car sputters at 55 mph

30-40 mph the car jerks and bucks. Air Filter: A dirty air filter, especially one that hasn’t been changed in a long time, is like a stranglehold on the engine. Over time these Oxygen Sensors get contaminated with dirt particles, which means they are unable to relay information to your onboard computer. The old replacement, black valve cover gaskets, are leaking again. The primary ones include RPM which stands for revolutions per minute and torque. Lost because of the low miles.Car passed inspection/emission with no problem Trying to sell the car but this is the only problem. Any thoughts? When a fuel pump malfunctions, it typically sends too little or too much fuel into your engine. The combustion chamber in your vehicle necessitates the correct amount of air and fuel. The gaskets and seals are what stop oil and exhaust gases from getting inside the Combustion chambers. My car is hesitating / jerking at speed intervals of 20 mph, 30 mph, 35 mph and 40 mph. The main reason behind engine sputtering is caused by the wrong combination of fuel and air inside your engine. This is also the reason why a car starts to accelerate faster once it reaches higher speeds. My 3.0 V6 Sputters, Bucks/hiccups, when Cruising at around 40-45 mph. My car is sputtering ever so slightly when I am on the highway going to work. If your exhaust system has sprung a leak, these gases start to escape before reaching the tailpipe. We have tried working with the dealer and the basic oil, gas etc changes nothing helps and it is only getting worse. This comes and goes but happens enough that I have a service appointment scheduled for tomorrow with the dealership. Lasts only a second or two and quits until I accelerate again. Customers are getting helped faster than ever before, HONK Honored with 2021 Best Places To Work Awards, Service Provider tips to stay safe during winter weather, Service Provider tips to minimize damage claims, HONK Partner Series: Flight Road Services, A HONK PSA: Slow Down, Move Over, Save Lives, Knowing how to identify a professional tow truck operator so you can protect your wallet when your car breaks down. Start the engine and, using a mechanic stethoscope, listen … Picture yourself driving a 50 mph. The fuel injectors in a car perform the function of spraying the fuel into combustion chambers. This means you eventually start adding less torque energy levels to keep the screw going. The one requirement to this particular correlation will be that the car needs to change gears as soon as it reaches a peak RPM (In an automatic transmission the car switches gears on its own, while in manual transmissions you will need to change the gears). If your fuel filter is old and dirty, then less fuel goes into these combustion chambers. Vehicles operate in a very similar way. Normal acceleration car runs fine. The Mass Airflow Sensor performs the function of ensuring the correct air amounts are supplied into your combustion chambers. Two weeks later its sputtering/chocking on flat freeway, again at 60-65 mph and if the pedal is pressed hard it will even out. Faulty spark plugs. When i would gently accelerate while going anywhere from 40-55 mph the car would start to jerk and sometimes make a sputtering noise, but when i would press the accelerator for more gas the jerking would stop. The combustion engine (internally) works with ignition from a mixture of air and fuel. There are a number of forces that work together in an engine that translates into speed when you are driving your car. I own a 2003 Honda Pilot. This then mixes with air, which is then ignited by your spark plugs. There are 3 sensors you should check on and these include the Mass Airflow Sensor, the Manifold Absolute Pressure Sensor, and the Throttle Position Sensor. An Issue With Your Accelerator Pump. ... Only a biker knows why a dog sticks his head out of a car window. What could be causing this? If I apply more gas, it comes … It runs good until about 55 mph and then sputtered when I try to add throttle. Bad or malfunctioning MAP sensors 3. They also recommended I replace the spark plug wires since it has 80K miles on it. I have a 2005 T&C 3.8 liter automatic. It could range from anything that includes clogged fuel injectors to faulty catalytic converters. But smooths out after 65mph. If you fail to conduct the necessary repairs for your catalytic converter it will eventually break down and your car will stop working. Engine starts right up and idles smoothly. I have already replaced the spark plugs and adjusted the pilot screws out 3 turns. The exhaust gases that are produced are known as byproducts. Happens each time right before the higher gear kicks in through out all speeds as well. Engine Misfire While Moving . Someone will get back to you soon with a response…. This usually causes slower acceleration. when i put in cruise control it smooths out. It only happens when the RPMs are below 2k.

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