Vehicle is shaking bad, loss of response, slows down when off accelerator almost like it has an engine brake. Starting to lose pwr
I changed the transmission fluid and filter,degreased the engine and did the timing. Put it back together with the proper torque specs. I added dextrin 2 and Lucas transmission additive. I took the car out for a drive, everything was fine, shifting gears very good and responsive, but once I got on the freeway (55+mph) the car was shacking very very badly. I thought the wheels were about to fall off. I got it home, next time I took it out for a short spin the shaking was still there, but at an even lower speed (40 mph). I checked the timing, it was fine, CV axles seem alright, the bushings are
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Hello, thank you for writing in. Shaking typically is a result of an engine running issue. Did you add any fuel additives? These will clean the engine and cause the debris to comes loose. You may be feeling the result of the engine degreasing. If the electrical connections were contaminated, soaked, or shorted out during that process, you would experience similar symptoms. You should start by checking the spark plugs and make sure they are not wet or contaminated. Secondly you will want to scan the vehicle for diagnostic codes and check if any other electronic device that is monitored is detecting an issue (not all codes turn on the check engine light). With some further inspection on the engine’s electronics, you will likely find something was messed with during the engine cleaning that you did. For more diagnostic help, contact our service department to schedule an appointment.
How to Identify and Fix Common car Problems ?
Our sources include academic articles, blog posts, and personal essays from experienced mechanics :
You could have a damaged or broken motor mount. Motor mounts are the things that attach the engine to your vehicle`s frame. That sounds serious because it is, and damage to one or more of the motor mounts can allow the engine to vibrate and move around when you press the gas pedal.
This is a common symptom of a plug or wire electrical current problem. Air or Vacuum Hose – Another common cause for engine vibration and power loss is when air or vacuum hoses come loose, begin to leak, or rupture. The three necessities for all combustion engines are air, fuel, and spark.
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.
shakes and won`t accelerate, it could be a broken CV joint, broken motor mount, unbalanced tires, a loose wheel, or a stuck caliper. Here are some of the most common causes of shakey cars: Broken CV joint: If your CV boot is faulty, the inner CV joint can fail, causing the car to vibrate when you accelerate.
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.
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.
The only fix is to completely replace the CV joint. The main purpose of motor mounts is to attach a car`s engine to the frame of the vehicle. A secondary purpose is to dampen or reduce engine vibration so the occupants of the car don`t feel the constant shaking or vibrating of the engine while it`s running.
A major reason of vibrations in a vehicle is poor quality of fuel. Poor quality fuel usually has low levels of octane, because of a lack in octane, the engine tends to experience more load.
Some simple warning signs that the transmission is having problems: Transmission is slow to respond when shifting. Grinding, shaking, vibrating.
There are a few parts within a vehicle`s engine that could cause a car to shake if they malfunction. These include the spark plugs and engine air filter. Check the spark plugs and their connections. As a general rule, spark plugs last for about 80,000-100,000 miles, depending on the make and model of your vehicle.
Worn or dirty spark plugs can cause a petrol car`s engine to misfire in one or more cylinders, which can cause vibrations when the car is idling or at running speeds. The easiest solution is to replace your spark plugs and check the related wiring. Engine vibrations can also be due to the air and fuel systems.
Typically it`s from a damaged inner CV joint. These are located on the end of each axle. They both have an inner and outer joint that could be damaged and shake when you press the gas pedal. Another cause could be a broken motor mount.
Improperly functioning spark plugs cause an uneven burn of fuel in the engine, resulting in fluctuating RPMs and a louder noise. You might also experience increased vibrations of your vehicle while sitting idle or while traveling at low speeds. These vibrations originate from the engine and can shake the entire car.
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.
The Mass Airflow Sensor (MAF) measures the amount of air the car needs to accelerate. Once it gets that measurement it sends this information to the ECU which notifies the throttle to open accordingly. If the MAF is faulty and not measuring the airflow properly then you could experience a serious loss in power.
Fuel injectors may become dirty over time and not be able to provide as much fuel to the cylinder as is needed. Dirty fuel injectors may cause the engine to run lean which will in turn, cause hesitation when accelerating.
Why does my car not accelerate when I push the gas? A car not accelerating properly can be caused by a number of things. It could be due to the throttle body, gas tank, spark plugs, or the ECU. It could also be because you have a dirty air filter or a clogged fuel filter.
If your vehicle vibrates when accelerating, some most likely causes include a faulty braking system, imbalanced tires, a bent axle, or misfiring spark plugs. If the vibrations get even worse every time you accelerate, a bent axle is the main culprit.
When the torque converter starts malfunctioning, you may feel shuddering and even slipping in overdrive. You usually notice your car shuddering because it feels like it`s vibrating. Your car will vibrate even when you`re not going very fast. The shuddering makes the car lag and is very noticeable.
The gearbox fluid acts as a lubricant, so if you sense vibrations in the shifter when changing gears, then a gearbox oil change may be needed.
You experience delayed gear shifting and a sense of pulling or slipping when trying to shift between gears. The vehicle will not downshift as you slow down. An inability for the solenoid valve to operate may prevent your car from downshifting, and the engine will continue to rev as you attempt to brake.
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.
If you notice your car vibrates at certain speeds, but not every time you drive at that speed, there`s a chance the vibrations are caused by loose suspension components or bearings. You might notice that the vibrations increase if you hit a bump in the road and continue until you stop the car.
Relevant Questions and Answers :
the most relevant questions and answers related to your specific issue
Vehicle is shaking bad, loss of response, slows down when off accelerator almost like it has an engine brake. Starting to lose pwr
ANSWER : Hello, thank you for writing in. Shaking typically is a result of an engine running issue. Did you add any fuel additives? These will clean the engine and cause the debris to comes loose. You may be feeling the result of the engine degreasing. If the electrical connections were contaminated, soaked, or shorted out during that process, you would experience similar symptoms. You should start by checking the spark plugs and make sure they are not wet or contaminated. Secondly you will want to scan the vehicle for diagnostic codes and check if any other electronic device that is monitored is detecting an issue (not all codes turn on the check engine light). With some further inspection on the engine’s electronics, you will likely find something was messed with during the engine cleaning that you did. For more diagnostic help, contact our service department to schedule an appointment.
Car seems like it is slower to start when engine is warm
ANSWER : Hello, thank you for writing in. The vehicle may be having issues with the electrical connections to the starter or battery. There are several different ways to go about testing for this. The first thing to do is inspect all of the connections from the battery to the starter and the ground connection. Often heat will cause these electrical connections to get warm and it will cause more resistance in the system. The more resistance, the less voltage available for the component needing it. When it comes to the starter, if this is the cause, the starter will not turn as quickly and cause the engine to struggle while starting. The same will happen to the fuel delivery system, and you may want to turn your attention to the injectors and spark plugs if the starting system checks out. Only further diagnostics will tell.
When accelerating, engine shuts down
ANSWER : Hello. From the symptoms you are describing, it would appear that the vehicle is having some sort of serious engine performance issues. A few things I would check on are the fuel and ignition system. The sound you describe from the tailpipe may be a misfire, perhaps related to a fuel system issue. A weak fuel pump or a clogged fuel filter can starve the engine of fuel, which can cause misfires or stalling due to a lean condition. Stalling can also be caused by a wide variety of other issues, such as vacuum leaks, and even ignition problems, so a proper diagnosis of car stalling by a certified technician from YourMechanic is recommended to determine what the exact cause of the issue may be.
Spewing oil leaving a puddle an shaking violently starts but sounds very bad like it’s not getting oil an is rough sounding
ANSWER : Your description of the lack of oil tells me your engine is probably already badly damaged. The main problem is you drove it home with the problems you have described. The only way to save a motor from damage when oiling problems occur is to turn them off as soon as possible. The only thing left to do is to assess the damage.
This should begin by locating the oil leak. An oil leak that leaks this badly will often be the source of the deciding factor to how bad the motor has been damaged.
I recommend booking an appointment with one of our technicians to help you decide what to do next with your car; oil/Fluid leak inspection. This inspection will be a definitive answer to what could possibly be going on.
When you book the appointment, be sure to leave the technician a short description of what happened. This will help him come to you fully prepared to help you with what you need.
Good luck!
Throttle doesn’t open when I press down on the accelerator; vehicle starts fine and revs up smoothly; but has loss of power.
ANSWER : The throttle may not respond if any major computer sensor is failing if the computer cannot control the throttle safely. Have the codes scanned to diagnose the problem. If you need a mechanic like one from YourMechanic have one scan and diagnose the problem. It may be the pedal sensor causing the problem but would need testing.
Fuel pump engages. Batery good, alternator good volts, jump start helps when wont start. Temp does not matter. Intermittent?
ANSWER : Hello. Thank you for writing in. There are several reasons your vehicle may only start when jump starting. The first and most common is a build up of resistance that is causing you to need a boost of voltage to get the engine started. This may be due to poor battery cables, a bad ground connection, a poor starter solenoid, and a couple of other issues. The first thing you want to do is perform a visual inspection of the starting system. Make sure there is no corrosion build up in the battery cables. You can also check the resistance across these wires and make sure you have a solid connection between components. You then want to make sure the starter solenoid is doing its job. It is responsible for taking the small amount of electricity sent by the ignition and turning it into a huge electrical charge that is strong enough to push over the engine with the help of some gear ratios in its favor. Do some more testing, and stick to the basics before assuming its something seriously complicated.
Why does my car struggle to start every 4th to 5th time?
ANSWER : It sounds like your starting issues may be linked to a problem with air metering or fuel delivery. A clogged or malfunctioning idle air control valve may show some of the same symptoms you are describing. The idle air control valve can be stuck in a cold start position which may work well if the car has been sitting a few hours, but as the engine warms up there must be a regulation in airflow. Consider hiring an experienced technician like one from YourMechanic who can come out for a closer look at your hard start situation and offer a more personal diagnosis.
Hi I have an 2001 Infiniti i30 and when I put it in drive it starts to shake and when I start driving it starts shaking and rumbl
ANSWER : Hi there. There are many sources that cause vibration, and if a single component designed to dampen that fails, you’ll feel it. Motor mounts, transmission mounts, suspension bushings are just a few of the things that are designed to minimize vibration. However, damage to fuel system components like a mass air flow sensor can also cause this type of problem. The best way to narrow the causes down is to have a professional mobile mechanic come to your location and complete a car shakes and vibrates inspection.
