Question about 2001 Pontiac Grand Am SE

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No injector pulse

The car has 130k on a 2.4l. Tps volt range .544v closed 4.6v ft.

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Sounds like ur injectors r shortedout

Posted on Jun 16, 2008

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1 Answer

No injector pulse on 94 olds 3.1


The PCM bases injector pulse timing and sequence on the camshaft position sensor. If that sensor and circuit is good, it could be a bad PCM.

Mar 01, 2014 | 1994 Oldsmobile Cutlass Supreme

1 Answer

No Injector Pulse


run fault codes as there is a problem sensor in the system. volts at the injector is suspect as the voltage will vary with the fuel requirement.

Jan 05, 2014 | 2005 Mazda Tribute

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Was getting a code for TPS I replaced it now the enging will not start unless I use eather I get it running and hit the throttle and it stalls code 22 was present but not now


Check the wiring connector

Your getting a low voltage reading, as if the
sensor was closed

Back probe it with a volt meter & move the
throttle plate with the ignition key on & look
for response

You should have .42 volts closed
4.85 volts open- if the connnections
are good,the tps is good & your ground
side wiring is good

The either just replaces the fuel not asked for by
the tps & ecm then adjusts the injector pulses

Aug 31, 2013 | 1990 Buick Century

1 Answer

No pulse at injectors


It is located at the lower front of engine near the crank pulley. Don't forget that a faulty TPS can also cause this condition. If you were to depress your gas pedal to the floor this will not let the injectors pulse. This is called (Clear Flood Mode). If you have a scanner available then look at TPS Voltage with Key On Engine Off (KOEO). It should be somewhere from .5 -1.0 volt. If its around or near 5.0 volts then thats like having the Throttle Wide Open. If a scanner is not available then find the signal wire at the TPS. This is the wire that sends the signal back to the PCM. Use a Digital Volt Ohm Meter and check the voltage that way.

Aug 13, 2012 | Ford Cars & Trucks

1 Answer

No injector pulse


1991 this make you OBD1 . You can access a code by jumping 2 terminals together.The injector pulse is from the PCM . If you have no pulse you need to troubleshoot for spark first . If you dont have spark do spark first then injector pulse comes on. If no injector pulse check fuse in engine junction box.Use a volt meter check grounds at PCM. If all else checks out good replace PCM. You may also want to check the TPS. If this sensor short out in the WOT position you also wont get injector pulse.SO disconnect the TPS. and recheck for injector pulse

Feb 23, 2012 | 1991 Chevrolet Caprice

1 Answer

Where is the thorttleposition sensor on 2001jeep cherokee


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:

selectachapter.gif

Cherokee, Grand Cherokee, 1999-2005
Throttle Position Sensor

Print


Operation

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

3.7L & 4.0L

  1. Disconnect TPS electrical connector.
  2. Remove TPS mounting screws.
  3. Remove TPS.

To Install:
The TPS is mounted to the throttle body. The throttle shaft end of throttle body slides into a socket in the TPS. The TPS must be installed so that it can be rotated a few degrees. (If sensor will not rotate, install sensor with throttle shaft on other side of socket tangs). The TPS will be under slight tension when rotated.
  1. Install TPS and retaining screws.
  2. Tighten screws to 7 Nm (60 inch lbs.) torque.
  3. Connect TPS electrical connector to TPS.
  4. Manually operate throttle (by hand) to check for any TPS binding before starting engine.

4.7L
  1. Remove air duct and air resonator box at throttle body.
  2. Disconnect TPS electrical connector.
  3. Remove two TPS mounting bolts (screws).
  4. Remove TPS from throttle body.

To Install:
The throttle shaft end of throttle body slides into a socket in TPS. The TPS must be installed so that it can be rotated a few degrees. If sensor will not rotate, install sensor with throttle shaft on other side of socket tangs. The TPS will be under slight tension when rotated.
  1. Install TPS and two retaining bolts.
  2. Tighten bolts to 7 Nm (60 inch lbs.) torque.
  3. Manually operate throttle control lever by hand to check for any binding of TPS.
  4. Connect TPS electrical connector to TPS.
  5. Install air duct/air box to throttle body.

Hope this helps

Dec 31, 2011 | 2001 Jeep Grand Cherokee

1 Answer

Crown victoria lx 2000 4.6 no injector pulse theres spark but injectors wont open.


Hello! Number 1 suspect is the Throttle Positioning Sensor (TPS)...It can be tested using a volt meter...If you do not have one let me know...
The TPS is mounted on the throttle body and held in place by two bolts...It has a three wire connector...Wire colors are...Gray/White...Brown/White...And Gray/Red...Using two safety pins...Push one pin into the rear of the in-place connector on the Gray/White wire...And the other on the Brown/White wire...Place + probe of meter (set to read 5 volts) on the Gray/White and the - probe on the Brown/White...Turn key to on...Meter should read less than 1 volt (.85)...Move the + probe with safety pin to the Gray/Red wire...Should read 5 volts..Send results...

Guru..........Saailer.

Aug 27, 2010 | 2000 Ford Crown Victoria

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