Engine won’t stay running.

I tried to pass a truck on the interstate. When I hit the gas the car bogged down. After that, the car ran fine at cruising speed but hesitated when I accelerated. Then it started dying. I can crank it but it won't stay running unless I pump the gas. I've replaced the spark plugs, wires and ignition coils. I think it may be the catalytic converter or the fuel pump. I tested the fuel pressure. It reads 48 lb psi. The spec for my engine is between 53 and 58 lb psi. The car is not throwing any codes. I have not replaced any sensors (IAC, MAF, TPS, etc) nor have I replaced the in
Experienced mechanics share their insights in answering this question :
There happens to be two different fuel pressure specs depending on your VIN number if it has a 1 or a K for the 8th digit. The spec for the 1 is 48 to 54 psi and if yours is a K then it is 53 to 59 psi. If yours is a K then the low pressure may be the issue and replacing the fuel pump may repair the problem. Try disconnecting the fuel pressure regulator at idle to see what the pressure goes up to? If the pressure goes to 54 psi then I think your pressure is okay and need to remove and check the fuel filter for blockage and replace it and see if problem goes away. If the problem still exists after this, then I suggest having a qualified technician, such as one available from YourMechanic, diagnose your running issue.

How to Identify and Fix Common car Problems ?

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

The most common reasons a Buick Regal 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.
The most common reasons a Buick Regal won`t start are a dead battery, an alternator problem, or failed starter.
On a Series II 3800 engine, fuel pressure should be 48 to 55 psi with the key on and engine off. GM does not provide a fuel volume test spec but, as a rule, a good pump should deliver about a quart of fuel in 30 seconds.
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.
A classic reason why your car starts for a second then dies is battery depletion. The car needs electricity from the battery to start. However, if your car starts then dies immediately, then the fault could be a lack of charging or damaged battery.
Bad Sensors

One common culprit for this problem is the crankshaft position sensor, which measures the position and speed of the crankshaft. The computer uses the information from this sensor to know when to fire the spark plugs. If the sensor isn`t working, the spark plugs won`t fire, keeping the engine from starting.

Problem Description. If the engine cranks but does not start, or starts and stalls, the fuses should be inspected, especially the power door locks fuse. The power door lock fuse provides power to a module that sends the Powertrain Control Module (PCM) the “OK to start” signal.
Fuel pressure for most vehicles should stay in a 5- to 10-psi range. But, techs should make sure to look at the service information for the specifications. Other data PIDs used to regulate the fuel pump include the engine position sensors.
Faulty fuel/system or pump –engine cut out can be fuel issues, such as a blocked fuel filter or fuel pump failure. Empty fuel tank/faulty fuel gauge – this seems obvious but sometimes if the fuel gauge is faulty you may have no idea that you are low on fuel.

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.

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Honda Pilot engine misfire when cold out and engine running warmer than usual?
ANSWER : Hi There,
It sounds like you may have a faulty coolant temperature sensor. This sensor relays the temperature of the coolant back to the ECM which uses this information to control many things such as when to turn the coolant fans on and off as well as how much to adjust the air to fuel ratio in the motor. Both of these functions are affected when this sensor is not working properly. If the senor is reading incorrectly, this may cause inaccurate temperatures to be read, thus causing inaccurate adjustments to be made to fuel and to the operation of the cooling fans (i.e. staying on too long or not coming on soon enough to help keep the motor cool). I would recommend having a professional from YourMechanic come to your location to diagnose and inspect your vehicle.

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I have a 96 Ford ranger with cel p0340 I have recently done a timing belt, engine runs great replaced cmp sensor cel still on
ANSWER : Hi There,
This may happen for a couple of reasons. First, check to be sure that the connections to the sensor are clean and not faulty or broken. Secondly, check to be sure you replaced the correct sensor as there are two camshaft position sensors in some applications. If you need further help with this, please reach out to us here at YourMechanic as we are always here to help.

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Truck won’t stay running no check engine codes
ANSWER : You should first identify if the vehicle has California emissions or not. The difference is one will have a mass air sensor in the air cleaner and the other will have a MAP sensor mounted on the a/c evaporator case with a vacuum line and connector on it. If you see what one you have an disconnect either one and see if vehicle will start and run better. It will not run perfect but better if you have a bad sensor. If it runs better then replace sensor and road test to recheck system. If you have a scanner you can scan and retest for codes.

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Vehicles Check Engine light blinks and then stays on, runs rough like on 6 cylinders/misfiring when wet.
ANSWER : Hi there. Check the spark plugs and see if they are sparking. Get a code reader and check for any codes that could be stored in the computer as the check engine light is on. The code will give you a starting point for diagnostics. I recommend replacing the spark plugs and plug wires if they are more than 80,000 miles or 5 years old. If the spark plugs are working good, then check the fuel injectors and see if they are working by removing the harness to each injector one at a time. If the engine stumbles more than normal, then the injector is working. I recommend seeking out a professional, such as one from Your Mechanic, to help you diagnose a misfire if you need further assistance.

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Reduce engine power / check engine light is on
ANSWER : Hi there. Most of the time, reduced engine power is caused by a restriction of fuel, or the throttle body’s inability to efficiently mix air and fuel. This could be caused by a failing mass air flow sensor, EGR valve or other fuel system components. Since the check engine light is on, you should have a professional mechanic complete an inspection at your location to determine what codes are stored and which components require repair. This should resolve your issue.

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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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Audi A4 engine not running smooth
ANSWER : The first thing would be to check the throttle body to see if it is really black from oil? If it is then you may have leaking oil seals in the turbo causing you to burn oil. This may also make your engine run rough without causing the engine misfire codes. Check your plugs and replace them if they are worn, black or have oil fouling from burning oil. If you still have issues then the coils may need to be replaced since they are common to get weak and cause rough running without a total misfire. If you still need help diagnosing why your engine is running rough have a certified mechanic, like one from YourMechanic, come help you out.

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