happen for a couple of different reasons such as worn piston rings or leaking valve guide seals. When this happens, the engine oil is burned in the combustion chamber along with the fuel which is what generates the blue smoke coming from the exhaust.

I would recommend having an expert from YourMechanic come to your location to diagnose and inspect your vehicle.

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