. I noticed it only happend in this speed range and only on one specific entrance of highway. Runs Rough And Shakes When Car Is Warm Especially Going Up Hills. Car runs fine for 15 minutes, then runs rough and stalls. 20" Black SRT10s-EFX Rollpan-GrillCraft MX Grille-Flame Red Heads-DMH ECutout. If that fails, tighten the engine mounts slightly, and sometimes a slight alteration to the tyre pressures will cure it. But you can pedal through and it does get smoother Mechanic's Assistant:Does the vehicle also idle rough? It does it most often when you are barely on the gas at 45 to 50 MPH and then you press the gas to accelerate. Now my air bag sensor is going off. At around 40 to 42 mph it will accelerate rough. Most vehicles have a maze of hoses throughout which create a vacuum for both fuel and air. It's a noticeable problem and feels like you're driving on a road with lots of small bumps. Tires need to get replaced once in a while because they are made of rubber, which will get old with age and start to crack. 137,185 Report; T_S_T . Put On New . Question type: Maintenance & Repair My 2003 Honda Accord started to shake sometimes when I tried to accelerate between 35 - 45 mph. 4) Vacuum leak. It will not always buck or hesitate once it runs rougher, but it will ONLY do it after the load, sound, and running rougher have started. Tran fluid changed at 110k, spark plugs and wires at 102k. At normal city driving speed, 45-55 mph, Big Red (that's her) tends to shudder a bit. 5) Clogged Fuel Injectors. Runs rough from 45 to 55 mph. The final straw is that for several years in a row, Elantra owners report significantly lower gas mileage than the EPA estimates, & there's a small trend of engine problems. Picture yourself driving a 50 mph. Mine would jerk like every sec for like up to 30 secs or so in the situations where it would be going 50 or so especially up hills. This only happens about half the time, and only after. When the transmission shifts, engine noise usually will quiet down, and the RPMs will drop. It hesitates for a second and then takes off. Yes. 1. 4 Common Reasons Why Your Engine May Be Idling Rough. steve63 January 7, 2014, 10:13pm #1. Jones\\' team wins at PersimmonTom Jones, Doyle Green, Gary Mitchell and John Bennett combined to card a 30 while winning the weekly Wednesday morning scramble at Persimmon Ridge.Mark Love, Mike . So that eliminates the tires & wheels for sure. That is about the speed it normally shifts gears. took it to serviceman and no codes came up again, but still doing it. The most likely cause is a wheel is out of balance. Maintenance/Repairs. But once I get through that, about 45 mph, it runs great - plenty of power, I can race it right upto 70 mph and beyond. Runs rough from 45 to 55 mph. Jun 18, 2019. Damaged Tires or Rims. 06-caravan-runs-rough-25-45-mp WE also cleaned the Throttle body, changed plugs, wires, EGR valve, imput/output on transmission, MAP sensor, throttle position sensor. 7) Bad Spark Plugs. when I try to stay at 40 45 mph my car chugs jerks slightly, but when I hit the gas it goes away only usually at those speeds. . mercedes-benz, e-class. my 05 t & c van runs rough when on smooth road at 45 mph. Rough shifting between 20-45 mph. Fixed vacuum line from manifold to fuel tank. Have your local shop check it out., Also could be a wek timeing chain. Run along at 75 mph for a few more hours, slow down in town and the rough idle/sluggish acceleration returns. This only happens about half the time, and only after. Sound familiar? By Guest, June 25, 2002 in Buick Reatta. Fuel filter just changed, it was dirty. 2004 3.9 V6 automatic has 127k miles. Most newer vehicles, however, have a throttle to regulate engine speed and airflow through the system. Car is running rough at 40 to 45 miles per hour 1994 Cadillac Seville Asked by Joej in Elkin, NC on October 31, 2009 The car misses at 40-45 in overdrive change to drive 3 and it quits any insight 1 reply Report Answer Popular Answer Oakman on November 03, 2009 A secondary ignition misfire can cause the conditions you are having. Hello everyone, I just got my first mustang and I'm having a few issues, it's a 2000 v6 5 speed. Lasts only a second or two and quits until I accelerate again. 2001 Taurus 3.0L 4V 6 CYL Duratec with 48,000 miles. Anything sound different? Basically - part throttle, light load, slight grade or hill. 2000 Ford Expedition runs rough at 45 mph it is very rough. It can also be caused by a damaged sensor disturbing the air-fuel mixture like the MAF sensor or O2 sensor. Fuel filter just changed, it was dirty. Can anyone help me with this? 20" Black SRT10s-EFX Rollpan-GrillCraft MX Grille-Flame Red Heads-DMH ECutout. problem is intermittenmt. 1995 Chevy Camaro Car runs rough at 45-65 mph HALFASSPUNKSHOW MEMBER 1995 CHEVROLET CAMARO Engine Performance problem 1995 Chevy Camaro 6 cyl Two Wheel Drive Automatic 161k miles Just bought a 95 camaro 3.4L engine code S and I have been noticing at 45-65 mph it runs rough and like it wants to die out. 3) Clogged Air Filter. Clean air filter, oil is clean, (no antifreeze that I can see). A worn out lockup clutch can make the transition from acceleration to direct drive difficult, and it's a sign that you need to have your transmission checked. Around 75,000 miles or so, the valve cover gaskets start to leak oil down into the deep well around the spark plugs. Accelerating, car is very sluggish, totally under-powered. 1 Answer 600 2004 3.9 V6 automatic has 127k miles. I took it to the mechanic's and he found and fixed a leak in the intake manifold. Done your drive shaft is out - put the transmission back into 2wd, and take a spin to see if your vibration is gone. At around 40 to 42 mph it will accelerate rough. MAJOR15 MEMBER; 2005 MERCURY MARQUIS; V8; 2WD; AUTOMATIC; 91,000 MILES; My problem is between 45-50 MHP the car stutters and skips when the RPM's are low. "Code Red" 07 Ram RC 2/4.5 2WD 4.7. I replaced spark plugs all but number 3 today didn't change anything, change tps nothin, changed air tempature sensor and no change. I managed to scrounge up another set of wheels and tires this morning, mounted all four, and no change in the vibrations. 7.2. pretty bad . Take the truck out of 4-low (or jack up the front wheels) 4.) Posted by Anonymous on Sep 27, 2008 Want Answer 0 A couple of months ago, following problems developed: 1. started to idle rough in morning for a few minutes; 2. between 35 and 40 mi. I am running out of ideas also when I hit the gas hard I get black smoke. These are the most common types of causes of this type of problem, but far from every possible reason. 1. 2000 Ford Expedition runs rough at 45 mph it is very rough. Home \ Uncategorized \ car runs rough at 45 mph . Seems to happen after the car warms up. 2007 4runner sport 130,000 miles 6cyl bucks or jerks at around 45+ mph under slight acceleration noticed mostly on slight uphill grade. Shut the engine off, even just long enough to fuel-up, and it starts up and runs fine again in every respect. No codes, Dealer can't find problem. As the car approaches 40 mph, the RPMs will increase in the engine. Jump to Latest Follow Hello Everyone! ? Reasons for a Rough Idle or High RPM 1) Bad Spark Plugs 2) Bad Ignition Coils/Wires 3) Vacuum Leak 4) Carburetor Issues 5) Dirty Fuel Injector 6) Clogged Air Filter 7) Bad Idle Air Control Valve 8) Incorrect Cam Timing 9) Incorrect Ignition Timing Things to Remember Reasons for a Rough Idle or High RPM I don't think it is a transmission issue as the transmission will shift with no affect on the shudder. Unless you are constantly watching your speedometer (instead of the road), your speed is probably going to drift up and down a bit. also there is no problems coming up in the info panel This might occur at speeds around 35-45 miles per hour. At that moment, a bad transmission can cause the car to jerk, and that could be accompanied by a loud "slamming" noise. McGaughys Deluxe 2/4.5-Two Toned OEM SRT10 Hood & Wing-TMD Bumper Cover. Pretty soon, all of them gets oil soaked, and then your told you need more plugs, coil pacs etc. There is a shudder under acceleration that starts at 30 mph and will continue to 40 mph were it goes away. When I hit the 45 -55 mph range or 2,000 - 2,500 range, the truck starts feeling slugish. #1. That is about the speed it normally shifts gears. A read more brownjeff Associate Degree 13,873 satisfied customers 2002 Chrysler Town & Country: Cruise Control..speedo..dip..light comes . This generally will happen at the same speed with consistency as . It continue to run rough until I got to about 45 mph when it became less noticeable. Tires need to get replaced once in a while because they are made of rubber, which will get old with age and start to crack. The most common reason a car is losing power when accelerating is due to a clogged fuel filter or engine air filter. I have a 2012 traverse. Reasons Your Car Loses Power Going Uphill 1) Bad Fuel Filter 2) Clogged Exhaust Filters 3) Clogged Air Filter 4) Vacuum leak 5) Clogged Fuel Injectors 6) Bad Fuel Pump 7) Bad Spark Plugs 8) Bad Ignition Coils or Spark Plug Wires 9) Faulty Camshaft Position Sensor 10) Low Cylinder Compression 11) Ambient Conditions Things to Remember ON at 35, OFF at 45. 3.) pperro57@gmail.com. Reasons Your Car Loses Power Going Uphill. 2) Clogged Exhaust Filters. Vacuum Leak. The most common reason why your car is shaking; is damaged tires or rims. 6) Bad Fuel Pump. The boot, spark plug and wire gets saturated with oil and then misfires. 8 Answers. with slow acceleration, started to hesitate, almost. to the tune of some serious money!! Car running very rough when I start driving it, won't go more than 30 mph even if I floor it. 1992 Mercedes 300E with 160,000 miles that I've owned for 15 years. 5.) 2009 Honda Accord LX-Maintenance & Repair. Mine would jerk like every sec for like up to 30 secs or so in the situations where it would be going 50 or so especially up hills. McGaughys Deluxe 2/4.5-Two Toned OEM SRT10 Hood & Wing-TMD Bumper Cover. On a cold start it runs and drives great, but after it warms up it idles rough and actually died on me yesterday and didn't want to restart, after letting it sit for a while it started fine and ran fine. check engine came on twice and each time reset. Posted on Jul 10, 2010 Helpful 2 Not Helpful Flag You can't post conmments that contain an email address. Car runs fine for approximately 10-20 minutes and then starts to sputter and cough and if I don't increase the RPM's it will stall. The most common reason why your car is shaking; is damaged tires or rims. 1. It's like a high frequency vibe, and you can feel it mostly by the seat of your pants, and is slightly worse under acceleration. No shaking when speed is over 45 mph or on other road. Hesitation at around 45 to 50 MPH when you go to accelerate Hello, I started getting a hesitation/bucking in my 2001 F150 SCREW 5.4L 96,000 miles. 2005 Mercury Marquis Rough running at 45-50 MPH. 1) Bad Fuel Filter. You check transmission fluid while car is running and is in P or N. Take it out for a drive, come back, keep car running, put in P or N, open hood, pull out dipstick, wipe it clean, stick it all the way back in, take it out, and check it. Tran fluid changed at 110k, spark plugs and wires at 102k. These issues could occur either from just the age of the tire or from a smaller accident. 06-caravan-runs-rough-25-45-mp WE also cleaned the Throttle body, changed plugs, wires, EGR valve, imput/output on transmission, MAP sensor, throttle position sensor. 8) Bad Ignition Coils or Spark Plug Wires. However the vehicle is still running roughly around 45 mph, when I normally increase the speed. The engine is misfiring as well. "Code Red" 07 Ram RC 2/4.5 2WD 4.7. Share . idle and coasting OK, high speed OK. Gas mileage down from normaL. IF I . this issue started when I had about 97000 miles and has gotten worse. These issues could occur either from just the age of the tire or from a smaller accident. In older engines with a carburetor, this vacuum pulls the fuel into the engine. Try lowering by a couple of pounds all round. rotate the front drive shaft 180 degrees to reach the other 4 bolts and remove them. The car likely would still run fine at lower speeds, but it should be taken to a mechanic immediately. If I accelerate fast, the car doesn't run as bad though. when i engage cruise control at 50 mph it smooths out. If I accelerate normal or slower the problem occurs. You may have to find a garage that can balance your wheels on the car.. took it to serviceman and no codes came up again, but still doing it. car runs rough at 45 mph. 1 Answer 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. Customer Question 2000 Ford Expedition runs. i have a 2008 malibu LT 2.4 v4 and when its mid 80s or hotter out when ur driving down the road mainly on takeoff or 40+mph if the ac is on the car runs rough like it has no power it wont go over like 1500 rpm to get up to speed it only has 70k miles on it so if anyone has any input plz post thanks. 1970 Answers SOURCE: when im driving about 45 or 50 mph my truck starts mcdevito75 here, It could be a dirty gas filter, weak fuel pump, fulty needle valve in the carb. . Also, he had the second cylinder replaced, as it was misfiring. Has been a good car so far, other than usual repairs. Check engine light flashing on 2000 honda Accord LX 1 Answer. Damaged Tires or Rims. 45 to 60 mph Engine will start getting to wear it is working, starts to sound "different" and run a bit rougher, then it will buck or hesitate.