It will accelerate past 40, but seems to have trouble. Several years ago, having a Olds Intrigue 3.8 L, that smillar jerking effect happened and around this speed, car on top gear. Red, Gozzard Fiberglass tub. The winner will be chosen at random.10. Thank you for your fast reply. Codes don't solve everything. My Honda Pilot 04 hesitates while picking up after I had slowed down a bit. While not optimal from an emissions perspective the cars still ran fine. Any type of miss, or lean condition, like a clogged injector will cause a code to be set. 1) Bad Throttle Position Sensor The throttle position sensor monitors the throttle valve's position and then relays this information to the engine control unit. This one stayed. Camera Tripod: https://amzn.to/2Jwog8S6. Now, I do know that Low fuel pressure will cause the engine to run very leanly, and therefore it may cause the engine to sputter. hesitates when cruising at 40 to 60 mph. Fuel filter won't wait until you hit 40mph for it to act up, fuel pump might, are you SURE you routed the vacuum hoses properly? 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 have a 1978 FJ40 which I've owned since 2007. My next step will probably be to install a new fuel You must log in or register to reply here. If you can still snap the throttle wide open & the tach responds appropriately, it's not the cats. You could check basic things like spark plugs and wires, injector functionality, and engine air filter cleanliness. The mass air flow sensor is a unit in the intake system that monitors air intake as it is mixed with fuel prior to being injected into the motor. Best bet would be to take it to a local shop to see what they would charge you to replace the plugs. went to dealer. Nothing else has been done since I've had it. It did great going down there and throughout the week that we stayed. The hesitation around 40 and 50 would be in keeping with that theory. Car hesitating while driving. Must have been his 'beater' car. necessary and make sure pcv valve is good A good scan tool might reveal something but it may require that the car be hooked up to diagnostics while the actual event is occurring, so that data from various sensors and modules can be captured in real time and analyzed by a skilled mechanic. Posted by Anonymous on Mar 16, 2015 Answer Pierre Laplante Ford Master 2,061 Answers Posted on Mar 16, 2015 Open Questions: There is a shudder under acceleration that starts at 30 mph and will continue to 40 mph were it goes away. The car does hesitate when at 35-40 mph and above and it response very poor when press accelerator slowly and steadily. If press hard it downshift, revs high and pull but it is inacceptable driving style. Yours is a very difficult problem to diagnose without seeing the live engine data. Good work ehabmarco. . It may not display this or other websites correctly. I have a 1996 Saturn SC2. When the engine is first started cold it is running open loop and the O2 sensors aren't used at all. Weather seems to have an effect though. If that doesnt do the trick, you may need to have them professionally cleaned or simply replaced with new fuel injectors. This giveaway complies with all applicable federal, state, and local laws, rules, and regulations, including U.S. sanctions.15. Alpine s10" dual 2 ohm voice coil Subs in a ported box JBL GTO-14001 1500w amplifier, tint, stock everything else! Engine starts right up and idles smoothly. Jun 16, 2016. weather permits, I'll be checking the engine with it. Started September 12, 2022, Lexus Owners Club of North America His has none.yet! There are a lot of things that can cause this. Paste as plain text instead, Vacuum leak will affect idle before anything else and certainly not at 40-45 mph and nowhere else. Have a 1998 manual trans. All lights, chimes etc stay on but no acceleration. Additional questions welcomed. that I should have all the fluids flushed and replaced soon. I dont know, youre probably going to have to have a technician take a look at it and see if there are any other problems. Haliuna Post Reply . Saturn 4 door stick , 1.9 . Powered by Invision Community, Lexus LS400 / LS430 / LS460 / LS500h / LS600h Club, Hesitation (Misfire) When Cruising At 40 To 60 Mph. Mechanics have been little help to this This is what it means when the car engine hesitates. The car may be pulling timing for some reason when its hot. problem started the first day of new car purchase. Lol old_mopar_guy April 29, 2019, 10:52pm #9 The only thing your 09 Nissan has in common with a 99 Mercury is that they both have 4 wheels. It hesitates for a second and then takes off. Saturn Outlook we are looking at. I have a 1991 Toyota MR2 with a 2.2 liter engine and 5-speed stick. I was then told my throttle body needed to change and so I bought a new one. It will definitely be cheaper to have a proper diagnosis than to fire the parts cannon at the problem. Could it be a thing like the TC engagement going wonky? Will start on changing out the fuel filters and checking out the fuel pump with disassemble. (This after we changed the fuel filter.). Bluetooth Scan Tool: http://amzn.to/2nfvmaD2. totally fine. replace if needed . Battery Pack Car Jump Starter: http://amzn.to/2nrc6qRAmazon Version of Fuel Pressure Tester: https://amzn.to/2pDXiDsMechanic Monday Official Rules:1. No noticeable vacuum line cracks/breaks. wish to see you more in the coming days. At that moment, a bad transmission can cause the car to jerk, and that could be accompanied by a loud "slamming" noise. This is known to cause engine hesitation problems, so it should be addressed. Instead of going faster by stepping on the accelerator pedal, the speed will be reduced. Car hesitation while idling. Help? said it could be a . Do Not Sell or Share My Personal Information. Come join the discussion on performance modifications, accessories, troubleshooting, maintenance and more! Sorry, I find it a bit hard to accept that a defective MAIN O2 sensor in an engine with TWO sensors, would result in a lean misfire. don't seem to think the crank/cam sensors could be the culprit. 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. Fuel filter. I put my fuel pump direct without a return pipe. A bad transmission often will kick violently when trying to change gears. cant maintain a speed over 50 . Misfire is due to ignition, or lack thereof. It has been a work in progress, and around April I finally got it running after rebuilding the carb. How to fix engine hesitation during acceleration. You might need to replace your MAF sensor which is your mass airflow sensor and definitely check your fuel rail and fuel injectors. (Manifold Air Pressure Sensor) any chance you 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. How to fix car hesitation. What could be the cause? It seems more Torque converter lock than loading. They were worn and corroded. You are using an out of date browser. I would check all my connections, too. It looks like you're new here. Drive it long enough that way & a CEL will appear, prob. Any codes? Take off exhaust manifold and clean the Your vehicle could have dirty fuel injectors, a damaged fuel pump, a blocked catalytic converter, a faulty mass airflow sensor, broken spark plugs, or even an accumulation of moisture. Ignition, fuel system, vacuum, or torque converter issue would be my guess, but any of the above will set a code! When outside air goes into the engine as part of the combustion process, the mass air flow (MAF) sensor measures how much of this air is going in. Have you checked the spark plugs? The problem happens only around 20-24 MPH and around 40 MPH give or take a few MPH. 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? Are there any codes stored? If it happens mainly with acceleration, even slight acceleration, you may have a plugged catalytic converter. These are the f-body part #'s. About $65 for both solenoid and valve from Dal. To help you pinpoint the cause of this problem, below are 10 of the most common causes of engine hesitation while driving. but wouldnt that throw a code? But don't worry because this symptom also has a solution like other car problems. There are several reasons you might be getting backfires and hesitation. If your ECM is adjusting the engine to run too rich this could happen. It also makes noise when the cars sitting at a light or stop sign. Why, if you think it through, should it be otherwise. It is basically stock and has been desmogged. Changed Fuel filter. Cleaned that off and the problem went completely away. Getting ready to change the up-line O2 sensor(s) and then maybe the MAP if the O2s dont work. About a month or so ago, the car started hesitating, almost a sharp jerking, when it gets to around 40-50 MPH. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. Never any sponsored content, just the truth about everything! This time more frequently and with some stalling. Same symptoms as you describe. This helps the engine control unit determine the right amount of fuel to inject into the chamber. In your shoes, I would delay doing the fluid replacement stuff until after doing the basics and then continue hunting the sputter/bucking problem. After. what things should i check first? My computer for editing / uploading: https://amzn.to/2uUZ3lo7. My 2001 Acura TL is starting to hesitate when accelerating, then starts slowing down. I unhooked the old filter and I could not believe the junk that came out of it. (Engine Oil Viscosity Explained), How to Debadge Your Car (In 3 Easy Steps), Should I Cover My License Plate Online? I tend to agree. Have cylinder compression checked . We'll see how that goes and move forward. My car is a "beater" but now the problem has become a challenge. Itd be best to bring your car to a shop you trust for a diagnosis. Asked by Guru94BPVD Sep 12, 2020 at 04:13 PM about the 2017 Hyundai Elantra SE Value Edition FWD. Sounds like something got messed up at the last service, if those problems have only occurred since you were in the shop. The vehicle has a stumble like a misfire(I think anyways) when driving. the S series doesn't have a MAF but a MAP The 2 rear diff'l mounts are still in the freezer awaiting a nicer day. A partially clogged cat will act like a rev limiter. There are a range of reasons why your car is juddering when you accelerate. 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. I have done this before and it worked out beautifully. Step 1 - Check the ignition coils and spark plugs. The following problem occurred afterwards. The problem persist. Hesitation. The only issue was that the car would shudder pr even buck a bit ONLY at speeds around 40 MPH and ONLY when the accelerator was backed off of slightly and when an attempt was made to feather the pedal and maintain a steady speed. or Mass Air Flow sensor. The car will jerk real bad when driving at a steady speed and also when slightly accelerating. Over the years I have been reponsable for the care and maintenance of a '90 LS (a Bill Gate's trade-in), a '91 LS, 3 '92's and a '95. A car's transmission is vital for the car to function properly. The vehicle may even stumble entirely during these seconds. Thanks for the suggestions so far. The radiator fan operates on a fused circuit with high amperage relays to drive them. How to fix engine hesitation during acceleration. It's driving me crazy to figure out what it could be. We have a 2008 G6 with a V6 engine. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. Can you describe the hesitation problem in as much detail as you can? also the car seems to shutter or almost feels like i am going over small bumps in the road even though its completely flat. The ignition system is responsible for igniting the air-fuel mixture inside the engine to create the energy needed to propel your car down the road. Once Im going faster or slower it stops. Clear editor. 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. I have spoken to 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 heater is only used during initial engine start up. 2CarPros: Car Acceleration Questions and Answers. When this happens, the traffic lights indicator works abnomally (blink faster). Why your car may be jerking, bucking, hesitating, or shaking in town or at highway speeds! Again no improvement when driving. I think one of my spark plugs/wires/coils is bad but I'm not going to spend hundreds finding out which one until I get a code. It has started bucking under load, feels like it is losing a cylinder when accelerating and I get a sweet smell like kerosene. Any suggestions? Does the same thing while in gear and while accelerating as it shifts to the next gear it hesitates each time it shifts through all four gears. Ever since they replaced the plugs everything works AMAZING and the car drives really smooth. Is your question about how to test the oxygen sensor? Clogged fuel filter. If you give it WOT the stumble will not happen or if you do like a passing a car event, the problem . Oct 30, 2005 I have a 91 RT TT Stealth, about 48,000 miles. Its loke being in the Car hesitation whi Shop the Scotty. No problems starting and traveling at slower speeds but once again 20 mins into the drive traveling between 40-45 mph the sputtering began. The hissing sound you are hearing is most likely a source of a leak in your cooling system. Display as a link instead, It doesn't happen consistently. This was traced back to a light film of corrosion on a coil wire. All 4 are the same sensor its just the cable lengths which are different. factor. Have a 1998 manual trans. Camry 5th and 6th Gen '02-'11, Solara '04-'08. This could be accompanied by a hesitation in the motor when driving. Im hoping not needing internal work .. wondering if oil on plugs could be cause faulty manual fuel pump 0 2 sensor ,dont hear any vacuum leaks.. just seeing if one those could be the problem before start tearing down to see if o ring or piston rings are causing oil to fouling my plugs .just with not smoking maybe just fuel problem not enough or coil not getting hot enough ? I just noticed when I am driving on the freeway about 65-70mph I can feel a hesitation, I hit the gas a little and it is gone. Timing could be out. Please see our. The reason why car hesitates when accelerating uphill is simple! 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 Even if you purchased it online, you might be able to get a store credit at a local retailer like Autozone, Advance, Pep boys, O'Reilly's, etc. they were not sure how to fix it. The car hesitate when i step on the gas. Can you narrow down when it hesitates? Just the other day it started bucking and sputtering around 40-45 mph while driving on the highway. Can you help diagnose? This happen with a Pontiac 6000 , 2.8 L. hey guys, same issue here, I have a manual tranny 06 gtp. A faulty ignition coil can cause the engine to misfire and hesitate under load. I don't understand why it drove perfectly that one time and I can't recreate it now. I'm going to try that next. Made with in Silicon Valley. If it happens once, it is likely to happen again, and the car should be serviced before the transmission is damaged further by wear and tear.