Symptoms of a bad tps include rough idling, fuel-rich signs such as fouled spark plugs, black smoke ROM the exhaust, etc. Although maybe possible, most likely not probable. A worn-out belt can prevent the Crankshaft-Camshaft Position Sensor from synchronizing, causing the sensor to send the wrong signal. Can Bad Spark Plugs Cause a Car To Crank But Not Start? The job of the Throttle Position sensor is to gauge throttle position- that is controlled by the gas pedal. You could also have a faulty throttle position sensor which would prevent the spark from being generated in the internal combustion cylinder. Still diagnosing the problem but have already replaced throttle body and harness with no success. Edited by Mark on 1/30/2011 at 12:42 AM EST So, based on your voltage tests, your tps is no good, so the first thing you need to do is replace the tps. The PCM uses the trigger signal from the crankshaft position sensor, and/or camshaft position sensor to pulse the injectors. 4. This is most noticeable when at idle, when on the highway with the cruise control set, or when keeping the throttle steady with your foot. While it is running you can plug it back in and will stay running but it still has almost no throttle response from pedal. ... A failing TPS can cause the engine to search for an idle or surge. This sensor is also used to gauge the engine load. If you have over 4 volts on both wires, then you have a bad tps. 4) Starter Motor. Throttle Position Sensor. 3. 2. i had a bad throttle position sensor on my car and it still started, didnt idle worth a crap but it started. When there’s no spark, there’s no starting. 1. If there are no misfire codes, a common cause of acceleration stumble is a bad throttle position sensor (TPS). The anti-stick solution will make it easy for you to remove the TPS in case you need to replace it again. The computer uses this information to determine how much fuel is needed to maintain the correct air/fuel mixture and when extra fuel is needed if the throttle suddenly opens wide. I … If the spark plugs are old, worn, fouled, or damaged, they might not spark. … If you have experienced some of the other symptoms on this list, it may be due to a bad throttle position sensor.#4 – Inaccurate readings can cause too much fuel to inject into the combustion room because the excess fuel consumption throttle position sensor … Expect a total of 100$ to 300$ for replacing the accelerator pedal position sensor. The cost differs a lot depending on if you can replace just the position sensor or, like in some car models – you have to replace the whole accelerator pedal, which makes it much more expensive. Symptoms of a bad throttle position sensor. The labor cost can range from $50 to $100 at a workshop. no it wont make it not start,it will make it hesitate and loose power but it should still start,one way to find out is disconnect it ,the car should still start with it disconnected,good luck. rough or irregular idlying problem. 1. Remove the faulty sensor from the throttle chamber. Apply a few drops of anti-stick solution to the tip of the replacement throttle sensor and install it in the throttle chamber. ... i doubt it! When you turn on the key the injectors should receive battery voltage. Obviously with false throttle body codes but with throttle body unplugged, that is the only way the vehicle will start. Here are some common symptoms of a bad or failing throttle position sensor to watch for: 1. Replacing The Throttle Position Sensor. In theory, this could cause a no start, but in actual fact I have never seen this cause a no start. The TPS tells the computer how far the throttle chamber an idle or.... 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