.
I have a 1998 ford ranger(AT) its shifting roughly, when i come to a stop, the truck wants to keep going, and as a result, the truck stalls out.
I have a 1998 ford ranger automatic, its shifting roughly, when i come to a stop, the truck wants to keep going, and as a result, the truck stalls out. Also, when im am traveling forward at slow speeds(35 mph or less) truck seems to not shift down when slowing down, and when i accerlerater the truck is slugish( as if the transmission is in a higher gear)
My car has 145000 miles.
My car has an automatic transmission.
Experienced mechanics share their insights in answering this question :
The torque converter clutch is not releasing as the transmission is shifting. Try pulling the fuse to the torque converter labeled as TCC and see if the symptoms change. If the vehicle stops acting up, then the torque converter clutch solenoid is active and not releasing. If the symptoms are the same, then the torque converter clutch is melted and needs replaced (torque converter replacement). If you need further assistance with your transmission shifting hash and stalling, then seek out a professional, such as one from Your Mechanic, to help you.
How to Identify and Fix Common car Problems ?
Our sources include academic articles, blog posts, and personal essays from experienced mechanics :
Common reasons for this to happen:
Low fuel pressure, dirty or defective fuel injectors, or broken fuel pump: The fuel pump is responsible for transferring fuel from the tank to the engine.
SHUDDERING AND JERKING
When your car jerks while accelerating or decelerating, it may be a possible symptom of a bad torque converter. The damaged lock-up clutch can be a problem when you feel shuddering while moving on a smooth road.
Vehicle Won`t Shift at All
A surefire sign of a failing torque converter is when the vehicle won`t shift into a specific gear at all. If you can`t get it to go into reverse or forward drive won`t engage, then it`s probably something wrong with your torque converter.
Shifting delays are often caused by many things but most commonly due to poor maintenance or high mileage. Transmission fluid, in addition to acting as a coolant, keeps internal seals lubricated to help prevent hardening or wearing out.
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.
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 Vehicle Speed Sensor measures vehicle speed. When it fails the transmission can stop shifting or shift late and harsh. A bad VSS may also inhibit overdrive and the converter clutch.
A damaged fin or bearing in the torque converter can cause hesitation in the transmission shifting, or the transmission to slip out of gear entirely. This is because the engine torque is not being efficiently converted into the hydraulic pressure needed to shift gears within the transmission.
The best thing to do to confirm the problem is to test the torque converter. To test the torque converter, you must step on the pedal to the floor and accelerate your engine for up to five seconds. The reading for the revolutions per minute (RPM) will max out at the stall speed.
Worn fluid can lead to hard shifts
The fluid`s frictional properties play a vital role in ensuring the clutch plates bind together properly and gear shifts occur seamlessly. Over time, the fluid`s frictional properties can degrade, leading to hard, jerky or inconsistent shifts.
Oftentimes, hard shifting can occur when you fail to change transmission fluid at the recommended interval. In the event that your transmission fluid gets low or dirty, your vehicle`s ability to shift could become compromised.
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.
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 you have a newer model car, the reason may be a malfunctioning electronic sensor or an imbalance in the air/fuel mixture. However, for older model cars, it could be the idle speed control actuator, a faulty alternator, or even a dead battery.
Rusting, power failure, irregular pressure, missing equipment, an incorrect amount of voltage or current, dirt stuck in the system and corrosion are some of the possible reasons why a solenoid valve may not properly close or open.
If you keep driving your vehicle with a bad torque converter, the latter will cause considerable damage to the components within your transmission. You will spend a lot of money fixing those issues and still fix or replace the damaged or bad torque converter.
Fortunately, however, torque converters can be repaired. The repair of the torque converter requires quite a lot of special equipment for cutting it off, measuring, assembling, gluing clutch discs, welding, quality control, and so on.
Specially tuned for truck customers, Auto Start-Stop shuts off the engine when the vehicle is at a stop – except when towing or in four-wheel-drive mode – to give drivers power on demand when they need it most. When the brake is released, the engine restarts quickly.
Low or high fuel pressure from a dirty fuel filter, defective fuel pump, clogged fuel tank strainer, bad fuel regulator or dirty/clogged fuel injectors can cause rough idling. Try replacing the fuel filter and add fuel injector cleaning treatment to your fuel tank to clean and hopefully unclog your injectors.
Specially tuned for truck customers, Auto Start-Stop shuts off the engine when the vehicle is at a stop – except when towing or in four-wheel-drive mode – to give drivers power on demand when they need it most. When the brake is released, the engine restarts quickly.
There is a simple answer to this and again it is to do with the clutch pedal. To avoid stalling when slowing down, push the clutch pedal down completely, just before your vehicle becomes stationary. Failure to do so will result in the car stalling.
Low or high fuel pressure from a dirty fuel filter, defective fuel pump, clogged fuel tank strainer, bad fuel regulator or dirty/clogged fuel injectors can cause rough idling. Try replacing the fuel filter and add fuel injector cleaning treatment to your fuel tank to clean and hopefully unclog your injectors.
Relevant Questions and Answers :
the most relevant questions and answers related to your specific issue
I have a 1998 ford ranger(AT) its shifting roughly, when i come to a stop, the truck wants to keep going, and as a result, the truck stalls out.
ANSWER : The torque converter clutch is not releasing as the transmission is shifting. Try pulling the fuse to the torque converter labeled as TCC and see if the symptoms change. If the vehicle stops acting up, then the torque converter clutch solenoid is active and not releasing. If the symptoms are the same, then the torque converter clutch is melted and needs replaced (torque converter replacement). If you need further assistance with your transmission shifting hash and stalling, then seek out a professional, such as one from Your Mechanic, to help you.
My car idles kinda rough, and it stalls when I come to complete stop and stalls when I let it run.
ANSWER : Failures in the charging circuit (alternator, etc.) do not typically cause a rough idle. A faulty throttle position sensor and/or clogged fuel injectors can cause the engine to run roughly but those are just two among many, many potential causes of a rough running engine. What will help you is a rough idle diagnostic during which the individual cylinder firing patterns can be evaluated on a scope. Those firing patterns will allow the mechanic to see if perhaps there is "a" or a couple bad cylinders and also whether the engine is experiencing a fuel system versus ignition system problem and in which cylinders. On an engine with so many miles, 240,000 in your case, compression should be tested in each cylinder as wear in the engine could potentially cause enough imbalance, from cylinder to cylinder, to cause the engine to run roughly. You have to keep in mind that typically there will be multiple issues with an old engine, for example you could have dirty fuel injectors, a sticky EGR valve and fouled plugs due to the inevitable leakage from old valve stem oil seals, or any of a number of other combinations. The best thing to do, to see if you can get additional service life out of the engine, and you likely can, is to methodically and carefully go through the list of possibilities. YourMechanic certified technicians specialize in just that so if you set up a diagnostic, a technician will get to the bottom of this for you and give you repair options so that the engine can be restored to reasonable operating condition.
When the stop engine oil low light keep coming on I put oil in the car why does it keep coming on
ANSWER : Hi there. From the description you have provided, your vehicle’s low oil light comes on when the engine is stopped; this may not be a low oil level. It is very important to not overfill the engine with oil. Always check the level using the dipstick before adding oil. The best time to check the level is at operating temperature, engine off, on level ground, and after the car has sat for at least 5 minutes allowing oil to return to the oil pan. The level should be between ’add’ and ’full’ on the dipstick (1 qt range). This could be a symptom of a faulty oil level sensor. It could be a poor electrical connection at the oil level sensor. It could also be a fault in the IPC (instrument panel cluster). I recommend having your vehicle’s oil low light keeps coming on diagnosed and repaired by a certified technician, such as one from YourMechanic.
Around 2000 rpm, car shifts erratically from 4 to 3 gear, code comes up as Bad Shift Solenoid C
ANSWER : Hi there, thanks for writing in. Based off your details, you could possibly have a problem with the transmission front pump seal that will not let the lock up torque converter go into overdrive, and may set codes for overdrive. The possible code is P0628 or P0741. I recommend having the front pump seal inspected, and if it’s damaged, replace front pump and converter.
If you’d like help with this issue, consider having one of our certified mechanics come to your home or office to inspect and diagnose this issue for you.
Shifting from 2nd to 3rd, car stopped going fast. Now it won’t go at all.
ANSWER : It is possible that your clutch has failed. The sound you are hearing is likely due to the clutch not engaging with the engine due to it being worn. I would recommened having your transmission inspected by a qualified transmission expert to determine if your clutch requires replacement in order to resolve this issue. This inspection may require removal and partial disassembly of the transmission in order to verify that the clutch has failed.
Stop at stop sign, give it the gas, it want go, let up, push down agin it goes,the engine does not die.!!!!
ANSWER : What you are describing sounds like 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.
Car doesn’t want to stop when brakes are pressed, has an odor, and feels like it wants to power off on me.
ANSWER : Hello.
From what you describe it would appear that some sort of serious issue may have occurred that is greatly affecting engine performance. A few common reasons why a car would not want to go over 45 mph is due to problems with the fuel, ignition, or engine management systems. Smoke from the engine is usually a result of fluid leaks. It may be possible that oil, power steering, or even brake fluid are leaking and have made contact with a hot engine component, producing smoke. You mention that the car did not want to stop, or had trouble stopping – this could be related to the smoke if there is a brake fluid leak present. I would recommend having a professional technician look at the vehicle, as the possibilities could be many.
Regards,
Eduardo
YourMechanic
Leaving stop light car runs high rpms 5000-6000 and doesn’t want to go over 20 mph 2009 Chevy Traverse
ANSWER : Hi there – first thing to check is the transmission fluid level – low fluid levels can cause lots of problems like this – your transmission is obviously slipping badly. If the fluid is at a correct level, and doesn’t smell burned, you may well have burned out clutches in the transmission, or solenoid or valve problems in the valve body of the transmission. The problem codes reviewed by your mechanic should have helped guide the diagnosis. I would recommend a 2nd opinion transmission inspection by a mobile, professional mechanic, such as one from YourMechanic, who will come to your location, diagnose this problem, give you an accurate assessment of damage and cost estimate for repairs.
