Feb 032016
 

1993 Nissan Altima - Car hesitates

My car hesitates during take off. What can make it hesitate during takeoff?

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RESPONSE

Car hesitates when accelerating

There are many things that may have a hand in causing your car to hesitate. When the car hesitates it may be caused from a failing sensor. When a sensor fails the On Board Diagnostic (OBD) computer will store a code and illuminate a check engine light on the dash.
– Nissan OBD Trouble Codes for car hesitates related to transmission shifting
CODE 14 Vehicle Speed Sensor (VSS)
– Nissan OBD Trouble Codes for car hesitates related to ignition/fuel. Possible contaminated fuel or old fuel.
CODE 34 Knock (Detonation) Sensor
– Nissan Trouble Codes for car hesitates related to acceleration. Throttle electronics including wiring harness and sensors.
CODE 43 Throttle Position Sensor (TPS)
Car hesitates from Throttle body

Car hesitates when stepping on gas

Sometimes it has nothing to do with electronics and sensors. Instead look at the mechanical side. This can be a dirty throttle body. You may be able to clean the throat of the throttle body. Start with a lightly alcohol soaked rag. Make sure to get the outside of the butterfly as well. This will allow more airflow at idle. This would increase the amount of air/fuel into the engine on take off. A loose connection around the air intake and air filter locations may have occurred. A vacuum leak can cause havoc on the engines ability to control itself. Usually a higher idle accompanies this. And sometimes leaving the air conditioning on is all it takes to slow this mule down.

Car hesitates when accelerating from a stop

Your car brake system could be at fault here. If your brakes are worn they could be grabbing the rotors. A caliper may be sticking an not allowing the brakes to retract. This would cause the brakes to drag on take off. The engine would have to work harder to move. A warn hub bearing could also create drag but you would hear a grinding in most cases.

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