Q: Car shudders

asked by on October 21, 2017

When I press the gas lightly, with some force, or to the floor, the car shudders or stuttters like it can’t breathe for a couple seconds and then clears up and accelerates. It can happen at any RPM in any gear. I have noticed an actual loss in power as well in general. Strangely enough this problem seems to occur any time I hit a bump or speed bump in the road but it may be a coincidence. Also this problem is very inconsistent, it will be there one day and gone the next. I have taken it to a shop and they found the air intake was loose, the MAF was dirty, and one 02 sensor was loose. All issues were fixed. However the problem is still there and I am at a loss. There seems to be no vacuum leaks and the exhaust is tight. Any opinions would be hugely appreciated. Thanks. slomach

My car has 71000 miles.
My car has an automatic transmission.

There are a number of things that may cause the car to hesitate when accelerating such as low fuel pressure, a dirty or faulty mass air flow sensor, clogged or dirty fuel injectors, a faulty throttle position sensor or potentially a bad fuel pump. Other things like a vacuum leak or faulty ignition components such as bad spark plugs or spark plug wires may also cause this kind of hesitation when accelerating. I would recommend having a professional from YourMechanic come to your location to diagnose and inspect your vehicle.

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