We took the car to the dealer where we purchased it and they were unable to find anything because there were no codes present. This giveaway is open worldwide.7. 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? I took my Toyota highlander 2003 for servicing, plug changed, injector nozzles washed, & MAF cleaning. It will accelerate past 40, but seems to have trouble. carbon out of everything especially the ports ;), Yes before changing the O2 sensor, The MAF/IAT sensors had been cleaned AND even changed without any improvement, One more thing I want to mention is that the O2 sensor was completely dead (no reading for any resistance), I knew that this sensor was faulty (I had a CEL) but I could not imagine that this is the reason of misfire, that's why I left it to be the last option. Car hesitation. This obviously means we are imagining it, NOT. This is what it means when the car engine hesitates. 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. What is your rpm at 40 mph on a level road? 4k Camera: https://amzn.to/2HkjavH4. Codes don't solve everything. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); Mailing Address:9169 W State Street, Suite 2867Boise, ID 83714. was? When the engine reaches operating temperature both Hello, thanks for writing in. But this too would be noticeable at many speeds. Especially around 45mph. 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. If press hard it downshift, revs high and pull but it is inacceptable driving style. weather permits, I'll be checking the engine with it. Then you will experience engine hesitation which is most noticeable at low RPM. Several years ago, having a Olds Intrigue 3.8 L, that smillar jerking effect happened and around this speed, car on top gear. Ecu not sending signal to spark plug harness? You might need to replace your MAF sensor which is your mass airflow sensor and definitely check your fuel rail and fuel injectors. 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. As others have said, lack of fuel. Take off exhaust manifold and clean the And to make it worse I had to sell a bunch of my tools when I moved so I dont have the same diagnostic abilities I once had. Clear editor. To help you pinpoint the cause of this problem, below are 10 of the most common causes of engine hesitation while driving. Our technicians tell us this condition is commonly caused by a failed automatic transmission torque converter. Zeus01 A pop and hesitation is likely a backfire. It doesn't happen all the time and doesn't matter what kind of incline I'm on. The f-body EGR was designed to work with a low restriction exhaust and thus will typically last longer. Now, I do know that This was traced back to a light film of corrosion on a coil wire. Just wanted to make you aware of a potential problem, and to include it as part of your search. We changed spark plug, fuel filter, transmission fluid, engine oil, engine filter, and clean throttle body, change air flow sensor. Turns out the spark plugs and wires were just worn. I took several days before reseting the CEL "took". Could be bad gas or an unrelated issue. When it does it, it does it both when I'm accelerating and decelerating. Just a hunch. This will cause your engine to lag, stumble, or hesitate. Let me know and I will post them. Anyways, I took the kids for a road trip down to the Outer Banks in NC. When By If so, I can post the diagnostic procedures from the '92 Repair Manual. Unfortunately Im still at a loss for answers and I am darn close to rolling her down the quarry lol. This helps the engine control unit determine the right amount of fuel to inject into the chamber. I have changed the spark plugs. We were told car knocks real loud, and shifts hard to the point it jerks me back real hard. Depending on what carb you have, there may be a small screen where the fuel pipe attaches to the carb at the float bowl. They definitely needed replaced, but that still didn't fix the bucking issues. If any of the vacuum hoses around your engine become damaged or worn out, you could experience air leakage from them. Hyundai Elantra 2012 MAF (Mass Air Flow) sensors Aug 22, 2018. I replaced the spark plugs last night after reading your first post Marde. Amirkade Here's what you might discoverand what you can do to fix the problem: Dirty air filter. How to fix engine hesitation during acceleration. (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. Fuel System. My next step will probably be to install a new fuel I have a 2012 traverse. I had suspected such for quite some time and just recently tested the theory by heating a new sensor on an electric stove element. It goes away when I get out of that window of speed or push OD off. Weather seems to have an effect though. When the engine is first started cold it is running open loop and the O2 sensors aren't used at all. Actually you can probably get your purchase price back very easily w/o reselling. 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. (Manifold Air Pressure Sensor) any chance you For me the magic speed was 45 to 50mph. Im not sure I understand the question. I tried to nurse it home as much as I could but having the kids with me and traveling on the highway I felt the best thing to do for our safety was to just stop. Are you asking if oil on plugs could cause a bad fuel pump? Learn how to fix your car and how it works. What can I do with my Toyota Corolla sports,Ive changed so many things like fuel pump, injector, spark plug,fuel filter yet it still hesitate..help the helpless. TCS light stays on for days, and then comes off for like a week, then comes back on for days again. Car has about 47K miles and has had all maintenance performed. Any codes? Davidson has written articles for various websites. Replaced the rear differential's front mounting cushion to clear up the problem. To help you pinpoint the cause of this problem, below are 10 of the most common causes of engine hesitation while driving. One thing is for sure, you wont be able to drive safely if your engine keeps hesitating while youre on the road. 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. Prior to EFI there was no feedback loop on fuel trim (remember those things called carburetors?). I have a 2015 fusion 1.5 turbocharged after getting gas, once car is killed and I go to crank it again the car goes to shuddering and losing power. I have a 1978 FJ40 which I've owned since 2007. This one stayed. It never stalled and otherwise drove great. Nissan sentra 2012 My car hesitate on red light. Ethanol vs Non-Ethanol Gas (Which is Better? Could be some debris in the secondary jet. I had it flashing CEL for 10 seconds but it never stored a code (trust me, I have the stuff to find out). Fiberglass tub. I am going they the same issue with my sons 99 Good luck, I'll keep andbeyond, Nov 16, 2017 #20. It is usually the result of a problem with the air and fuel mixture within the combustion chamber. 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. (This after we changed the fuel filter.). Flat rate pricing based on labor time and parts, Hand-picked, community-rated professionals, Trusted mechanics, rated by thousands of happy car Any ideas? Yes, it is safe to attach a battery charger to the trunk power lugs. If you're driving 40 miles per hour and think the transmission might be going bad, check for these several symptoms. However, there is a long list of other reasons which could be the cause of this hesitation problem too. When was the last time the spark plugs were changed? seemed to go from constant to intermittent. This is known to cause engine hesitation problems, so it should be addressed. It is basically stock and has been desmogged. 1 Answer Engine V6 is hesitating when accelerating over 40 mph Engine hesitates and almost misses when accelerating over 40 mph. A faulty ignition coil can cause the engine to misfire and hesitate under load. Have cylinder compression checked . What could be the cause? The odds of winning are based on how many people enter the giveaway.9. Change it out to a clear plastic one temporarily while you're sorting it out to see what kind of crap is coming out of the tank. 2016 chevy equinox stalling after putting gas in the car? If this sensor goes bad, the engine control unit will be unable to keep the right balance in the mixture. I don't think it is a transmission issue as the transmission will shift with no affect on the shudder. Sounds like it does not like the autozone tps sensor. It is possible for you to mistakenly think your gears are slipping when in fact it is your engine hesitating. We're a forum community dedicated to the Pontiac G6. EPB, BMS for Specific Vehicles, Software Lifelong Free Update, NOT Support All Cars $199.00 . It can perform light off-roading tasks while still being able to tow a good amount of weight. Put the clear filter on and we are up and running past 40-45mph without the sputtering, hesitation and stalling. If you can use a scanner live data check your oxygen sensors especially the upstream sensors can cause all kinds of problems and sometimes won't throw a code ! Car hesitating while driving. We'll see how that goes and move forward. 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.