vehicles stalls both while driving and idle, will hesitate to start. howvever sometimes starts and runs without issue. P008B

As stated above, issues have continued after changing fuel filter, fuel pump & cleaning intake.

My car has 164000 miles.
My car has an automatic transmission.

Experienced mechanics share their insights in answering this question :
The p008B code that you listed refers to the low pressure fuel system. For some reason the engine control module is receiving a signal that shows high pressure in the system. This could be caused by a failed low pressure fuel system sensor, a bad/corroded connection, a wiring problem, a faulty fuel pump driver, or even a blockage in a fuel line. This particular code is one that is only a starting point for diagnosis and will require further diagnostic testing to identify. When it comes to a situation where a vehicle stalls, this can be caused by a clogged fuel filter, faulty fuel pump, a vacuum leak, or even a failed sensor. It sounds like the two issues you listed may very well be related, but not necessarily. If you need some help further identifying/repairing the problem, contact a certified mechanic, like the mobile mechanics at YourMechanic.com.

How to Identify and Fix Common car Problems ?

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

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.
This may be related to low fuel pressure, faulty or dirty fuel injectors, a faulty or dirty idle air control valve (this relays information about air intake to the computer which makes fuel adjustments), or potentially a faulty fuel pressure regulator or fuel pump.
Can You Drive With A Bad Fuel Rail Pressure Sensor? A bad fuel rail pressure sensor could still work, albeit inefficiently. In most cases, it won`t leave you on the side of the road. However, symptoms of a faulty unit will likely get worse with time to the point where you won`t be able to drive your car.
Some of the most common sensors that lead to engine stalling include the mass airflow sensor (MAF), engine coolant temperature sensor (ECT) and manifold absolute pressure sesnsor (MAP). The idle air control valve (IAC) and exhaust gas recirculation valve (EGR) are also well known for causing engine stalling.
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.
A faulty crankshaft position sensor will be unable to identify the exact piston position, triggering an engine misfire. This causes your car to shut off while driving. A drop in performance, fuel efficiency, rough engine, etc., are some important symptoms of a damaged crankshaft position sensor.
Engines usually stop suddenly only if they suffer from a lack of fuel or sparks . An engine that stops dead without prior warning has probably had a sudden ignition failure – although if it locks solid it`s more likely to have seized.
Test Using a Fuel Pressure Gauge

Accurate diagnosis requires making various electrical checks if the pump is not working to rule out other possibilities such as a blown fuse, bad relay, or wiring fault. In cases where the pump runs, fuel pressure needs to be checked with an accurate fuel pressure gauge.

The most common diagnostic procedures for fuel pumps in the past were analog and hands-on, and most fuel pump-related problems could be solved with a pressure gauge and voltmeter. Today, the scan tool is quickly becoming the most important tool when diagnosing a fuel supply problem.
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).
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.
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.
Stalling. When your transmission doesn`t have enough fluid, you may experience it stalling at red lights or stop signs. Though it should start right back up, taking your car to an auto shop for repair is key as your transmission lines may be leaking and may need to be replaced.
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.
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.
But if the alternator isn`t functioning properly and the battery dies, your car may eventually lose power and stall or completely shut off. So, can your battery die while the car is running? Absolutely. And oftentimes, this issue is caused by a combination of alternator and battery problems.
When a bad module is responsible for an intermittent stalling problem, the engine will usually cold start just fine and run OK for short distances, but stalls after driving more than a few miles or when driving at highway speeds (especially during hot weather). It`s as if somebody suddenly turned off the ignition.
The fuel pressure sensor is one of these sensors, and if it fails then it can significantly decrease your car`s ability to supply its engine with the right amount of fuel. This can lead to symptoms like weak acceleration, difficulty starting the car, stalling, and poor fuel economy.
More often you`ll have a rough or low idle speed, the engine may stall as you lift off the throttle, there will be surging with steady throttle input, or you will hear a knocking or rattling sound from the engine due to excessive fuel pressure.
The fuel pressure sensor is one of these sensors, and if it fails then it can significantly decrease your car`s ability to supply its engine with the right amount of fuel. This can lead to symptoms like weak acceleration, difficulty starting the car, stalling, and poor fuel economy.
Over time a faulty fuel tank pressure sensor will cause low fuel efficiency, trouble starting the vehicle and/or stalling, and eventually keep the vehicle from starting.
Over time a faulty fuel tank pressure sensor will cause low fuel efficiency, trouble starting the vehicle and/or stalling, and eventually keep the vehicle from starting.
You might not have heard the term fuel pressure regulator, but as an imperative component of any EFI system, your vehicle will not operate without it. The fuel pressure regulator sees that the fuel rail builds up enough pressure to support the vehicle`s fuel injector system with the right amount of fuel.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

vehicles stalls both while driving and idle, will hesitate to start. howvever sometimes starts and runs without issue. P008B
ANSWER : The p008B code that you listed refers to the low pressure fuel system. For some reason the engine control module is receiving a signal that shows high pressure in the system. This could be caused by a failed low pressure fuel system sensor, a bad/corroded connection, a wiring problem, a faulty fuel pump driver, or even a blockage in a fuel line. This particular code is one that is only a starting point for diagnosis and will require further diagnostic testing to identify. When it comes to a situation where a vehicle stalls, this can be caused by a clogged fuel filter, faulty fuel pump, a vacuum leak, or even a failed sensor. It sounds like the two issues you listed may very well be related, but not necessarily. If you need some help further identifying/repairing the problem, contact a certified mechanic, like the mobile mechanics at YourMechanic.com.

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.

Fuel pump engages. Batery good, alternator good volts, jump start helps when wont start. Temp does not matter. Intermittent?
ANSWER : Hello. Thank you for writing in. There are several reasons your vehicle may only start when jump starting. The first and most common is a build up of resistance that is causing you to need a boost of voltage to get the engine started. This may be due to poor battery cables, a bad ground connection, a poor starter solenoid, and a couple of other issues. The first thing you want to do is perform a visual inspection of the starting system. Make sure there is no corrosion build up in the battery cables. You can also check the resistance across these wires and make sure you have a solid connection between components. You then want to make sure the starter solenoid is doing its job. It is responsible for taking the small amount of electricity sent by the ignition and turning it into a huge electrical charge that is strong enough to push over the engine with the help of some gear ratios in its favor. Do some more testing, and stick to the basics before assuming its something seriously complicated.

01 mustang v6 running rough at idle and drive. Please help. Replaced a bunch, still can’t figure out issue.
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, turning on AC or engaging the brakes). 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, 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. I would recommend having an expert from YourMechanic come to your location to diagnose and inspect your vehicle.

Vehicle start sometimes sometimes runs, and other time don’t start. Run and shutdown! 2002 Toyota Sequoia
ANSWER : Hello – the first task is to extract problem codes, whether the Check Engine light is on or not. Most auto parts stores will do this for you for free on a "time-available" basis. These will greatly simplify diagnosis. If no codes are evident, checking for spark at the plug will help narrow the problem to ignition or fuel problems. A failing crankshaft position sensor can cause any/all of the problems you are experiencing, but won’t necessarily set a problem code. I recommend a no start inspection performed by a mobile, professional mechanic, such as one from YourMechanic, who will come to your location, diagnose this problem, and give you an accurate assessment of damage and cost estimate for repairs.

Ok car starts and runs fine normal idle but once it gets up to warming temp it’s like it starts to bog and dies.
ANSWER : With the randomness of the codes you are pulling, it is hard to determine what they have in common. When diagnosing mechanical errors like this, keep it simple. Due to the loss of power and stalling issue, I would like you to look at the one component that may have a huge effect over all of theses parts.

The ELD is a unit which measures the amount of power coming from the battery. It allows the alternator to adjust the field, and the amount of power generated by it. If you are experiencing issues with the ELD, which allows the battery and alternator to behave incorrectly, the other electrical components in the vehicle will not work. You may have more than one issue that is all coming to a head at once.

You can test the ELD with a multimeter, but any electrical testing can be dangerous, and we recommend you proceed with caution. If you’re not comfortable with this repair, consider YourMechanic, as one of our mobile technicians can come to your home to diagnose the stalling issue firsthand and help you make the necessary repairs.

Ocassioanl stalling at idle, RPMs fluctuate at idle – 1995 Chevrolet K2500 Suburban
ANSWER : You either have a leaking injector that is dripping fuel after you shut off the engine and causing a flooded engine and will cause the hard start and erratic running conditions. You could also have a fuel pressure regulator or purge valve that is leaking. The fuel pressure regulator will need to be tested with a gauge and the purge valve tested with a vacuum pump and hose to see if it is leaking vapors when the engine is off. The purge valve may be leaking too much vapor and would show up after running and shutting it off or after getting fuel. The excessive vapors will flood the engine and cause the hard start or stall, and rough or high idles. If you would like to have this checked, a qualified pro from YourMechanic can come to your car’s location to diagnose the stalling problem and high idle to ensure proper repair.

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.