car runs rough at 45 mph

If the car is traveling 40 mph and the speed suddenly falls while the engine continues to rev, the transmission probably is to blame, especially if pushing the accelerator has no effect and the car continues to slow down. I had the transmission fluid changed a few months ago and the mechanic said there were no shavings in the fluid so the transmission is good. Was Told Why Is My Car Accelerating Slowly? Next time I am just going to buy the remaining six COP's and replace them myself, so that they will all be new. This can happen due to an improper air-fuel mixture in the engine. Flat rate pricing based on labor time and parts, Hand-picked, community-rated professionals, Trusted mechanics, rated by thousands of happy car Fixing this problem is as easy as replacing the bad plug. Injectors and plugs sound most reasonable right away. Your cars rear view monitor system is designed to provide you with greater safety in situations where you need to see behind the car when backing up. Use a scan tool that gives you live data and check some of the engine parameters. The car is still doing the same exact thing. So tis the season for the usual car runs rough on start up, misfires, CEL/MIL, stalling. The engine is misfiring as well. I dont know. Pls my car use to vibrate on dash bord especially when I put on acc. Hi I have a 1998 Honda Civic coupe dx my car keeps jerking at a speed to 30mph to 40mph and my car does not pick up the speed until about a good 20mins and still doesnt accelerate like its supposed to and cuts off in the middle of driving my car I put a new radiator in and I put new spark plugs in it and it just started to act like that after I drive from Marion to Columbus I got there and I went in the store and come back out try to start it it started but cut back off then I started it and I put it in reverse remind you my whole car is jumping engine is jumping crazy before i got there it was fine and it was fine when I purchase it 2 weeks ago then outta nowhere its been acting like now and only had my car for 3 weeks now. Long story short in my experience spark plugs can be a reason for misifing in a VR6 even if the first mech didnt install the new ones right. This article applies to the Mercedes-Benz C-Class and C-Class . You must also inspect the brake rotors and suspension parts for any damage. owners, Over 25,000 topics, from beginner tips to technical Its most likely a misfire. Trouble code P0455 (https://www.yourmechanic.com/article/p0455-obd-ii-trouble-code-system-gross-leak-evaporative-emission-by-john-nelson) is for the emissions system of the car and the only effect it will have on the car is the fuel economy may go down slightly and the car will pollute the air a little Engine misfires can be caused by a list of problems, but there are a few suspects that occur more than others. I like the computer answer better because it is cheaper and makes a little sense but after 70 mph or so the car stops with the jolting and insted just shakes a tad. I have a 2004 Serena when i drive slow or fast i am getting a jerk. However, if you're facing the issue of your car starting out rough and then staying that way (never smoothening . What Are the Benefits of Having an Engine Rebuilt Instead of Replaced. It is also possible there is a fuel supply issue: clogged fuel filter, weak fuel pump, fuel pump relay with burned contacts, or a fuel pressure Hi there. It can either be due to the age of the tires or if the balance weights come loose, especially if you have glued weights which is common on aluminum rims. To fix this problem, take your car to a tire shop to rebalance the tires. Im not sure I understand. It can also be caused by damaged brake rotors, driveshaft issues, bad wheel bearings, or other suspension problems. Hesitation / Misfire / Bucking at highway speeds - no codes Replaced because it was misfiring going uphill.1400 later and now it feels like the engine is jumping when it shifts into third gear. Read on to find out the top 4 reasons why your car starts rough then smooths out. In fact, there are many possible causes of car shaking. How many motor mounts are there? In an engine rebuild bearings, gaskets, and seals are replaced. it runs fine but when I try to get up to speed it starts running rough and I can't keep it at 45 mph it starts to idle bad at 2500 rpms the Car had new plugs and wires. This will cause the wheel alignment to be poor, which can also create vibrations during your ride as the wheel angles fight against each other. guides, Check cars for recalls, common issues & maintenance You can avoid this issue altogether by ensuring your cars parked in a garage or other protected location. lexus es 300.. with 220k 0n it.. the prolblem is check engine is on.. codes po 300 200 400 600 mis fire codes . Running rough at highway speed? | Focus Fanatics Forum Truck shudders between 45 and 55 MPH - Car Talk Community However, sometimes car jerks when accelerating is a common problem faced by several car owners. 5. No rotten Egg smells, Overheating, or low exhaust pressure and No Code PO420. Pay attention to any jerks or stutters, particularly while accelerating under a load, as a symptom. If you have inspected and tried all of the above then there is a risk that your drive shafts are out of balance or there is an engine problem. . SOLVED: Car stutters and hesitates at about 45 MPH - Fixya SOLVED: 1996 buick LeSabre runs rough at 50 mph - Fixya Can you describe the noise youre hearing? Also, if carbon has built up in your intake, throttle body, and EGR valve parts, this may cause the problem you are experiencing. Accumulated Moisture. We will discuss the causes of this problem and how to fix it. Typically for each Bank of exhaust there is one catalytic converter. Car runs rouhg at 50 mph When I reach speed of 45 mph to 50 mph the car starts to run rough - when I put on diagnostic machine the engine shows no sign of problem with injectors or plugs. Since this vehicle has a v-shaped engine, there would be two Banks of exhaust. It is possible that all of the spark plugs and spark plug wires need to be replaced in order to fix the problem on your Plymouth Grand Voyager. A co worker of mine had her car jerking, and she wasnt able to get it over 15 mph, up hills it had trouble with the gas pedal floored. Therefore there should be two catalytic converters total on the entire vehicle. One of the spak plugs was washed and the rest were not washed or removed. Carburetor Problems. Air filter tune up this and tune up that. Had new sparks plugs. when i put in cruise control it smooths out. 11 Causes of Car Losing Power When Accelerating (Gas & Diesel Engines), Top 6 Causes of a Car That Wont Accelerate, P0520 Code (Symptoms, Causes, and How to Fix), Death Wobble (Common Causes and How to Fix It), P0452 Code (Symptoms, Causes, and How to Fix), 9 Best Car Buffers and Polishers (Use What the Pros Use), 5 Symptoms of a Bad Fuel Tank Pressure Sensor (and Replacement Cost), Why Your Car Jerks, Lurches, or Stutters When You Accelerate, 9 Reasons Your Car Makes a Rattling Noise While Driving. Engine, transmission and rear end issues are usually more constant but can increase or go away under acceleration or decelleration. Youre right. These are the most common causes of this kind of problem, but far from every possible reason. So I paid to have them replace. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); Address: 9169 W State St #2867, Garden City, ID 83714Phone: 208-549-9411. That button can be inside the glove compartment or on the dashboard on a Lincoln. What causes roughness in my 2001 Lexus LS430 with 280000 miles - JustAnswer Any tests? I changed air fuel sensor I changed vacuum pipes and did a new service on the car it still jerks. When you put new plugs on, make sure you got the firing order correct. Your engine needs to take in air to start the combustion process in the engine. Made with in Silicon Valley. Don't forget, the boots are the culprit many times as well. If the check engine light is on, scan for codes before you do anything else. GTHOMASIV. Turnoff the motor and restart it and the problem usually goes away. We will be happy to assist you. Last night I was driving home and I heard this knocking noise, a minute later the noise went away and my check engine light came on. When I start my car to gear 1 and 2 it starts to vibrate,but gear 3 it does not vibrate,soon as you go back to 2, its start again,the vibration its on underneath on left hand side,please help. To correct the issue, check the power steering system for leaks and make sure the power steering fluid level is good. Few things are more annoying than a car that shakes when driving at higher speeds, especially when going for a long road trip. To find a time, we need to divide distance by speed. What you're gonna need is a real scanner, such as a Snap-on Soluus, have someone who knows how to use the scanner sit in pass. SOLVED: I have a 99 Pontiac sunfire with a 2.2L. it runs - Fixya Can you help what may be the possible, Hi Im wondering if you have any knowledge on my problem, I have 1 fault code mass air flow circuit a, I have changed the maf and air filter and map sensor I have replaced the egr valve, I have replaced the vacuum pump, I have cleaned the turbo and greased the actuator rod, and Im still haveing the same issue. I have a 2004 honda civic ex coupe I bought from person next door to me. I don't have any CEL. The mechanic reset the code and the scan shows normal all. Our certified mechanics come to you Backed by 12-month, 12,000-mile guaranteeFair and transparent pricing. I found my 02 beginning this same problem intermittently at about 37k. about what this is associated with this notorious light, what it is used for and If that is not the case, let me know. It also lacks in picking up speed to when trying to drive from a stop light or stop sigh. Hi, I discovered my car make strange sound like gun shot and it brings not too deep black smoke via the exhaust pipe. When going on speed 20-30 miles speed that's when my car vibrates, over 30 it stops vibrating, I was told the dealer that its the axel. When not enough air makes it into the combustion chamber, youll often get the same issues when not enough fuel. It could be a lot of things. Your cars air filter is the first line of defense against dirt and other foreign particles. It runs fine when held at a consistent speed. 2023 I dont know, but I would take it back to the shop and have them check their work. I replaced spark plugs all but number 3 today didn't change anything, change tps nothin, changed air tempature sensor and no change. The idle air control valve was my first thought for the issues when the car is not in motion, but the idle air control valve shouldnt affect the car while its moving. 135 miles 45 mph = 3 hours Example Question 2 Chris cycles at an average speed of 8 mph. Should I be worried if my car is shaking? I have changed plugs, maf sensor, leads, coil pack and its no different, any ideas to point me in the next direction would be greatly appreciated. Hesitation at around 45 to 50 MPH when you go to accelerate Hello. I was told that it was 3-4 clutch and I need to have the trans repaired. Cheapest and fastest thing to do first. The engine may also be much noisier than it normally is, sounding more like an aeroplane taking off than a car. 5 Symptoms of Unbalanced Tires & Tire Balancing Cost, steering wheel shakes when you press the brake pedal, Car Shaking When Braking Common Causes & What to Do, Why Is My Steering Wheel Shaking While Driving? One of the most obvious signs that your engine has a problem is stuttering while. The gasoline clot stuck inside the gas tank, impedes the fuel to reach the engine. The engine is misfiring as well. 1995 Chevy Camaro Car Runs Rough at 45-65 Mph - 2CarPros My car has 163000 miles. What happened was I pulled mud threw my intake and went into the third cylinder and it started missing. Spark Plug. Car out of cruise control flutters or runs rough from 45 mph to 55 mph and once over 55 mph runs smooth. See Also: 9 Reasons Your Car Makes a Rattling Noise While Driving. You should not have any more than normal repairs with this vehicle. Helppp, Any update? These problems can arise either from just the age of the tire or from a minor accident. Why does my car lose power while driving? - ArnoldClark Newsroom 10-15 mph, Rough Idling there are no scan tool codes that havent had the parts replaced. Signs of a Bad Transmission on a Car at 40 MPH | It Still Runs I consulted so many mechanics and they told me that its from the timing, electrical contact, airflow meter, brain box or pulley for timing. Sometimes first gear from a dead stop feels like a kick from behind but if I give it enough rpms its usually pretty smooth. The check engine came on once but after turning the truck off, the issue cleared and never came back. It looks like you have a bad computer, the Quad drivers for cyl 1-4 failed, you're loosing injector pulse. First thing I would do is change the engine oil in case water got in there. Low or high air pressure can cause a whole slew of problems for your tires too. You have to get it to start missing badly to throw the code. K I know it has minor issues already Heres my issue Im having alright the coolant overflow tank has grease and gas and oil mixed in. Hi I have a 1988 ford f150 5.0 5 speed just got it out of the shop and when I was driving home it started jumping and then would run fine then jump again badley just had new distributor new sensor relays so what could be causing this. Hi, my GM Acadia 2012 jerks while changing from second to third gear. Make sure the terminals are free of corrosion and the battery cables are tight. Ive got a Nissan Versa Note that only jerks from a dead stop till I get to about 30 or 40 mph at higher speeds on the highway it will start to fell like it is hesitating, any thoughts on that? What Could The Code Read Retrieval/Clear Mercedes-Benz C230. 11 Causes of a Car Losing Power While Driving Up Hills A clean filter can drastically improve the lifespan of your cars engine, including reducing or eliminating the acceleration jerks. Aside from the EGR system, the best way to inspect for a vacuum leak is with a smoke machine. My car shakes from 60kmh and below in a smooth road above that it's ok ,what could be the problem? SOLVED: Car runs rouhg at 50 mph - Fixya Misfiring Cylinder after replacing the plugs three months ago. Luckily for me the new mech was cool enough to replace the misfiring plug for 10bucks.