Will not stay running.
My problem is my Impala was running fine until one day I was driving and I lost all power (the car stalled). I let it set for about an hour then turned it back on and the check engine light went off and I continued to drive it. The other day (about a week later) the car started stalling on me so I had a local mechanic check it out, He gave me the codes that came up on the O2B computer but couldn't find a physical problem with it. So I went online to fine possible issues with the car and found a lot of times its either or both the MAF sensor or it is the throttle body, The car had a very ru
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It sounds like you may have 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 is controlled by the vehicle’s computer and will adjust idle speed based upon other measurements such as engine temperature, intake air temperature and 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. I would recommend having an expert from YourMechanic come to your location to diagnose and replace your idle air control valve.
How to Identify and Fix Common car Problems ?
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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.
Any unusual shaking or vibrating forces coming from the engine is cause for concern. It could be something as simple as old spark plugs producing an uneven power delivery, it could be something serious like worn or broken engine mounts, or it could be even more serious in the case of internal engine damage.
Typically, the idle speed will be set at a value in the range of 600 to 800 RPM, but the exact value will depend on the number of engine cylinders and whether the vehicle is equipped with a manual or automatic transmission.
A P0122 code is the generic OBD-II code defined as “Throttle Pedal Position Sensor/Switch (TPS) A Circuit Low Input.” This code relates to the vehicle`s Engine Control Module (ECM) and TPS Sensor Circuit A output voltage and is triggered when the voltage falls below the sensor`s anticipated range.
If the car cranks when you turn the key, but the engine won`t start, it could be because fuel isn`t getting to the engine. One potential reason for this could be dirty fuel injectors. Over time, the fuel injector nozzles can become clogged with rust, corrosion or debris.
To maintain vehicle performance, conditions such as A/C, current battery charge or other reasons may cause the engine to automatically restart before you release the brake pedal.
One of the main reasons why your vehicle could be vibrating at idle could be due to worn out spark plugs. When a vehicle`s spark plug is faulty, it can interfere with the air-fuel ratio leading to improperly firing cylinders, resulting in a misfire while idling. Replacing your spark plugs will solve this problem.
If your vehicle is shaking when you are idling at a complete stop, the problem is likely to be damaged or broken motor mounts or transmission mounts. Broken motor or transmission mounts can result in severe motor shaking and should be fixed before causing other serious mechanical problems.
Turn the idle screw to adjust the idle—turn the screw to the left to increase the RPM or to the right to lower it. When you have adjusted the idle—aim for 650 RPM—reconnect the idle air adjustment valve`s electrical connection. Lower the hood and turn your car off.
For regular cars, idle speed is typically between 600 and 1,000 rpm, just enough to keep the engine`s ancillary systems going, but not enough to move the car forward much.
The throttle position sensor (also known as the TPS sensor or Throttle Valve Position sensor) is a part of the electronic throttle control system and is connected to the throttle body and monitors your vehicle`s throttle angle.
Common signs include lacking power when accelerating, rough or slow idle, stalling, inability to shift up, and the Check Engine Light coming on.
The alternator helps to manage the supply of electricity by recharging the battery. When there is a bad alternator, your car will shut off while driving. This primarily happens as it affects the power supply. Alternator issues will make the engine lose power.
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.
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.
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.
Relevant Questions and Answers :
the most relevant questions and answers related to your specific issue
Vehicle started running rough while driving. Now running/idling rough running rich.
Hello. From the symptoms you describe, it would appear that your vehicle is having issues with the oxygen sensors. P0172 is the code for bank 1 being too rich. This can be caused by a wide variety of issues. The other two codes are for the sensors on bank 2, having excessively high voltage.
This may be due to the rich condition, faulty oxygen sensors, or faulty wiring. The black smoke and soot is a result of excessive fuel that is not being properly burned, and exiting the tailpipe as smoke. A few common causes for these symptoms are a bad fuel pump, fuel pressure regulator, or engine management sensor. As engine management systems can sometimes be difficult to diagnose, I would recommend having the rough idling issue inspected by a professional technician.
My fans stay on when I turn my car on and my temperature gauge stays on cool and will not move up even when the car is running
Hey there. This can be caused by a number of things such as low coolant levels, a faulty thermostat, or a failing coolant fan switch.
As you may know, the coolant fan switch helps to maintain the proper coolant temperature by turning on and off at specific temperature thresholds. When this switch is not working properly, this can cause the fans to come on intermittently, all the time or sometimes not at all.
In your case, if they are on continuously, this may not allow the car to reach normal operating temperature as you have noticed. When this happens, you will notice a temperature spike and drop occasionally as the fan comes on and off. I would suggest having an expert from YourMechanic come to your home to diagnose your cooling system and pinpoint any needed repairs.
Vehicles Check Engine light blinks and then stays on, runs rough like on 6 cylinders/misfiring when wet.
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.
01 mustang v6 running rough at idle and drive. Please help. Replaced a bunch, still can’t figure out issue.
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.
My Lexus will not stay running
Hi there. One of the key ingredients needed for an engine to run is fuel. If the fuel pump is disconnected the engine may start briefly with whatever fuel is left in the injectors or rails that drips into the intake manifold. If your vehicle continues to exhibit this concern after reconnecting the fuel pump I suggest having a qualified technician perform an inspection to avoid replacing unnecessary parts. Your Mechanic has several available technicians that can assist you with a car starts and stalls inspection.
Trucks starts up but have to give gas to keep running then dies starts up a second time then it will stay running.
It sounds like you may have 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.
Runs fine for days then acts like running out of gas and then dies and try restart and runs then dies ,when I turn key on you hea
The fuel pump in the fuel tank is designed to have low pressure and high volume to feed the front fuel pump the right amount fuel. The front fuel pump supplies the engine with high pressure to the engine.
When you do not hear the pump run then the fuel pump is bad and should be replaced along with the relay. You should not have to replace the in tank pump if it is running. I’d suggest replacing the fuel filter as well.
I’d suggest getting this inspected by a qualified technician, such as one from YourMechanic, to diagnose your stalling issue and make the necessary repairs.
Car runs better if I unplug fuel injector 8 but makes a ticking noise and runs sluggish if it’s connected 2006 Ford Mustang
Hello – your symptoms suggest a failing injector . It appears to be leaking when it’s plugged in, as well as noisy. Check for problem codes relating to a rich mixture,, although it’s possible that the oxygen sensors for that bank of cylinders is leaning out the other 3 on that side. This would create rough running for sure. That would explain the popping (probably backfiring or misfiring at least on the lean cylinders). I recommend a misfiring 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.