Car is vibrating when accelerating

When I press my gas from a stop it feels like I'm pressing on air like my car isn't getting power but while I'm pressing it the car is vibrating after a few seconds it stops then takes off like normal and it will continue doing this every few minutes or so I also lost my gas cap and left it off for about a month just got a new one 2 days ago don't know if that had anything to do with it just got my oil changed also and transmission fluid is full.

My car has 1128933 miles.
My car has an automatic transmission.

Experienced mechanics share their insights in answering this question :
Hi there. There are several possibilities for the vibration and lack of power upon vehicle acceleration. The missing fuel cap should not affect drivability. Assuming the Check Engine Light has been on for the missing fuel cap, this leads me to believe the ECM (engine control module) may be recognizing the fault upon acceleration.

If the Check Engine Light flashes when the vibration is felt, this would indicate an engine misfire. This may be the result of a [faulty/worn spark plug](https://www.yourmechanic.com/services/spark-plugs-replacement or a faulty ignition coil. It could be also be a low fuel pressure situation caused by a faulty fuel pump or a faulty fuel pressure regulator. Accessing the ECM/computer for codes may help identify the area of concern.

I recommend having your vehicle’s vibration and lack of power be diagnosed and repaired by certified technician, such as one from YourMechanic.

How to Identify and Fix Common car Problems ?

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The problem with most shaking and vibration issues is that one damaged component like broken motor mounts can mask other parts that may be damaged. A cracked exhaust manifold is one of those that can cause the vibration and noises you`re hearing on your Trailblazer.
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.
An engine that is hesitating to accelerate is most likely dealing with a fuel/air mixture that is too lean. Engine`s that are running inefficiently will begin to show signs like hesitation which will only become worse over time.
This issue is related to the throttle position sensor, and can be caused by faulty wiring to the TPS, bad connection at the TPS, or a failed TPS. To correct this issue, the wiring harness, connector, and throttle position sensor must be inspected, tested, and/or replaced. The most common cause is a faulty TPS.
CV joints are located at the end of each axle. There is both an outer and inner joint. When the inner CV joint is damaged or begins to fail, you will notice your car vibrating under hard acceleration. As it gets worse, the minor vibrations turn to violent shaking when under load.
The most prevalent cause of vibration is problems with your wheels or tires. The potential problems include improper wheel and tire balance, uneven tire wear, separated tire tread, out of round tires, damaged wheels and even loose lug nuts.
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.
Automatic transmissions that shift hard, jerk or shake during a shift change may mean your transmission fluid needs changed or fluid level is low. In manual transmission vehicles, abnormal gear shifts could indicate damaged gear synchros, worn clutches or other, more severe issues.
Fuel injector nozzles can become clogged over time, which can lead to a sputtering engine, slow acceleration and the car not having enough power. Fuel injectors can be cleaned if the problem is caught early, but as the conditions worsens, the injectors may have to be replaced.
There are several causes for your car to lose power significantly while accelerating. The most typical causes of a car not accelerating while driving include a faulty sensor, contaminated fuel or air filters, or a faulty timing belt. Generally, this isn`t something you should ignore.
Cars that have an ECU (engine control unit) can sometimes lose power if the system detects a mechanical error in the car that doesn`t actually exist. As a result, the ECU tells the car to lose power, or in some cases stop completely, to prevent an accident.
A faulty oxygen sensor can certainly cause an engine to run rough and cause a bit of shaking due to the imbalance in the air/fuel load.
If the sensors on the throttle body are faulty or it`s simply damaged, your engine`s idle speed won`t feel correct and you`re likely going to have some shaking.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

Car not speeding up smoothly, service engine light on when first start driving and car vibrating
ANSWER : Hi There,
It sounds like you may have a dirty or faulty mass air flow sensor. The problem this can cause may also be compounded when the engine is cold due to the change in air density in cooler weather. The mass air flow sensor monitors air intake as it is mixed with fuel prior to being injected into the motor. This sensor relays information about fuel and air temperature, air speed entering the motor and many other things to the ECM which uses this to make adjustments to fuel supply to the motor. A dirty or faulty sensor can cause an imbalanced air/fuel load to be supplied to the motor which results in an over fueling or under fueling situation depending on the conditions. This type of inconsistent fuel supply to the motor may cause a hesitation, loss of power, a jerking reaction, potentially a bit of black exhaust smoke and typically a strong smell of fuel when this sensor is malfunctioning. I would suggest having a professional from Your Mechanic come to your home to diagnose and inspect your vehicle.

My car started idleing rough, vibrations soon as start car, vibrations soon as I accelerate, vibrations, rough idle bad
ANSWER : This sound like you may be having an engine misfire. Have the system checked and scanned to see if codes are present for an engine misfire. If it is, then a mechanic can check to see if a coil or spark plug has failed. You may have oil leaks in the valve cover seals that has caused the ignition to short out in the spark plug holes. A repair of your valve cover gaskets may be necessary, along with the other components that I’ve mentioned. I’d recommend having the vehicle looked at by a qualified technician who will be able to diagnose these misfiring symptoms and fix it accordingly.

Vehicle vibrates while accelerating and stops when you take your leg off the pedal or accelerate more
ANSWER : I suspect you have a problem in a CV joint, or if you have the all wheel drive version; in a drive shaft. The joints that enable the shafts to move around can wear out and when they do, they can produce a vibration at "resonate" speeds. There might be a vibration at 40 MPH that smooths out at 50 and then returns at 60. Or any other odd sounding pattern. You can have that conveniently checked out by contacting Your Mechanic. They can send a technician to your home or office who can check out your Toyota’s vibration and give you a more exact idea of what is the problem and what it will take to fix it.

My car vibrates when I’m waiting at the light . It drives fine . And it vibrates more when I turn on the ac? Can itvtve motor moun
ANSWER : There are two principal possibilities: faulty motor/transaxle mounts, or an engine operating or mechanical condition including the possibility of a faulty harmonic balancer. To obtain a conclusive diagnostic, please simply request an engine vibration diagnostic and a certified Mechanic, dispatched by YourMechanic right to your location, will get this resolved. If you do need new motor/transaxle mounts, genuine OEM Nissan mounts are recommended in order to maximize the chances of resolving the problem. If you have further questions or concerns, do not hesitate to re-contact YourMechanic as we are always here to help you.

When stopped in Drive, the car vibrates. You can especially hear and feel the vibration mostly in the back of the car 2002 Infiniti I35
ANSWER : Hello – I would be suspicious of an exhaust system hanger which has gone weak, and is allowing the exhaust to bump into the chassis at an idle. It is also possible that the fuel pump is wearing out, and the "chattering" that a worn fuel pump makes is transmitted through the fuel tank into the car. It would be easier to notice at a stoplight, but fades while driving as other road noise increases. I recommend a vibration and noise 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.

I put the wrong key in my car and a few weeks later my car just shut down and it will not start I believe it’s the computer but…
ANSWER : Hi there. What had happened is the wrong key set the security to the vehicle. This is to prevent the vehicle from starting with the wrong keys. Try removing the battery cables (+) and (-) for 13 minutes. During that time, put the original key in the ignition and turn it on. Activate everything in the car even though there is no power. Then remove the key and hook up the battery cables. The computer should have reset and reset the security. If the security is still being tripped, then I recommend seeking out a professional, such as one from Your Mechanic, to help you

02 trailblazer vibrates when accelerating
ANSWER : Hi there. The problem with most shaking and vibration issues is that one damaged component like broken motor mounts can mask other parts that may be damaged. A cracked exhaust manifold is one of those that can cause the vibration and noises you’re hearing on your Trailblazer. Before you decide to take your vehicle to the dealership, it might be a good idea to have a local professional mechanic complete a vehicle is making noise inspection; to determine if other components might be damaged as well.

1994Camaro 1994 Chevrolet Camaro Base 6 Cyl 3.4L My car is accelerating with me stepping on the gas I was driving fine all day
ANSWER : The throttle on this car has a cable and you should check the floor mat to make sure it is not holding the throttle pedal. Also, look at the throttle body to make sure something is not holding the throttle open. If everything looks okay, then check to see if your idle air valve may be stuck. This can be done by a computer test to see if it is setting a code. A technician from YourMechanic can come to your car’s location to have this checked out if you are still having problems.