My car has 85000 miles.
My car has an automatic transmission.
It sounds like you are describing the symptoms of a failing throttle position sensor. The throttle position sensor monitors the throttle position of the throttle plate inside the throttle body in relation to your foot position on the gas pedal. Based upon the inputs from the sensor reading your foot’s position on the pedal, the ECU then makes the direction to supply more or less fuel to the motor. When this sensor is not working properly, this can cause intermittent responses when pressing the gas pedal. I would suggest having a professional from Your Mechanic come to you home to diagnose and inspect your vehicle.
How to Identify and Fix Common car Problems ?
Our sources include academic articles, blog posts, and personal essays from experienced mechanics :
Make sure that the accelerator pedal is fully released. Turn ignition switch “ON” and wait at least 2 seconds. Turn ignition switch “OFF” wait at least 10 seconds. Turn ignition switch “ON” and wait at least 2 seconds.
TPS gives to the onboard controller information about the idling, deceleration, rate of acceleration and the fully open throttle valve state (WOT).
Bad throttle position sensors can cause high idle without causing the Check Engine Light to illuminate.
Relevant Questions and Answers :
the most relevant questions and answers related to your specific issue
I would recommend having an expert, such as one from YourMechanic, come to your home to determine why your car is starting and then dying in the way you have described, and what problems there may be with the throttle.
is designed to prevent knock, ping, and misfire under light throttle loads to help keep the combustion chambers cool. Since the exhaust gases have already been burned, they are cooler than the combustion chamber during ignition.
This prevents pre-ignition misfiring and it does not function at full throttle. A stuck/ inoperative EGR valve can contribute to the problem. Also, if any EGR tubes or passages are clogged with carbon due to age and mileage, the EGR "loop" will not function. I recommend having a certified mechanic, such as one from YourMechanic, come to your location to determine if the EGR valve needs to be replaced.
There are trouble codes that are typically associated with the TPS. One code will set if the TPS voltage is too high when the computer expects to see it lower. Another code will set if the TPS voltage is lower than the computer expects to see. The TPS code for low voltage is the most common and will usually set if the TPS is out of adjustment or the sensor has failed. The first thing you should do when you get a TPS code is to check adjustment and signal output of the TP sensor before replacing it. Be sure to wiggle all connections while watching scan data/voltage readout to make sure the problem is not a loose or bad connection.
There are circumstances that could occur with a failing throttle position sensor that may not set a trouble code. One of the most common symptoms of a failing TPS would be a tip-in hesitation or stumble when you apply throttle to take off from a stop. This can be caused by a dead spot in the TP sensor’s internal circuitry, which usually causes the output voltage signal to not change (or it drops out) when the throttle opens. Unfortunately this type of failure is not easy to diagnose without the proper tool – a digital waveform scope. Most digital volt meters and scan tool displays will not respond fast enough to show this type of a glitch; but some may. If you do find this fault, then the obvious fix is to replace the TP sensor. I would recommend having an expert from YourMechanic come to your location to diagnose and inspect your vehicle.