Two weeks ago I went to pull away from a stop sign and the car hesitated to accelerate. That only lasted a day or two and then it went back to driving fine. Then just this past Sunday I jumped on the interstate and my cars rpms were almost into the red zone, so I backed off the gas and got off at the first exit. I pulled into a gas station shut car off and proceeded to take back roads home. I noticed the car would shift into 2nd hard and not want to shift into 3rd but would occasionally but once it would the car would rev on its own. Well I took the car to a shop and they told me it was a litt
Hi there – first task is to be sure the transmission fluid is at the proper level, and in good condition (more pink than black, and no burned smell). Low fluid, or dirty fluid, can cause lots of unexpected transmission behavior. The second task is to check for problem codes, whether the Check Engine light is illuminated or not. The possible problem we’re looking for here is a failing throttle position sensor – which interacts with the transmission controller and affects shifting behavior. I recommend a transmission 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.
How to Identify and Fix Common car Problems ?
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The main problem of revving high is the clutch slipping and the clutch needing replacement. As with the problem with the hoses collapsing, if it is a coolant hose, then the radiator cap vent is bad and the cap needs replaced. If the hose is something else, then it should be looked at by a mechanic to diagnose.
Transmission Fluid Low or Poor Condition – Vehicles low on transmission fluid or that are operating with worn out or contaminated fluid are likely to experience hard shift conditions. Lack of adequate lubrication within the transmission can cause several problems, including hard shifting.
This can happen due to a stuck throttle cable, a malfunctioning throttle position sensor (TPS), or a sticky throttle body.
2010 Chevrolet Cobalt transmission problems could include shifting delays, grinding or jumping during acceleration, the car shaking at any speed, or whistling noises or a burning smell coming from beneath the hood.
When a cars rpm goes up and the car is not picking up speed, this usually means that there is a problem inside the transmission. The valve body, shift solenoids, and or clutches of the transmission probably had gone bad or are worn out to the point they are causing a transmission shifting issue.
If you notice a large delay between going into gear or between shifting gears where your engine is revving really high before it shifts, it may point to several problems with your transmission: Transmission Solenoid problems. Engine problems. Low or dirty fluid.
If the throttle sensor or TPS is broken, your car can start to accelerate on its own. As you can guess, it results in higher RPM. Other than that, you may also experience misfires or will have trouble turning the engine on.
This can be caused by a variety of things, including low transmission fluid levels, worn-out clutch pads, or a problem with the torque converter. Another possible cause of over revving is an issue with the engine itself. This could be something as simple as a dirty air filter or spark plugs that need to be replaced.
The most common cause of this revving is either a stuck throttle or the mass airflow (MAF) sensor. This fault should be addressed as soon as possible for normal operation as this revving can become dangerous if the vehicle is allowed to accelerate unintentionally.
If your car is hesitating around 3,000 RPM you could be dealing with a fuel or air delivery issue that could cause damage in the long run. The best thing you can do is bring your car to a mechanic and let them diagnose the problem and repair it.
Therefore, a failing speed sensor will have a direct impact on automatic transmission operation. One of the most common signs of a bad speed sensor is abnormal automatic transmission operation. If the VSS is faulty, the transmission may exhibit symptoms such as delayed shifts, hard shifts, and limited gear operation.
Some common symptoms of a failing transmission include unusual noises, slipping, grinding, and jerking when engaging and shifting gears. A failing transmission can lead to various issues ranging from your vehicle making loud noises, behaving erratically on the road, or being undrivable.
As you accelerate, your car`s engine is receiving a much higher dose of fuel than when at idle and conversely, when you let off the gas pedal, there is a sudden change in this fuel supply as a result of your foot letting off the pedal.
If the RPMs are too high, try dropping it down a gear. This can solve the problem quickly and easily. Depending on what equipment the engine is hooked up to, you may be able to control the RPMs with gears. If the RPMs are too high, try dropping it down a gear.
Worn Transmission Fluid (Automatic Transmission)
Over time, the transmission fluid gathers dirt and grime. This can cause the engine to run roughly, stall or fail to accelerate when you press down on the gas pedal. You may need to have a transmission fluid change before more damage is done.
Because the TP sensor is an input to the control module for various automatic transmission functions (e.g., shift points and torque converter clutch operation), a problem with the sensor can cause transmission performance issues. For example, you might experience harsh or delayed shifting.
When a MAF sensor malfunctions, it can do so in a very subtle way. It can create an erratic or incorrect signal on initial take-off, which can cause an elongated shift. It can deliver an incorrect signal at higher engine speed, which can create shudder that could be mistaken for torque-converter-clutch (TCC) problems.
Among the potential underlying causes are vacuum leaks, EGR system malfunctions, malfunctioning oxygen sensors, dirty fuel injectors, fuel pump malfunction, faulty spark plugs, a faulty mass airflow sensor, or a faulty throttle position sensor.
The engine`s oxygen sensor will detect the extra oxygen entering the engine via the vacuum leak which will alert the engine`s computer that the exhaust is running lean, which will prompt the computer to pump in additional fuel, resulting in an abnormally high idle.
Generally speaking, this is usually caused by ignition system problems – mostly voltage related. A worn out spark plug can cause this, as can a weak ignition coil, a bad ignition wire (for cars that have these), low primary voltage are a few causes. Other causes can be low fuel pressure and/or worn injectors.
The idle problem may be a result of a dirty or faulty 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 rotational speed allows the engine to generate enough power to operate vital components without turning off. The idle speed should feel consistent without skipping or slipping. In most of today`s cars, an idle speed of 600 to 1000 RPMs is average.
The ECM doesn`t control the transmission on a stick shift, so if you`re having problems with your five-speed, it`s the transmission. If you`ve done numerous repairs on the transmission and replaced your automatic transmission fluid and you`re still having problems, the ECM could be at the root of your problems.