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Hesitation upon acceleration

Would a throttle positioning sensor cause a hesitation on acceleration??

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Hello/ Yes it can, but it is not the only possible cause. There could be an air/fuel mixture problem. This may be caused by one of the following: Oxygen Sensor, Coolant Temperature Sensor, Manifold Absolute Pressure (MAP), Mass Air Flow (MAF)Sensors, or the Fuel Pressure Regulator. I think that you need to get the codes from the ECU/PCM. These can be obtained from AutoZone, Advanced Auto, Pep Boys etc. free of charge. If there are no codes, you'll need to go to a reputable service center and ask for a diagnostic. They will generally deduct the amount for the diagnostic from any work preformed

Posted on Apr 26, 2010


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My 2003 dodge is running real rough i put a scanner on it and it pulled up p0508,p0113,andp0123 what are they and how hard is it to change

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1 Answer

Throttle hesitation

Is the check engine light on, and have you checked fuel pressure with a gauge ?
The most common cause of that problem is a faulty Throttle Position Sensor but it should set a code in the computer.

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1 Answer

I have a 1988 pontiac firebird with a 2.8 v6 fuel injected engine that displays code 32 and 34. We have changed the plugs, plug wires, rotor, and dist. cap and have also replaced the mass air flow (maf)...

Check throttle position sensor (TPS) is a sensor used to monitor the position of the throttle. The sensor is usually a potentiometer, and therefore provides a variable resistance dependent upon the position of the valve. The sensor signal is used by the engine control unit (ECU) as an input to its control system. The ignition timing and fuel injection timing (and potentially other parameters) are altered depending upon the position of the throttle, and also depending on the rate of change of that position. For example, in fuel injected engines, in order to avoid stalling, extra fuel may be injected if the throttle is opened rapidly (mimicking the accelerator pump of carburetor systems). the cost about 50-75 bucks.

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Hesitates upon acceleration & will not maintain a steady speed

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