Low Idle and stalling when breaking
I previously had low idling issues and replaced the idle air control valve for about a month it was okay and then the problem came back. When it idles it stays at about 750 rpms. Putting it into drive causes the RPM's to lower to about 500 and braking sometimes causes it to stall.
My car has an automatic transmission.
Experienced mechanics share their insights in answering this question :
Hello there, many common faults will cause your 1997 Jeep Grand Cherokee to die when the vehicle comes to a stop and have a low idle. You have done great in replacing the idle air valve as this is a common cause. There are a few other potential faults such as a clogged EGR valve, vacuum leak, MAF sensor, Oxygen sensor, fuel pump, or the torque converter. A qualified Technician such as one from YourMechanic will be able to diagnose your vehicle dies when coming to a stop making any repairs required.
How to Identify and Fix Common car Problems ?
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The most common reasons a Jeep Grand Cherokee engine stalling are the fuel system, the air intake system, or the ignition system.
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.
The most common reason for intermittent engine stalling is a faulty crank shaft position sensor. This sensor relays engine speed to the engine computer. When there is no signal form the sensor the engine stalls. There are other items which can also cause this concern so please don`t just zero in on the cranks sensor.
When you notice your car idling low, suspect three common sources of trouble: Faulty or clogged idle air control valve. Vacuum leaks. Ignition system problems.
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.
Automatics. Automatic vehicles use what`s called a torque converter to manage transmission fluid and keep your engine running while at a stop. If your torque converter fails, the engine can stall 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.
A lack of fuel pressure or fuel volume can easily lead to engine stalling. 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.
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.
The most common reasons a Jeep Wrangler 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 throttle position sensor(tps) may fail causing intermittent drivability…
Lugging your engine, or driving at full throttle in a high gear with low RPM, can result in damage to your engine, especially for small turbocharged engines, known as low speed pre-ignition. By accelerating in a high gear at a low engine RPM, you`re putting your engine at a huge gearing disadvantage.
Bad solenoid may be causing vehicle to stall.
Causes of shut down
Main and thrust bearing low low oil pressure. Thrust bearing high temperature.
Your vehicle may be equipped with an engine idle shutdown system. This system automatically shuts down your engine when it has been idling in P (Park) or N (Neutral) for five minutes (parking brake set) or 15 minutes (parking brake not set).
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.
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.
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 rough idle is one symptom of a clogged fuel filter. Failing Electrical Components: A problem or failure in the ignition system or various electronic components can cause a rough idle. If this is the case, the problem will usually get worse as RPMs increase.
A rough idle is one symptom of a clogged fuel filter. Failing Electrical Components: A problem or failure in the ignition system or various electronic components can cause a rough idle. If this is the case, the problem will usually get worse as RPMs increase.
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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.
Relevant Questions and Answers :
the most relevant questions and answers related to your specific issue
Very low idling during cold start, stalling engine, 2007 Toyota Corolla
ANSWER : The first thing you should do is scan the engine and repair any codes. Have the fuel vapor system checked to make sure you do not have any problems with a leaking purge valve leaking vapor into the intake when the engine is not running and then leaks even more vapor when you start up the vehicle. If system is not leaking, then have the spark plugs replaced after having the throttle plates cleaned and the combustion chamber and valves cleaned. The valves may have some carbon build up on them that will cause low rough idle even stall cold. If you want to have this done, consider YourMechanic, as a certified technician from YourMechanic, can come to your home or office to diagnose the cold start and let you know what should be done.
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After replacing the power steering pump there was a low idle, idle screw is all out, running rich, and idle speed doesn’t change.
ANSWER : Hi there. The engine has a vacuum leak and is causing the engine to stumble down on the idle. Check all of the vacuum hoses and the brake booster for any leaks. The engine is rich for it’s not burning all of the fuel properly and may also have bad spark plugs. If you need further assistance with engine not adjusting the idle, then seek out a professional, such as one from Your Mechanic, to help you.
Read Full Q/A … : Low Idle and stalling when breaking
Low idle problem
ANSWER : Hi there. If the idle control valve is good then the problem is typically caused by a vacuum leak or an issue with the throttle body. I usually check the engine for vacuum leaks first. It may be a vacuum leak in one of the hoses or in the intake manifold. The intake gasket is a common failure.
If there are no vacuum leaks, then I would test the throttle position sensor to make sure it is reading correctly. If it is also reading fine, then I would check the throttle body itself. If the bore or plate is worn then this will occur. If you want to have this low idle problem inspected, consider YourMechanic, as a certified mechanic can come to your home or office to diagnose and repair this.
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Shaking and stalling during low idling
ANSWER : There are no common issues that would cause this problem – especially with the relatively low mileage. I recommend testing the computer for codes causing the stalling you have. If the computer sees the stall, it should set a code and the code can then be diagnosed to find the cause of your stalling. If no codes are received, then you may have a vacuum leak causing the low idle and stalling that a mechanic should be able to find during the diagnosis. If you want to have the issue looked at, get in touch with a certified technician, such as one from YourMechanic. They will be able to diagnose your stalling issue and verify what repairs are needed.
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My car runs rough at idle, stalls at idle, surges, and idles at 40 miles an hour
ANSWER : A number of components or faults can cause your issues. A vacuum leak can cause your issues. Depending on the vehicle, components such as the mass airflow sensor, throttle position sensor, coolant temperature sensor, and a number of others can be the cause. Since randomly replacing parts can get expensive as most electronic components are not returnable once installed, having a certified technician, such as one from YourMechanic, diagnose the stalling/surging is the best place to start.
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My 2003 Mazda Tribute stalls in gear, no power, rough idle, not the plugs, oil fouled black, clean maf and idle air valve
ANSWER : Hello. I would start by scanning the vehicle for codes and checking to see if all of the sensors are reading correctly. If everything looks good then chances are it needs a new computer. I have seen the computers fail on these vehicles over and over again causing the ignition circuits to not work correctly which causes the vehicle to run just like this. If you need to have this looked at, consider YourMechanic, as a certified mechanic can come to you to [diagnose why the vehicle is running like this] https://www.yourmechanic.com/services/car-idle-is-rough-inspection
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High idling, jumping while idling, idle air control valve code
ANSWER : Hi there. This can be caused by the issues that you mentioned or a number of other things. You need to make sure all of the connectors are making good contact. I would then need to know what codes are in the computer to know if this is a circuit issue or not. Most of the time, it is not the circuit but instead a vacuum leak.
If there is a vacuum leak, then the vehicle will act like this and the computer cannot control the idle. Most of the time it is a bad hose or an EGR valve that is stuck open. That is the most common cause for this. I typically remove the EGR to check it to feel the diaphragm on the bottom of it to see if it is moving correctly. If you need to have this repaired, consider YourMechanic, as a certified mechanic can come to your home or office to diagnose and repair your car’s idling issue.
Read Full Q/A … : Low Idle and stalling when breaking
Low Idle and stalling when breaking
ANSWER : Hello there, many common faults will cause your 1997 Jeep Grand Cherokee to die when the vehicle comes to a stop and have a low idle. You have done great in replacing the idle air valve as this is a common cause. There are a few other potential faults such as a clogged EGR valve, vacuum leak, MAF sensor, Oxygen sensor, fuel pump, or the torque converter. A qualified Technician such as one from YourMechanic will be able to diagnose your vehicle dies when coming to a stop making any repairs required.
Read Full Q/A … : Low Idle and stalling when breaking
