What should my TPS be at?
If the TPS has a worn spot, most likely it will be between 0 and 20 percent throttle opening. Try holding the throttle between 0 and 20 percent to see if you get a steady reading. If the reading suddenly drops while holding the gas pedal or throttle linkage steady, it may indicate a fault with the sensor.
Can you adjust the idle on a throttle body?
You can recognize it by tracing your air intake hose as it exits the air filter. The next part that the air hoses connect to is a metal part called the throttle body. Look on the sides of the throttle body until you locate a screw or a rubber casing that houses a screw. This screw is how you adjust your idle.
What are the 3 wires on a TPS?
It has three wires: battery voltage, 5-volt reference, and a signal wire. Its purpose is to signal to the powertrain control module (PCM) the amount and speed of the throttle opening. This is an indication as to the demand placed on the engine at any given time.
How do you read TPS voltage?
Touch the negative probe on the multimeter to the negative wire tab on the TPS and the positive probe to the positive tab. The multimeter will display around 5 volts if the TPS is working correctly. Check signal voltage. Touch the positive probe to the signal wire tab and touch the ground probe to the frame of the car.
What should I check before adjusting my TPS?
This should be checked prior to any adjustment of the TPS. Crankcase vapors are commonly vented into the throttle body for re-introduction into the combustion process (by the Exhaust Gas Recirculation, or EGR, valve). These vapors can leave an oily residue on the back of the throttle pate and allow sludge and dirt to accumulate.
What happens if you set the TPS too far out?
Setting the TPS idle transition too close to 0 opening may result in a rough idling engine if the throttle were to stick open a tiny bit. Setting the transition too far out, would result in a sluggish throttle response, since the ECU would see a longer idle section on the TPS.
How does the TPS work on a throttle position sensor?
The sensor basically looks at idle or closed throttle (IDL) and throttle angle opening (VTA). The TPS itself is simply a linear variable resistor that when driven by the ECU produces a linear voltage in a 0-5 volt range, 0 volts being idle and up to 5 volts representing throttle opening angle.
When do you remove the TPS on a car?
However, for heavy sludge buildup, it should be completely removed, washed in solvent, and dried thoroughly. When doing this, it is important that the TPS should be removed to prevent contamination (a primary cause for failure) and the throttle body-to-plenum gasket replaced.