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There's a wealth of information to be found in what you get from it. Get a chance to show off your own car on Sundays. Any codes? Used to happen to me after wheeling when I would shake all the rust particles from the bottom of the tank. The car will jerk real bad when driving at a steady speed and also when slightly accelerating. Youll probably have to take it to a shop to get that diagnosed. When the engine is first started cold it is running open loop and the O2 sensors aren't used at all. An engine that hesitates when accelerating is either sucking too much air, not getting enough fuel, or misfiring. It happened to her again yesterday. ESBJr, have you ever found out what the problem The radiator fan operates on a fused circuit with high amperage relays to drive them. When this happens, the traffic lights indicator works abnomally (blink faster). I feel it if I accelerate quick or cruise, and feel it more when I coast. Haliuna 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. Why don't we agree to call the described symptom as engine "tugging" rather than "misfire" which could be misleading. But don't worry because this symptom also has a solution like other car problems. I'm thinking it Could still be a carb issue even after rebuild. It's frustrating to say the least! Started February 14, By Will try and let 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. (Engine Oil Viscosity Explained), How to Debadge Your Car (In 3 Easy Steps), Should I Cover My License Plate Online? I have a 1996 Saturn SC2. 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? Question type: Maintenance & Repair. A car's transmission is vital for the car to function properly. which of the 4 wires to connect? Also having this issue, wondering after doing everything except a map sensor could the generic TPS be a thing? Thank you for your fast reply. November 27, 2011 in 90 - 00 Lexus LS400, I am sharing my experience with this chronic problem of misfire at a certain speed when cruising that I see repeatedly in this forum, First I admit that this forum helped me a lot to find the cause of my problem but unfortunately after spending lot of money in changing many parts, First thing I want to say is that many issues can lead to the same symptoms of hesitation or misfire between 40 to 60 mph, Hesitation at this speed does not mean that the engine is only hesitating at this speed and THIS IS THE TRICK, The misfire is clearly felt at this speed because the torque converter clutch is engaged that means the engine and transmission are considered as 1 unit so any slight misfire in the engine will be felt in the transmission and this is happening only when cruising. The car does hesitate when at 35-40 mph and above and it response very poor when press accelerator slowly and steadily. JavaScript is disabled. At exactly 40 mph. I' have also changed the EGR but that did not help Must be 18 years or old at the time of entering this giveaway OR have your parents permission.6. Once this started to happen I immediately turned around and went home. BEST Place to SELL 1994 LS400 LEXUS with 166,000+/- miles. The winner will be required to give Scotty their full name and mailing address to receive the prize.12. I changed my fuel pump, throttle sensors, O2 sensors, if I was guessing & it had no code I would run some Techron through the tank. Hesitation. Any offensive, obscene, or lude comments will be ineligible to win the giveaway.8. The reason why car hesitates when accelerating uphill is simple! Make sure youre putting the correct octane in the vehicle. The winner will be chosen at random.10. My car was jerking as well. in the engine (youll need a pick set like a This may cause a hesitation, loss of power or jerking reaction when this sensor is malfunctioning. Started September 12, 2022, Lexus Owners Club of North America Car hesitation while idling. 2016 chevy equinox stalling after putting gas in the car? The spark plugs may be dirty or worn. Affiliate Disclosure: We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites. Doesn't appear to be overheating, and temp gauge seems to be working fine. Isabella83 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. Any codes? Today, I will be better than I was Yesterday, but not as good as Tomorrow! It would be best if you replace or clean the dirty air filter to stop this problem. The '90 and one of the '92's are now off the list. It's FREE! 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. This could be accompanied by a hesitation in the motor when driving. Have you checked the spark plugs? (Kirchoff's third law), Measuring is knowing.. but only if you know what you measure. A bad transmission often will kick violently when trying to change gears. 1 Answer Engine V6 is hesitating when accelerating over 40 mph Engine hesitates and almost misses when accelerating over 40 mph. Im not sure. My 2017 Hyundai Elantra is hesitating shifting right. A catalytic converter is responsible for reducing the amount of pollutants that exit out of a car's exhaust. Id visit a mechanic to get it checked out as soon as possible. Just for giggles try putting in a water-remover fuel additive to the gas tank and see if there is any difference. I am truly stumped. A pop and hesitation is likely a backfire. Normally under these circumstances Id look into normal causes such as Coils, Wires, O2 sensors, Injectors, Fuel pump/filter, etc. If still having issue after that let me know. About a month or so ago, the car started hesitating, almost a sharp jerking, when it gets to around 40-50 MPH. mechanics. Its the Bank 1/2 post CAT sensor. Common Sense3. 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 . It also makes noise when the cars sitting at a light or stop sign. weather permits, I'll be checking the engine with it. The winner will be required to respond to Scottys comment within 24 hours or their win will become void and a new winner will be chosen at random. Is your question about how to test the oxygen sensor? Yes it is an automatic. So now comes the task of draining and cleaning the gas tank. http://www.g6performance.com/forum/showthread.php?t=22038. 2CarPros: Car Acceleration Questions and Answers. 2) O2 sensors will effect your fuel mix and could cause too rich or lean a mix that will create problems but doubtful it would be isolated to a narrow band of speed like you saw. I know my transmission is bad but is that all? Replaced the rear differential's front mounting cushion to clear up the problem. We took the car to the dealer where we purchased it and they were unable to find anything because there were no codes present. Well a few more miles down the road it started again. My car stalls when Im getting ready to pull of at a light and when I hit the gas I have hit hard for it to go and I have my fuel pump changed I have transmission leaks they were fix it just started doing it a few minutes and my car knocks while sitting a light and rattles when I take off sometimes, Any answers you described my issue to the T, I was wondering why does my car lose power/jerks and hesitates to accelerate when Im close to the E Ill have 60 miles of fuel left and it starts to act weird. Thats about the speed when a bad fuel pump gives up. It will accelerate past 40, but seems to have trouble. Car hesitates when accelerating. I put on a new fuel pump and still having the same problem. Never any sponsored content, just the truth about everything! I have a Denso 234-4167 Oxygen Sensor that I ending up not needing. Vac leaks can cause or contribute to the symptoms you are having. It will definitely be cheaper to have a proper diagnosis than to fire the parts cannon at the problem. It did seem to help with the cars overall performance. Very rarely it jerks so bad . If I should need to change out the metal fuel lines, does anyone know the correct size for rubber tubing to connect from the gas tank forward? That rules out 2, 3, and 4 of your theory. It may not display this or other websites correctly. The frustrating thing about the diff'l mount failure symptom is that there was no CEL at all. We have a 2008 G6 with a V6 engine. Post Reply . Could be some debris in the secondary jet. It has started bucking under load, feels like it is losing a cylinder when accelerating and I get a sweet smell like kerosene. Hi Everyone. If I start below those RPMs or above there it shifts and goes fine, no bogging down either. The jerking does go away read more Mike V. technician Subaru and Nissan factory t. 35,628 satisfied customers As you go down the road it has a slight jerking action. It is a 350 it did over heat but head gasket good no water in oil or over heating . My Honda Pilot 04 hesitates while picking up after I had slowed down a bit. Your link has been automatically embedded. Car hesitating while driving. 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. If press hard it downshift, revs high and pull but it is inacceptable driving style. Usually due to rust clogging the fuel filter because the tank if full of rust particles trying to make their way into your carb to clog that. 45 mph it sputters also the car seems to shutter or almost feels like i am going over small bumps in the road even though its completely flat. I put my fuel pump direct without a return pipe. She kept it well maintained from what I was told. The fuel filter 's job is to filter the fuel going to the fuel injectors and then enter the engine. Take off exhaust manifold and clean the You can post now and register later. As the car approaches 40 mph, the RPMs will increase in the engine. Yes my question was about testing the oxygen sensor, it is a 4 wires type (2 black, 1 blue, 1 white), it would be great if you can post it, About the other trac code error 47, it was a little adjustment that needed to be done to the traction control sensor position and the code now is cleared. Hesitation/Stuttering While Driving Between 40-50 MPH vicjrblue Member Posts: 1 January 2016 edited January 2016 I purchased my Torrent October 2014 and it had approx. If you have an account, sign in now to post with your account. I recently wrote an article on limp mode, which is due to be published soon. Mechanics computer says one of my engine coils needed to change and so I changed all of them. Hey guys, went out and purchased a clear filter like Rudi posted up. I have a 2012 traverse. 94,000. At this point in time, I'm thinking it could be my 1. Only one comment per entrant is allowed and more than one comment will not increase your odds of winning.5. Btw jeep likes NGK ZFR6F-11G spark plugs only. 2014 Ford Escape with 88k miles. Just make sure nothing metallic can touch both lugs at once to avoid a short, and possible fire. If I tried to give it gas the sputtering became more noticeable and it seemed to lose power, although it never stalled. They definitely needed replaced, but that still didn't fix the bucking issues. With his money, I would think he would be more of a Bentley man. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. There are a lot of things that can cause this. How to fix engine hesitation during acceleration. Its probably best to have a local shop take a look at the vehicle in person. Drives fine otherwise. 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. Car runs great between 0-40 mph and from about 50 mph on up but the car jerks while eccelerating between about 40 - 50 mph. This along with using 87 octane or higher gas solved the issue entirely. My mustang hesitates 40mph and gives me hill starts assistant not available ! Check plugs / wires , it may have It appears that if you had "read" the actual code it would indicated an open O2 sensor HEATER, not the sensor itsself. either. If any of the vacuum hoses around your engine become damaged or worn out, you could experience air leakage from them. Thanks to this article I will also try cleaning the MAF but It still does it with the air cleaner disconnected but it is worth a try. Problem is more noticeable on hills/slops. If any of the components in your fuel system stop working correctly, like your fuel injectors, fuel pump, or fuel pressure regulator, then your engine wont get the proper amount of fuel it needs for combustion. This requires closer diagnosis. Camera Tripod: https://amzn.to/2Jwog8S6. Car advice. Engine starts right up and idles smoothly. dentist tool you can get at autozone or I have changed the TPS, coil, coil igniter/module, plugs, cap, wires, rotor. Common issues include: I cleaned the carb and put some sea foam in it ..noticed have oil on spark plugs on threads and getting down into chamber . Actually you can probably get your purchase price back very easily w/o reselling. around 40 mph. I think plugs are OK. Started 4 hours ago, By Our certified mechanics come to you Backed by 12-month, 12,000-mile guaranteeFair and transparent pricing. You cannot paste images directly. I checked the PCV and it was okay so I reinstalled it. This is what it means when the car engine hesitates. for an ignition miss. Car engine hesitation is a noticeable problem that can occur as youre driving. A clogged fuel filter can cause the engine to get too low fuel pressure or cause a clogged fuel injector. Flat rate pricing based on labor time and parts, Hand-picked, community-rated professionals, Trusted mechanics, rated by thousands of happy car Only happens in the top gear around 40-45 mph. They were worn and corroded. The car has started jerking around 40-50 mph my wife said the a few weeks ago. Robert, I have not yet found the answer. Also, you should buy a rebuildable / serviceable fuel filter. 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.. If the oxygen sensor is not working properly, then the proper air and fuel mixture cannot be achieved. Changed Fuel filter. Codes won't tell me and the mechanics I've been to 13 Answers 805 richksiny answered 7 years ago i would say fuel filter , pump as well. If you purchased it locally and do not have the receipt, just take it back and they may have the sale on record. The problem happens only around 20-24 MPH and around 40 MPH give or take a few MPH. Could be bad gas or an unrelated issue. Jeff1104 Any suggestions? To quote a phrase, "If you eliminate the impossible, whatever remains, however improbable, must be the truth! A forum community dedicated to Ford Focus owners and enthusiasts. Battery draining and charging - 2007 Jaguar XK. It can perform light off-roading tasks while still being able to tow a good amount of weight. Upload or insert images from URL. This should be checked out by a professional mechanic immediately to avoid being stranded or causing further damage. Hello there, a variety of faults that can cause your 2001 Honda Civic to overheat (https://www.yourmechanic.com/article/can-a-car-battery-overheat-in-hot-weather). The throttle position sensor monitors the throttle valves position and then relays this information to the engine control unit. Cheap Scan Tool: https://amzn.to/2D8Tvae3. Changed my spark plugs new valve cover gaskets oil on dip stick looks clear though had fuel in oil but tried igniting the oil on dip stick , nothing . Car hesitation. I took my car to the dealer (after they fought me on it) to find out that it was the spark plugs (whicjh BTW arent covered under warranty, so if you dont have a warranty it can de pricey if it's more than one plug.) Fuel mileage is bad now as well. Im not sure I understand the question.