How do you reset the idle air control valve on a 350 TBI?
Connect the IAC connector. 6- Start engine and run for 5 seconds, turn engine OFF and wait at least 30 seconds. This will reset the IAC control.
What should TPS be at?
The TPS voltage should be between . 2 and 1.5 volts. It should increase to 5 volts when you open the throttle plate. The TPS needs replacing if it doesn’t reach 5 volts.
How do you reset the throttle position sensor on a GMC?
The easiest way to reset your throttle position sensor is to unhook the negative cable from your battery for up to five minutes or to remove the fuse for your engine control module.
How much fuel pressure does a GM TBI need?
The fuel pressure regulator is set for approximately 12 psi (30 psi on ’94 & ’95 BBC trucks). With a service range of 9 to 13 psi being considered good.
How do I check the TPS on my throttle body?
If out of spec, loosen the two screws holding the TPS to the throttle body, and slightly rotate the TPS up or down, reading the voltage until it comes into specification. Tighten screws. Using the throttle lever, rotate the throttle to WOT (wide open throttle). The TPS voltage should be over 4.0 volts.
How does a GM TPS sensor work?
Like the majority of throttle position sensors on modern fuel injected cars and trucks nowadays, the GM TPS is a three wire sensor. Each wire provides a specific type of signal to the TPS or to the PCM (Powertrain Control Module=Fuel Injection Computer). Below are the circuit descriptions of each:
What does the throttle position sensor do on a GM Truck?
Like the majority of throttle position sensors on modern fuel injected cars and trucks nowadays, the GM TPS is a three wire sensor. Each wire provides a specific type of signal to the TPS or to the PCM (Powertrain Control Module=Fuel Injection Computer). Below are the circuit descriptions of each: Circuit labeled 1 :
What should the TPS voltage be when the ignition is on?
Once you get your TPS voltage display up, turn the ignition on but do not start the engine. The voltage with closed throttle should be between 0.400 and 0.625 volts for most applications (check appropriate reference guides for your application’s specified voltage range).