SOURCE: hesitation at 40mph and 50 mph. Hesitation on acceleration. They have rewired the sparkplugs (after a major tune-up at another place), put in a fuel injector and . Doesn't appear to be overheating, and temp gauge seems to be working fine. Normally under these circumstances Id look into normal causes such as Coils, Wires, O2 sensors, Injectors, Fuel pump/filter, etc. help please! Can you describe the hesitation problem in as much detail as you can? Spark plug health, Air Filter clean, Fuel Filter replacement. Truck shudders between 45 and 55 MPH - Car Talk Community Misfiring might be occuring. Jump to Latest Follow Follow Actually you can probably get your purchase price back very easily w/o reselling. Could be a number of things. remove and spray with carb spray and make the the If your car is moving at 40 mph but is unable to accelerate any further, the transmission probably needs service or replacement. As you go down the road it has a slight jerking action. Only to find out that it was my EGR It doesn't happen consistently. There are a lot of things that can cause this. ALL have result in a CEL but NONE exhibited any physical indication of fault. either. V6 Accord's are particularly prone to bad ignition coils. So new spark plugs, battery, oil changes etc. The vehicle has a stumble like a misfire(I think anyways) when driving. If the MAP sensor is not working, the engine control unit wont know how much fuel to inject in order to accommodate the given engine load. Just for giggles try putting in a water-remover fuel additive to the gas tank and see if there is any difference. Acceleration problem above 35 mph - Car Forums and Automotive Chat But this too would be noticeable at many speeds. How to fix it. I have spoken to Prior to EFI there was no feedback loop on fuel trim (remember those things called carburetors?). My computer for editing / uploading: https://amzn.to/2uUZ3lo7. Jun 16, 2016. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); Mailing Address:9169 W State Street, Suite 2867Boise, ID 83714. Based on this information, the engine control unit will know if there is too much or too little oxygen being ignited in the chamber. Sounds like your car is entering limp home mode. Must be 18 years or old at the time of entering this giveaway OR have your parents permission.6. Car is Had one of my U joints replaced. Quick edit: I confirmed the TPS was getting proper power voltage. Depending on what carb you have, there may be a small screen where the fuel pipe attaches to the carb at the float bowl. The car still struggles with acceleration, jerks more than it smoothly drives, shakes if I try to go too fast, brakes get hard sometimes and engine stalls forcing me to pullover and cut it off for a few mins before driving again. The battery has a battery temperature sensor that can fail if the Check Engine Light comes on, the battery voltage is low, or the RPM curve surges. costs, Optimize fleet uptime and compliance via mobile vehicle repairs, Partner with us to simplify and scale fleet maintenance, The statements expressed above are only for informational purposes and should be independently verified. My car is hesitating / jerking at speed intervals of 20 m - YourMechanic For a better experience, please enable JavaScript in your browser before proceeding. looked at that yet? Good luck, I'll keep Ever since they replaced the plugs everything works AMAZING and the car drives really smooth. I replaced spark plugs all but number 3 today didn't change anything, change tps nothin, changed air . a friend. I've been an auto mechanic for the past 50 years and I'm here to share my knowledge with you.Here's our weekly video schedule:Monday: Tool giveawayTuesday: Auto repair videoWednesday: Viewers car mod show offThursday: Viewer Car Question Video AND Live Car Q\u0026AFriday: Auto repair videoSaturday: Second Live Car Q\u0026ASunday: Viewers car show offSecond Daily Upload Every Afternoon of Live Car Q\u0026A videos as well!Scotty Kilmer is a participant in the Amazon Influencer Program.#savagescotty A good fuel injector cleaner is often a good, cheap fix that will restore proper fuel flow from the injectors. I replaced the spark plugs last night after reading your first post Marde. Im not sure I understand the question. Help? An engine that hesitates when accelerating is either sucking too much air, not getting enough fuel, or misfiring. If you aren't going to deal with the tank immediately start carrying around fuel filters to swap out as they clog. fuel pump. Saturn SL with 169450 miles.. about 50 miles ago she started stuttering from front to back while in 4th gear going about 35 mph also in 5th gear going 70mph. My 2008 nissian Altima is hesitant when going up a hill or accelerating Ive changed the fuel pump the air filter and the air intake hose but it is still having the same problem, We found my car was hesitating and stalling when I took off from a stop or went up a hill because after 24 years, the motor mounts were worn and that caused rubbing of the wire harness and some of the wires had the insulation rubbed off, causing shorting. What could be causing this? This along with using 87 octane or higher gas solved the issue entirely. around 40 mph. http://www.g6performance.com/forum/showthread.php?t=22038. The Fora platform includes forum software by XenForo. the same problem and this is actually a deciding Mechanics computer says one of my engine coils needed to change and so I changed all of them. Do I need to get a specific tool, or take it somewhere to get tested? To help you pinpoint the cause of this problem, below are 10 of the most common causes of engine hesitation while driving. At that moment, a bad transmission can cause the car to jerk, and that could be accompanied by a loud "slamming" noise. That rules out 2, 3, and 4 of your theory. Youll probably need to take it somewhere to have the issue diagnosed. Could be bad gas or an unrelated issue. Clear editor. My car used to do the same exact thing, I literally went to 5 also the car seems to shutter or almost feels like i am going over small bumps in the road even though its completely flat. Why would my 2004 Dodge ram 5.7 keep throwing a map sensor code and I changed out the senser and the computer and now that I have a new computer it hesitates on takeoff. Check the fuel filter, fuel pump, etc. lol. Im not sure I understand the question. Saturn Outlook we are looking at. Have you checked the spark plugs? Also carbureted It idles fine revs up fine takes off fine but when get it under load starts bucking and more gas you give the more it wants to die . Youll probably have to take it to a shop to get that diagnosed. Im not sure. Professional Socket Set: http://amzn.to/2Bzmccg 4. It was just inspected by my local Ford dealership, and everything was running smoothly. 94,000. I noticed that during acceleration onto the freeway or on inclines, the vehicle would start to hestitate or stutter as I referred to it. I can barely discern a vibration in the vehicle, but if I have my foot just over the accelerator pedal, I can feel it vibrate in unison with the noise. just had this problem with a 2002 saturn sl2 turns out it was a fuse under hood labeled TRS I'm thinking it My 2007 Ford Edge hesitates/ jumps at 60-70 mph. Display as a link instead, CarGurus has 44 nationwide S-Series listings starting at $3,688. If i slowly and accelerate and do not push the pedal with force and try to keep the speed constant around 35 mph and then slowly accelerate from that speed it almost hesitates, feels extremely sluggish.. 1978 - 1996 Big Bronco - 30-40 mph hesitation - my 93 bronc 351 e4od runs and drives great but a few months ago i noticed that between 30 to 40 mph it sort of hesitates like it doesn't know whether to shift or not does anyone know what this might be? I don't think it is a transmission issue as the transmission will shift with no affect on the shudder. No code. Is there any downside to having two gas filters in a fuel system? Sign in or register to get started. If you have not cleaned your fuel injectors for a long time, then theyre probably corroded with carbon deposits or other debris. Jeff1104 a sticky valve . I have to shut off the engine in neutral and start again for it to move for a while and the same cycle happens again. 94,000. How to fix engine hesitation during acceleration. Camera Tripod: https://amzn.to/2Jwog8S6. There's a wealth of information to be found in what you get from it. Could be some debris in the secondary jet. Once the exhaust is supplying HEAT the sensor will provide good outputs. I have a 2014 vw tiguan and it seems to be hesitating only when its hot outside (85+ degrees) it will trip a check engine lean code but if I clear it and drive during cooler temperatures it drives perfect. Scotty Kilmer, gives you a chance to win a car product, by entering in this weekly giveaway. Once Im going faster or slower it stops. This can be a chronic problem, or it can only last a few seconds before the transmission works properly again. If you can still snap the throttle wide open & the tach responds appropriately, it's not the cats. My mustang hesitates 40mph and gives me hill starts assistant not available ! Car Jerks When Accelerating: Causes and Fixes - Rx Mechanic A clogged fuel filter can cause the engine to get too low fuel pressure or cause a clogged fuel injector. Any ideas or things to look at would be appreciated. An engine hesitation is an interruption of continuous power during acceleration. If this is the case, it means something has gone wrong with the car that makes the engine or transmission computer think it needs to run a really conservative calibration to protect the powertrain. I could see a faulty O2 sensor leading to a failed emissions test or lousy gas mileage but dramatic engine mis firing at a narrow band of speed seems something other than fuel trim is at fault. Tool giveaways every Monday to help you with your own car projects. Lexus # 89465-50130 / Denso OEM # 234-4630 / Denso Universal # 234-4209 / Bosch OEM # 13632 / Bosch Universal # 15733, Bank 2 Sensor 2 - Passenger side (rear) near catalytic converter. The mass airflow sensor, also known as the MAF sensor, is connected to the air cleaner. If Hello - from your symptom description, you have a worn out or damaged Constant Velocity joints (https://www.yourmechanic.com/article/is-it-safe-to-drive-with-a-damaged-cv-joint) on one or both front axles. I just recently acquired the car from a friend of the family. Are you currently in the car market and getting discouraged by high prices? A faulty ignition coil can cause the engine to misfire and hesitate under load. replace if needed . I'm still thinking it could be the fuel pump or the crank and/or cam sensor. Make sure youre putting the correct octane in the vehicle. I had my throttle body cleaned, spark plugs replaced, wires replaced, had my driveline completely checked because at first it felt like a vibration but it is different. 1. Hey guys, went out and purchased a clear filter like Rudi posted up. The engine will continue to rev as the car tries to accelerate above that speed, but the car will not be able to shift into gear for further speed. seemed to go from constant to intermittent. A pop and hesitation is likely a backfire. Car Hesitates When Accelerating Uphill? (4 Known Causes) - Auto Care Aids I feel it if I accelerate quick or cruise, and feel it more when I coast. Can you help diagnose? Thank Heavens for my wonderful mechanic who found and fixed this! How to Fix Car Hesitation, DIY with Scotty Kilmer. I am truly stumped. You'll get info from other sensors, as well, like the MAP. Saturn 4 door stick , 1.9 . The only way I know to test those is to heat the element in our oxygen rich atmosphere and test for the output voltage to be in the proper range. It's frustrating to say the least! I had not tightened a clamp enough around the filter/pump area after replacing my entire fuel system. I would suggest having a professional from Your Mechanic come to your home to diagnose your mass air flow sensor. For me the magic speed was 45 to 50mph. I have a 1978 FJ40 which I've owned since 2007. what things should i check first? Instead of going faster by stepping on the accelerator pedal, the speed will be reduced. I changed my fuel pump, throttle sensors, O2 sensors, If you give it WOT the stumble will not happen or if you do like a passing a car event, the problem . Bluetooth Scan Tool: http://amzn.to/2nfvmaD2. Car Hesitates and Jerks at 40MPH | DodgeIntrepid.Net Forums 2016 chevy equinox stalling after putting gas in the car? Forgot to mention, older cars like yours and mine will often develop vacuum leaks within the intake system. & atimes it works fine. This will cause your engine to lag, stumble, or hesitate. Engine starts right up and idles smoothly. But if this sensor is bad, then the wrong amount of fuel will get injected and cause engine hesitation. Its new in box and I'm happy to pass it on for less than I paid for it (I paid $65.00). Battery Pack Car Jump Starter: http://amzn.to/2nrc6qRAmazon Version of Fuel Pressure Tester: https://amzn.to/2pDXiDsMechanic Monday Official Rules:1. If it's less than 2k rpm, then you have the old programming, and should get the upgrade flash to the transmission (by a different dealership if need be). How to fix engine hesitation during acceleration. The b-body EGR was designed to work with a certain amount of back pressure and has a tendency to fail early when used with a cat-back. Right around 40 in what I believe were the car is shifting into 4th gear or overdrive the car starts to jerk (RPM's do not fluctuate/MPH do) If I give it some gas at this point the jerking stops but may return at higher speeds. this issue started when I had about 97000 miles and has gotten worse. Itd be best to bring your car to a shop you trust for a diagnosis. If still having issue after that let me know. Common Sense3. Are there any codes stored? Id take it back and have them double check their work. its worse when car is warmed up and reaching over 40mph Asked by Guru94BPVD Sep 12, 2020 at 04:13 PM about the 2017 Hyundai Elantra SE Value Edition FWD. Specifically, it will tell you what your TPS values are, then you can compare that to what they should be. If you're driving 40 miles per hour and think the transmission might be going bad, check for these several symptoms. I unhooked the old filter and I could not believe the junk that came out of it. Have you taken it to a local mechanic for an inspection? Not sure whether the procedures are applicable across all 1st gen models, though. How many miles? Not just one plug like three on pass side maybe one on other side .. now not smoking so. We changed spark plug, fuel filter, transmission fluid, engine oil, engine filter, and clean throttle body, change air flow sensor. My Toyota Corolla Sport 2003 model started hesitating while at speed, I consulted mechanic and they change fuel pump, filter MAF, check the throttle position sensor, its like its not working, I have to start twice unlike before.. what should I do? In your shoes, I would delay doing the fluid replacement stuff until after doing the basics and then continue hunting the sputter/bucking problem. If I tried to give it gas the sputtering became more noticeable and it seemed to lose power, although it never stalled. As others have said, lack of fuel. I recently wrote an article on limp mode, which is due to be published soon. Took the car to the dealer to have it . 1) Either transmission chooses wrong gears around 30-40 mph speed or something else, but car jerks sometimes significantly. The Fora platform includes forum software by XenForo. Flat, hill, doesn't matter. 1970 FJ40 Grey, 4 inch lift, Winch, Aussie rear, ARB front. This time more frequently and with some stalling. The The 2011 Mercedes-Benz ML450 Hybrid is Mercedes' first hybrid SUV. I've been dealing with this issue since last week. Paste as plain text instead, He has also studied martial arts since 1990 and has worked as a licensed security specialist. Let's Jump In! Sounds like it does not like the autozone tps sensor. Just wanted to make you aware of a potential problem, and to include it as part of your search. Low Speed Hesitation | Traverse Forum

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