looked at that yet? ", Now I need help and I am not sure if I should start a new topic or not, This is related to error code 47 in traction control (When idle switch is ON, sub-throttle position sensor signal is 1.45V or higher), Any ideas if that means that I should replace the sensor or it can just be adjusted, Yes you are right but it seems that by chance the sensor itself was also out of order. The vehicle has a stumble like a misfire(I think anyways) when driving. Our technicians tell us this condition is commonly caused by a failed automatic transmission torque converter. http://www.g6performance.com/forum/showthread.php?t=22038. I just recently purchased my 00 Focus SE with 96,xxx mi. Bad spark plugs, sensor failure, and bent valves can all cause engine loss of power, thus . When I apply throttle it hesitates and stumbles. the heater is only used during initial engine start up. 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). Classifieds - Engine/Transmission/Transfer Case, BJ42 | FJ43 | BJ44 | FJ45 | FJ45LV | HJ47, North American Clubhouses - Central Region, CA.AB- Rocky Mountain Land Cruiser Association, CO/WY- Horsetooth 4 Wheelers Cruiser Club, TX- Lone Star Land Cruisers - Austin Chapter, TX- The White Trash of the Elwood Chapter, CA.BC- Okanagan-Similkameen Land Cruisers, NV- Battle Born Cruisers of Northern Nevada, Vendors: Accessories - Electronics - Recovery, http://forum.ih8mud.com/forums/pa-keystone-cruisers.77/. 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. Check plugs / wires , it may have Sounds like your car is entering limp home mode. Well, you gotta first check the basics. You can post now and register later. If you have not cleaned your fuel injectors for a long time, then theyre probably corroded with carbon deposits or other debris. what things should i check first? So now comes the task of draining and cleaning the gas tank. The winner will receive a reply to their originally posted comment in the video and will also be announced in a newly posted comment by Scotty around Sunday 9 am CST. Will try and let While driving the vehicle at constant speed (from 20-40 MPH) the vehicle begins to jerk upon acceleration. I changed my fuel pump, throttle sensors, O2 sensors, It doesn't happen all the time and doesn't matter what kind of incline I'm on. Also, a loose motor mount, or rear diff'l mount, might result in a tugging feel due to the resulting "in and out" action of the lockup clutch, at those speeds. I put my fuel pump direct without a return pipe. All 4 are the same sensor its just the cable lengths which are different. Content will be removed if CarGurus becomes aware that it violates our policies. If there is a problem with your ignition system, such as with your spark plugs, rotor, or wires, then your engine will lose power at inconsistent times. CarGurus has 44 nationwide S-Series listings starting at $3,688. which of the 4 wires to connect? If you are still having trouble, From what you've described, it sounds like you have a head gasket leaking into the engine cylinder and then out of the exhaust. Powered by Invision Community, Lexus LS400 / LS430 / LS460 / LS500h / LS600h Club, Hesitation (Misfire) When Cruising At 40 To 60 Mph. Started March 4, 2021, By 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. No code. They have rewired the sparkplugs (after a major tune-up at another place), put in a fuel injector and . When a car starts jerking as you accelerate it, there is undoubted that it's usually a sign of an impending issue. 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. I tested mass air flow harness and I get 6.1 volts at PCM wire. How to stop car hesitation. Sure hope not but seen it happen on other cars. Is your question about how to test the oxygen sensor? just had this problem with a 2002 saturn sl2 turns out it was a fuse under hood labeled TRS In any case, you will likely find the problem relates to an imbalance in fuel and air mixing in the chamber. 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. 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. Im not sure. 45 mph it sputters It has been a work in progress, and around April I finally got it running after rebuilding the carb. Clogged fuel filter. Idles a little rough at times as well. Recall the primary O2 sensors are to trim (fine tune) the fuel map. Good work ehabmarco. 1,520 Great Deals out of 20,946 listings starting at, Car jerks when accelerating between 40 & 50 mph. hesitates when cruising at 40 to 60 mph. When does it happen? JavaScript is disabled. Here's an excerpt on the various sensor cross referencing (of part numbers): There are four O2 sensors in the LS430. It was the plug and wiring for the plug. 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. The contact stated while driving approximately 40 mph, the vehicle began to shake and decelerated to 10 mph independently. This condition can cause dangerous situations in heavy traffic when drivers behind expect continuous forward movement. I have the same thing on mine but hasnt changed with all new coils and plugs. I'm having the same problem and being discussed in another thread. Again no improvement when driving. Could this be caused from a clogged cat? My car hesitate when you start and start driving it does not move then after a jurk it moves. I assumed that once the ECU detected that one of the sensors was faulty it simply relied on the opposite for fuel trim corrections/adjustment. My 2001 Acura TL is starting to hesitate when accelerating, then starts slowing down. Tighten gas cap / Any codes? Amirkade you posted. Timing could be out. 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. 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. This obviously means we are imagining it, NOT. help please! WHEN CODES COME BACK IT STARTS TO HESISTATE AGAIN. Affiliate. If so, I can post the diagnostic procedures from the '92 Repair Manual. I had not tightened a clamp enough around the filter/pump area after replacing my entire fuel system. would replace it for $3500 it was simply 2 $1.39 fuses. gas mileage has also tanked. The fan motor itself is also a possible and common failure point. . I have a 2005 Ford Focus Wagon and it does the same thing! Engine starts right up and idles smoothly. My computer for editing / uploading: https://amzn.to/2uUZ3lo7. Cheap Scan Tool: https://amzn.to/2D8Tvae3. I ran Gumout through the gas tank, changed plugs, wires as well installed a brand new EGR. The winner will be chosen at random.10. that I should have all the fluids flushed and replaced soon. Thanks for the thoughts and suggestions. If it is just a bit of dirt or some moisture, then the best thing to . It only occurs while accelerating between 40-45 mph. Ecu not sending signal to spark plug harness? I bought it Have you checked the spark plugs? dentist tool you can get at autozone or Have no idea why. (https://www.yourmechanic.com/services/coolant-is-leaking-inspection) I would recommend having a cooling system pressure test performed on your vehicle by a qualified technician. The The 2012 Mercedes-Benz ML350 BlueTec is a safe vehicle that offers many standard features such as solid wood accents, thick leather on the seats, and memory buttons to save your seating position. The spark plugs may be dirty or worn. Same symptoms as you describe. Run sea foam through gas tank and I think moving you to the technical section, should get more views there. Low fuel pressure will cause the engine to run very leanly, and therefore it may cause the engine to sputter. 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. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register. If that doesnt do the trick, you may need to have them professionally cleaned or simply replaced with new fuel injectors. See Also: Drive-By-Wire Throttle Pros/Cons. Saturn 4 door stick , 1.9 . I'm still thinking it could be the fuel pump or the crank and/or cam sensor. The f-body EGR was designed to work with a low restriction exhaust and thus will typically last longer. This obviously means we are imagining it, NOT. 2CarPros: Car Acceleration Questions and Answers. (Manifold Air Pressure Sensor) any chance you At that moment, a bad transmission can cause the car to jerk, and that could be accompanied by a loud "slamming" noise. It is also common to experience issues when switching from park to drive for transmission problems. To help you pinpoint the cause of this problem, below are 10 of the most common causes of engine hesitation while driving. 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. Any codes? Why, if you think it through, should it be otherwise. The hissing sound you are hearing is most likely a source of a leak in your cooling system. Misfiring might be occuring. When it does it, it does it both when I'm accelerating and decelerating. Starting with cleaning the egr valve. would it benefit to replace the air induction system with an after market intake, or just go with a standard air filter replacement? year amongst other things. 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 The vehicle may even stumble entirely during these seconds. andbeyond, Nov 16, 2017 #20. I have changed the spark plugs. 1) Either transmission chooses wrong gears around 30-40 mph speed or something else, but car jerks sometimes significantly. 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? My stabilize traction control light came on but went off now check engine light is on and my car hesitates when I step on the gas and go up a hill I got a 2011 Chevy cruze.