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Hyundai elantra 2013 bucking while accelerating Sign up here! Search this forum this category all forums for All words Any words Whole Phrase (search options) Auto Repair Home>> Automotive Repair>> Car Troubleshooting Nathancar New User Aug 30, 2022, 12:24 PM Post #1 of 3 (1381 views) Hyundai elantra 2013 bucking while accelerating Sign In Why does my car buck when accelerating, the rpm goes back and forth repeatedly if i maintain the gas pedal at acceleration but stops when i deacellerate. Usually occurs between 25-45mph and is worse if accelerating uphill. If i slowly speed up everything is fine and also drives fine when on the highway? Some background, i replaced the crankshaft sensor myself since i got an error code for it and that error code is gone now, also i let the car sit for too long without running it during winter season where it gets about 10-20 degrees Farenheit.. i let the gasoline sit for the duration. Didnt know better. Car is a hyundai elantra 2013. Any help is appreciated. Tried using fuel injector cleaner but dont think its helping at least not yet, only driven about 15 miles since putting it in. Tom Greenleaf Ultimate Carjunky / Moderator Aug 30, 2022, 1:46 PM Post #2 of 3 (1370 views) Re: Hyundai elantra 2013 bucking while accelerating Sign In You need a new a quality code reading again even if no light is on. Sitting for Winter alone 3 months is enough - each situation might cause real problems or not. IDK on fuel it should last that long without being the problem AND I'm guessing you've driven it a while since last Winter without a problem?? I would say this happens under load you said hills matter too is a load. BTW, codes don't mean run out and replace what they may say the issue is rather that circuit has an issue or notices it. Injector cleaners are a wild maybe if any do much it's SeaFoam but don't use much as it says on the label it's nasty strong cause another problem if overdone. * How long did it sit and did it run OK after that in a few weeks were back to Fall as you know so that's a while ago. * I too suspect an injector issue but don't rush it and toss one or more it's picking on probably one. Codes and please post the #s would help the most with this for us, T Hammer Time Ultimate Carjunky / Moderator Aug 30, 2022, 3:53 PM Post #3 of 3 (1365 views) Re: Hyundai elantra 2013 bucking while accelerating Sign In These are pretty typical symptoms of a bad Mass Air Flow sensor. It won't necessarily set a code. Make sure there are no disconnected hoses or leaks in the intake snorkel. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.   Automotive Repair     Auto Body Repair and Refinishing     Heating or AC Issues     Electrical and Wiring     Brake Systems     Car Stereo Repair Advice     General Discussions     Car Making Funny Noises     Engine Fault Codes     Engine Troubles     Exhaust Systems     Steering and Suspension     Transmission Troubles     Tricks of the Trade Automotive World     General Discussions     Antique Car Talk     Car Shows and Events     The Bargin Bin     Motor Vehicle Inspection     Car Care Tips     Traffic Tickets     Gasoline, Motor Oils, Concept Cars and Engines     Auto Insurance, Financing, Leases, Warranties Truck Repair     General Discussions     Truck Engine Repair     Truck Suspension Repair Motorcycle Repair     General Discussions     Motorcycle Engine Repair CarJunky     Open Posting     Board FAQ's     New Board Suggestions

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