Question about 1994 Chevrolet S-10
Injectors have 12 v to them. not operating. it is a throttle body with2 injectors. pcm controls ground.i do have spark.inigition module is operating as far as spark goes.
Even though you have vol,tage to them you might have a pressure problem with the fuel getting to them check on your fuel pump relay it may be defective. if you turn the key you should hear the relay click and the fuel pump run. if the pump runs then check to se if you have good fuel pressure. if you have good pressur but still no fuel to the injectors its your pressure regulator to the injectors that need replaced
Posted on May 08, 2009
You need a noid lite to test injectors also its possiable you may have bad igition module even though you have spark
Posted on May 08, 2009
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Posted on Jan 02, 2017
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Throttle Position Sensor
The 3 wire Throttle Position Sensor (TPS) is mounted on the throttle body and is connected to the throttle blade.
The TPS is a 3wire variable resistor that provides the Powertrain Control Module (PCM) with an input signal (voltage) that represents the throttle blade position of the throttle body. The sensor is connected to the throttle blade shaft. As the position of the throttle blade changes, the resistance (output voltage) of the TPS changes.
The PCM supplies approximately 5 volts to the TPS. The TPS output voltage (input signal to the PCM) represents the throttle blade position. The PCM receives an input signal voltage from the TPS. This will vary in an approximate range of from .26 volts at minimum throttle opening (idle), to 4.49 volts at wide-open throttle. Along with inputs from other sensors, the PCM uses the TPS input to determine current engine operating conditions. In response to engine operating conditions, the PCM will adjust fuel injector pulse width and ignition timing.
The PCM needs to identify the actions and position of the throttle blade at all times. This information is needed to assist in performing the following calculations:
Ignition timing advance Fuel injection pulse-width Idle (learned value or minimum TPS) Off-idle (0.06 volt) Wide Open Throttle (WOT) open loop (2.608 volts above learned idle voltage) Deceleration fuel lean out Fuel cutoff during cranking at WOT (2.608 volts above learned idle voltage) A/C WOT cutoff (certain automatic transmissions only)
Removal & Installation
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