Car shudders in gas pedal and steering wheel, higher than 60 mph

I had new tires put on my car recently. After that, my car started shuddering in gas pedal. Then, the steering wheel would start shaking. It occasionally moves to the seat of the car.The car shaking occurs at higher speeds, over 60 mph. I had these new tires replaced once again. They put another set, thinking the first ones were defective perhaps. It didn't solve the issue. The tires were balanced several times by different mechanics. Do you have any idea what can cause this shaking? Thanks.
Experienced mechanics share their insights in answering this question :
If you did not have any issue before the tires were put on and now the problem has appeared, than this indicates that there is tire problems. I would recommend having the tire store put a different brand of tires on and see if the problem goes away. The tire store may have gotten a bad batch of tires. If they put the new set on and the problem still exist, then I would start looking to see if they maybe are not seating the wheels on the vehicle correctly or the rims are bent. If the tire balance machine is not calibrated, it can cause this problem too. Have another tire store check the balance with their machine and see if the tires were out of balance.

How to Identify and Fix Common car Problems ?

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Tire Issues

Your steering wheel may be shaking if your tires are out of balance. Drivers normally notice shaking around 50-55 mph, but this can happen sooner, for instance, if your front tires are losing air or sustaining breaks and cracks. Many of our customers report shaking gets worse around 60 mph.

Why is there a vibration in my gas pedal? Gas pedal vibrations can arise due to faults associated with axles, wheel bearings, driveshaft, calipers, and motor mounts. A visual inspection for physical damage can help you identify the problem in most cases.
Tire Problems

Tires are one of the most common causes of car vibrations. One of the possible issues are out-of-balance tires. Your problems may not be noticeable at slow speeds, but the shaking will intensify as you accelerate to 55-60 miles per hour. The steering wheel, or even the entire car, will start to vibrate.

Tyre balance

A common cause of steering wheel vibration, this is usually felt at higher speeds, and becomes progressively worse the faster the vehicle gets. On a positive note, it is also relatively easy to fix. Simply perform a wheel balance and check each tyre for any damage and wear.

The steering wheel of your vehicle will begin to shake if your tires are out of balance. You will begin to notice that it starts shaking at 50-55 mph. It may be okay at a lower or higher mph, but make sure to get those tires balanced as soon as possible for your tires` sake.
The most likely cause of the shuddering most often happens in the vicinity of your car`s rims and tires. They plant your car to the road, and if anything is broken, will feel it. On a serious note, it may be a broken transmission mount or a broken caliper.
There are a few reasons your car may shake when accelerating but not coasting. The most common reason is that the engine is misfiring. When the engine misfires, it doesn`t run as smoothly as it should and can cause the car to shake. Another possible reason is that the spark plugs or ignition coils are dirty or damaged.
WHEEL BALANCING

An unbalanced wheel will cause the tyre to vibrate which then causes the steering wheel to shake. If there`s too much weight on one side of the wheel, it can cause the car to pull to that side as well as shaking the steering wheel.

In most cases, the source of steering wheel vibration is the tires (since one directly controls the other), and the problem can usually be fixed with a quick tire balance. Under or over-inflation could also cause issues, so ensure all tires are properly inflated.
Knocking and shaking coming from your engine can be the telltale sign of bad fuel injectors. Another symptom could be misfiring or a vibration. Each engine whether it be a Diesel or gas powered, has cylinders. The more cylinders an engine possesses, the more power the vehicle has.
The main sources of vibration are the high-pressure fuel-pump, and the injectors.
Low automatic transmission fluid can cause shaking. If the shaking is accompanied by the check engine light, it`s time to visit a mechanic. Drivers of manual cars might discover their clutch master cylinder is the source of the shaking.
If the caliper or caliper pistons become stuck, it is unable to properly squeeze the brake pads against the rotors, which may cause you to feel some vibrations when you hit the brakes.
Power Steering Issues

You`ll know power steering issues are at fault if you only notice car vibrations during turns. Check for power steering fluid leaks.

Low Power Steering Fluid: One of the most commonly seen reasons for a shudder during turning is low power steering fluid. If the fluid level is low, the power steering rack and pump don`t have the right pressure to operate.
Does your power steering start to jerk or shake in your hands while driving? This could be because of low power steering fluid. Another sign of failing power steering is when your car shakes tremendously while idling. Make sure to get it looked at by a professional mechanic.
Bad Bearings — Friction from bad bearings or inadequate lubrication can cause a shaky steering wheel. If bearings are the cause, you`ll notice that the shaking only occurs as you turn the wheel. To solve this problem, you can oil the bearings, or schedule a service appointment to replace them if there`s damage.
Driving with unbalanced tires can be dangerous and cause significant wear and tear on the vehicle`s suspension system, such as vibrations in the steering wheel and seat, poor handling and stability, uneven tire wear, and increased road noise.
Driving with unbalanced tires can be dangerous and cause significant wear and tear on the vehicle`s suspension system, such as vibrations in the steering wheel and seat, poor handling and stability, uneven tire wear, and increased road noise.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

Car shudders in gas pedal and steering wheel, higher than 60 mph
ANSWER : If you did not have any issue before the tires were put on and now the problem has appeared, than this indicates that there is tire problems. I would recommend having the tire store put a different brand of tires on and see if the problem goes away. The tire store may have gotten a bad batch of tires. If they put the new set on and the problem still exist, then I would start looking to see if they maybe are not seating the wheels on the vehicle correctly or the rims are bent. If the tire balance machine is not calibrated, it can cause this problem too. Have another tire store check the balance with their machine and see if the tires were out of balance.

Car almost stalled, steering wheel locked up, all lights on dashboard came on, pushed gas pedal and nothing happened.
ANSWER : Hi there. When the engine is stalling and sputtering, this is an indication that the fuel system has lost pressure. Check the fuel pump relay and see if it is hot and if its clicking on when the key is turned on. If the relay is hot when the engine stalls or sputters, then there is an issue with the wiring to and from the fuel pump or the fuel pump maybe weak. For the steering column to lock up, the locking solenoid in the steering column losing power when the engine stalls. This could be an issue with the ignition switch as the solenoid is energized with the key turning in the ’ON’ position. The shaking could be either the brake rotors are worn causing the shaking when the brakes are applied or if the brakes are not applied, then the CV Shafts could have a joint that is felt when loaded when coasting. I suggest checking out the rotors, CV Shafts, the fuel pump relay, and the ignition switch. If you need further assistance with your engine stalling, shaking, and sputtering, then seek out a professional, such as one from Your Mechanic, to help you.

Stiff steering wheel and gas pedal, engine shudder
ANSWER : Hello. The power steering pump, power steering lines, and/or steering gear could be faulty or have a leak. The problem you are having with your accelerator pedal being hard to press could be due to a throttle cable that is sticking, or high carbon build up in the throttle body. The engine shuddering you are experiencing could be related to the spark plugs and could be fixed by replacing the spark plugs. My recommendation would be to have a certified technician, like one from YourMechanic, come and complete an inspection of the steering system to determine if there are any leaks, and make any necessary repairs.

steering wheel won’t unlock my key turns only to turn lights on but that’s it can’t unlock steering wheel to start the car what to
ANSWER : The steering lock may not be unlocking either due to a faulty ignition lock housing or more commonly as the cars age a faulty spring at the steering wheel on the under side of the column. If the ignition lock housing is the issue the housing can be replaced. It s a bit tricky as the mounting bolt has break off heads and generally need to be driven out with a punch. If the lock is not disengaging because of a faulty spring on the ignition lock many owners have had the spring removed by having it drilled out of the housing. However, removing the spring may permanently disable the steering lock. The last option would be to replace the steering column. You may want to enlist the help of a mechanic who can recommend the proper repair for your situation.

Car steering wheel seems to being pulled to the right when I turn left and car shakes a lot while driving over 60 mph
ANSWER : Normally on the Hondas, the front end components start wearing out as the car approaches 200 thousand miles. You could have one or more worn control arm bushings, ball joints, or tie rod ends. Your hard braking episode may have put enough stress on the components to cause a shift in the lose components which has messed up the alignment. There isn’t any point in trying to have the car aligned until you have replaced whatever is worn out in the front suspension. If you contact Your Mechanic, they can send a technician to your home or office to check out your Honda front end and let you know what pieces need attention.

Car stopped while driving , steering wheel hard to turn and car won’t start . Gas on empty
ANSWER : Hello,
It sounds like the vehicle may be out of fuel. If the engine has shut down (regardless of the reason), the power steering will no longer work, which is why the steering was hard to turn. I would recommend refueling the vehicle and trying to start it to see if this solves your problem.

When I crank my car it won’t keep running unless I keep my foot on the gas. As soon as I release the gas pedal my car stops running
ANSWER : The first thing you need to check for in a case like yours is air leaks. Check all the rubber parts and hoses under the hood for good condition and connection. The amount of fuel delivered to your engine is determined by the air that flows in and any air that gets in through a leak without being measured means less fuel being injected. There are of course a number of other possible causes; a failed Mass Air Flow Sensor for example, but they will require special skills and equipment to be examined. You can have this conveniently checked out by contacting Your Mechanic. They can send a technician to your home or office to check out your car and let you know exactly what it will take to solve your problem.

Steering wheel and front end shaking between 50+ mph
ANSWER : Hi there, thanks for writing in. The multiple warning lights illuminating on the dash is what triggers a red flag for me in your description above. The shaking in the steering wheel at the speeds you described could be tire, wheel balance or loose tie rod, or CV joint. However, it could also be the wheel bearings that are damaged and need to be replaced. If this is your problem, it could trigger the sensors on the hub that monitor the ABS, trac control and cruise control systems (which might be causing those lights to come on). The best option is to contact one of our mechanics to inspect your vehicle and take it on a test drive. This will permit them to recommend the corrective action to fix your Solara’s issues. If you would like help, consider having an expert automotive technician from YourMechanic come to your home or office to perform this inspection for you.