Question about 1990 Chevrolet K1500

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What controls the injectors in a throttle body?

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  • Master
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It uses the trigger assembly in distributor and ecm to fire the injectors

Posted on Jul 13, 2010

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1 Answer

Location throttle body module 2010 jaguar xf


There is no throttle body module. Only a (TPS) throttle position sensor. The injectors are controlled by the ECU. What are your symptoms? What OBDII stored faults do you have?

May 29, 2017 | Jaguar Cars & Trucks

1 Answer

How to replace the fuel injector for a 2008 chrysler pt cruiser?


To remove a fuel injector or injectors you must remove the fuel supply rail that sits over them. Here is how you do that for both engine options, Turbo and non Turbo..

Removal & Installation

Except Turbocharged Models

WARNING Release fuel system pressure before servicing fuel system components. Service vehicles in well ventilated areas and avoid ignition sources. Never smoke while servicing the vehicle. This may result in personal injury or *****.
  1. Release fuel system pressure.
  2. Remove the air cleaner lid, disconnect the inlet air temperature sensor and makeup air hose.
  3. Remove the negative battery cable.
  4. Remove the engine cover or throttle control shield if equipped.
    NOTE Wrap shop towels around hose to catch any gasoline spillage.
  5. Disconnect fuel supply tube from rail.
  6. Remove the Intake Manifold, refer to the Engine section.
  7. Disconnect electrical connectors from fuel injectors.
  8. Remove bolts holding fuel rail.
  9. Remove the fuel rail and injectors.
  10. Remove the injectors from the fuel rail.
To install:
  1. Install injectors to the fuel rail.
  2. Apply a light coating of clean engine oil to the O-ring on the nozzle end of each injector.
  3. Insert fuel injector nozzles into openings in intake manifold. Seat the injectors in place. Tighten fuel rail bolts to 170-230 inch lbs. (19.5-25.5 Nm).
  4. Attach electrical connectors to fuel injectors.
  5. Connect fuel supply tube to fuel rail. Refer to Quick Connect Fittings in the Fuel Delivery section
  6. Install Intake Manifold, refer to the Engine section.
  7. Install the engine cover or throttle control shield if equipped.
  8. Install the negative battery cable.
  9. Install the air cleaner lid, connect the inlet air temperature sensor and makeup air hose. Tighten air inlet tube clamps to 20-30 inch lbs. (2-4 Nm).

Turbocharged Models

WARNING Release fuel system pressure before servicing fuel system components. Service vehicles in well ventilated areas and avoid ignition sources. Never smoke while servicing the vehicle. This may result in personal injury or *****.
  1. Release the fuel system pressure.
  2. Disconnect the negative battery cable.
  3. Disconnect the throttle body inlet hose and remove from throttle body.
  4. Disconnect the purge hose from the throttle body.
  5. Unlock and disconnect the electrical connection at the throttle body.
  6. Remove the throttle control shield .
  7. Remove the throttle and speed control cables from the throttle body.
  8. Remove the cables from the throttle body bracket.
  9. Unlock and disconnect the MAP sensor electrical connector.
  10. Remove the vacuum lines from the rear of the intake manifold.
  11. Remove the 5 bolts from the front of the intake manifold.
  12. Remove the 2 bolts from the rear of the intake manifold.
  13. Remove the intake manifold. Cover the lower intake manifold openings.
  14. Drain the Coolant system.
  15. Move the upper radiator hose clamp, so that the hose can be rotated up and out of the way.
  16. Remove the 2 small hoses from the thermostat housing.
  17. Remove the 2 bolts from the thermostat housing and rotate the assembly up and out of the way.
    NOTE Wrap shop towels around hose to catch any gasoline spillage.
  18. Disconnect the fuel line from the fuel rail.
  19. Unlock and disconnect the electrical connectors from the fuel injectors.
  20. Remove the wiring harness from the fuel rail.
  21. Remove the 2 bolts from the fuel rail.
  22. Remove the fuel rail and injectors from the intake manifold.
To install:
  1. Install the fuel injectors to the fuel rail.
  2. Apply a light coating of clean engine oil to the O-ring on the nozzle end of each injector.
  3. Insert fuel injector nozzles into openings in intake manifold. Seat the injectors in place.
  4. Install the 2 bolts to the fuel rail. Tighten fuel rail bolts to 170-230 inch lbs. (19.5-25.5 Nm).
  5. Install the wiring harness to the fuel rail.
  6. Connect and lock the electrical connectors to the fuel injectors.
  7. Connect the fuel line to the fuel rail.
  8. Rotate the assembly back into place and install the 2 bolts to the thermostat housing tighten to 110 inch lbs. (12.5 Nm).
  9. Move the upper radiator house clamp back into place.
  10. Install the 2 small hoses to the thermostat housing.
  11. Fill the Coolant system.
  12. Install the intake manifold.
  13. Install the 2 bolts to the rear of the intake manifold tighten to 250 inch lbs. (28 Nm).
  14. Install the 5 bolts to the front of the intake manifold and tighten to 250 inch lbs. (28 Nm).
  15. Install the vacuum lines to the rear of the intake manifold.
  16. Connect and lock the MAP sensor electrical connector.
  17. Install the cables to the throttle body bracket.
  18. Install the throttle and speed control cables to the throttle body.
  19. Install the throttle control shield.
  20. Connect and lock the electrical connections at the throttle body.
  21. Connect the purge hose to the throttle body.
  22. Connect the throttle body inlet hose to the throttle body and tighten clamps to 20-30 inch lbs. (2-4 Nm).
  23. Connect the negative battery cable.
  24. Use the DRB® scan tool ASD Fuel System Test to pressurize the fuel system. Check for leaks.

Mar 02, 2017 | Chrysler Cars & Trucks

1 Answer

How to replace the fuel injector on a 2008 chrysler pt cruiser


Removal & Installation

Except Turbocharged Models

WARNING Release fuel system pressure before servicing fuel system components. Service vehicles in well ventilated areas and avoid ignition sources. Never smoke while servicing the vehicle. This may result in personal injury or *****.
  1. Release fuel system pressure.
  2. Remove the air cleaner lid, disconnect the inlet air temperature sensor and makeup air hose.
  3. Remove the negative battery cable.
  4. Remove the engine cover or throttle control shield if equipped.
    NOTE Wrap shop towels around hose to catch any gasoline spillage.
  5. Disconnect fuel supply tube from rail.
  6. Remove the Intake Manifold, refer to the Engine section.
  7. Disconnect electrical connectors from fuel injectors.
  8. Remove bolts holding fuel rail.
  9. Remove the fuel rail and injectors.
  10. Remove the injectors from the fuel rail.
To install:
  1. Install injectors to the fuel rail.
  2. Apply a light coating of clean engine oil to the O-ring on the nozzle end of each injector.
  3. Insert fuel injector nozzles into openings in intake manifold. Seat the injectors in place. Tighten fuel rail bolts to 170-230 inch lbs. (19.5-25.5 Nm).
  4. Attach electrical connectors to fuel injectors.
  5. Connect fuel supply tube to fuel rail. Refer to Quick Connect Fittings in the Fuel Delivery section
  6. Install Intake Manifold, refer to the Engine section.
  7. Install the engine cover or throttle control shield if equipped.
  8. Install the negative battery cable.
  9. Install the air cleaner lid, connect the inlet air temperature sensor and makeup air hose. Tighten air inlet tube clamps to 20-30 inch lbs. (2-4 Nm).

Turbocharged Models

WARNING Release fuel system pressure before servicing fuel system components. Service vehicles in well ventilated areas and avoid ignition sources. Never smoke while servicing the vehicle. This may result in personal injury or *****.
  1. Release the fuel system pressure.
  2. Disconnect the negative battery cable.
  3. Disconnect the throttle body inlet hose and remove from throttle body.
  4. Disconnect the purge hose from the throttle body.
  5. Unlock and disconnect the electrical connection at the throttle body.
  6. Remove the throttle control shield .
  7. Remove the throttle and speed control cables from the throttle body.
  8. Remove the cables from the throttle body bracket.
  9. Unlock and disconnect the MAP sensor electrical connector.
  10. Remove the vacuum lines from the rear of the intake manifold.
  11. Remove the 5 bolts from the front of the intake manifold.
  12. Remove the 2 bolts from the rear of the intake manifold.
  13. Remove the intake manifold. Cover the lower intake manifold openings.
  14. Drain the Coolant system.
  15. Move the upper radiator hose clamp, so that the hose can be rotated up and out of the way.
  16. Remove the 2 small hoses from the thermostat housing.
  17. Remove the 2 bolts from the thermostat housing and rotate the assembly up and out of the way.
    NOTE Wrap shop towels around hose to catch any gasoline spillage.
  18. Disconnect the fuel line from the fuel rail.
  19. Unlock and disconnect the electrical connectors from the fuel injectors.
  20. Remove the wiring harness from the fuel rail.
  21. Remove the 2 bolts from the fuel rail.
  22. Remove the fuel rail and injectors from the intake manifold.
To install:
  1. Install the fuel injectors to the fuel rail.
  2. Apply a light coating of clean engine oil to the O-ring on the nozzle end of each injector.
  3. Insert fuel injector nozzles into openings in intake manifold. Seat the injectors in place.
  4. Install the 2 bolts to the fuel rail. Tighten fuel rail bolts to 170-230 inch lbs. (19.5-25.5 Nm).
  5. Install the wiring harness to the fuel rail.
  6. Connect and lock the electrical connectors to the fuel injectors.
  7. Connect the fuel line to the fuel rail.
  8. Rotate the assembly back into place and install the 2 bolts to the thermostat housing tighten to 110 inch lbs. (12.5 Nm).
  9. Move the upper radiator house clamp back into place.
  10. Install the 2 small hoses to the thermostat housing.
  11. Fill the Coolant system.
  12. Install the intake manifold.
  13. Install the 2 bolts to the rear of the intake manifold tighten to 250 inch lbs. (28 Nm).
  14. Install the 5 bolts to the front of the intake manifold and tighten to 250 inch lbs. (28 Nm).
  15. Install the vacuum lines to the rear of the intake manifold.
  16. Connect and lock the MAP sensor electrical connector.
  17. Install the cables to the throttle body bracket.
  18. Install the throttle and speed control cables to the throttle body.
  19. Install the throttle control shield.
  20. Connect and lock the electrical connections at the throttle body.
  21. Connect the purge hose to the throttle body.
  22. Connect the throttle body inlet hose to the throttle body and tighten clamps to 20-30 inch lbs. (2-4 Nm).
  23. Connect the negative battery cable.
  24. Use the DRB® scan tool ASD Fuel System Test to pressurize the fuel system. Check for leaks.

Mar 02, 2017 | Chrysler Cars & Trucks

1 Answer

What is next on trouble shooting fuel injectors?


what engine?

Do you have power to the injectors? if not check the ECM1 fuse. If blown check the wiring harness around the throttle body for pinched wires to the injectors. Really common on the early throttle body engines.

Aug 19, 2015 | 1989 Chevrolet C1500

1 Answer

When i turn on heater or fan engine revs over 3000 rpm


Idle Air Control Valve Pintle may be bad If you disconnect the IAC and the problem ceases it can point to this being the problem.: Removal & Installation 3.5L Engine To Remove:
  1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
  2. Remove the fuel injector sight shield.
  3. Drain the cooling system.
  4. Remove or disconnect the following:
    • The air cleaner intake duct. Figure of IAC and TPS electrical connectors disconnected. aurora_g1.gif

    • The idle air control (IAC) valve and throttle position (TP) sensor electrical connectors. Figure of cruise control and throttle control cables removed from throttle lever. aurora_g2.gif

    • The cruise control cable and throttle control cable from the throttle body lever.
    • The fuel pressure regulator vacuum hose, positive crankcase ventilation (PCV) hose and the throttle body vacuum port hose.
    • The throttle body coolant hoses.
    • The throttle control cable bracket, leaving the throttle and cruise cables connected.
    • The upper nut holding the throttle body to the intake manifold.
    • The throttle body assembly.
  5. Clean the gasket mating surfaces.
To Install:
  1. Install a new gasket and new studs if necessary.
  2. Install or connect the following:
    • The throttle body assembly.
    • Start the top nut by hand.
    • The throttle body coolant hoses.
    • Position the throttle control cable bracket and hand start the retaining nuts and bolt.
    • Torque the three throttle body retaining nuts to 89 in.lbs. (10 Nm). And the bracket retaining bolt to 115 in.lbs. (13 Nm).
    • The throttle body vacuum port hose, PCV valve hose and the fuel pressure regulator hose.
    • The throttle control and cruise control cables to the throttle body lever.
    • The IAC valve and TP sensor electrical connectors.
    • The air intake duct.
  3. Refill the cooling system.
  4. Install the fuel injector sight shield.
4.0L Engine To Remove:
  1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
  2. Relieve the fuel system pressure.
  3. Remove or disconnect the following:
    • Negative battery cable.
    • The Mass Air Flow (MAF) sensor electrical connector.
    • The air cleaner intake duct.
    • The PCV valve fresh air tube. Figure of cruise control cable removed from throttle cable bracket. aurora_g3.gif

    • The cruise control cable and throttle control cable from the bracket.
    • The cruise control cable and throttle control cable from throttle body lever. Figure of IAC valve and TPS connectors removed. aurora_g4.gif

    • The idle air control (IAC) valve and throttle position (TP) sensor electrical connectors. Figure of fuel lines removed from retainer on throttle cable bracket. aurora_g5.gif

    • The fuel feed and return lines from the retainer on the throttle control cable bracket.
    • The transaxle shift cable clip from the throttle control cable bracket. Figure of throttle body removed from water crossover. aurora_g6.gif

    • The throttle body from the water crossover.
To Install:
NOTE: The Mass Air Flow (MAF) sensor inlet and the outlet of the air cleaner assembly must line up when installed. Misalignment may cause MIL illumination or driveability concerns.
  1. Install or connect the following.
    • The throttle body to the water crossover. Torque the bolts to 106 in.lbs. (12 Nm).
    • The IAC valve and TP sensor electrical connectors.
    • The throttle and cruise control cables to the throttle body lever.
    • The throttle and cruise control cables to the throttle control cable bracket. The transaxle shift cable clip to the throttle control cable bracket.
    • The fuel feed and return line retainer to the throttle control cable bracket.
    • The MAF sensor electrical connector.
    • The air cleaner intake duct clamp. Torque the clamp to 27 in.lbs. (3Nm).
    • The PCV valve fresh air tube.
    • The fuel injector sight shield. Torque the nuts to 20 in.lbs. (2.3 Nm).
  2. Install the negative battery cable.
  3. Pressurize the fuel system and verify no leaks.
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Oct 07, 2010 | 2001 Oldsmobile Alero

1 Answer

1993 geo tracker fuel injector


ecm does control but is also based on input from the Throttle position senser. unplug the TPS and try again. Also make sure the ECM and engine grounds are good

Feb 21, 2010 | 1993 Geo Tracker

1 Answer

High idle on 87 cavaleir


The idle of the vehicle is controlled by the idle air control motor located on the throttle body looks like a little barrel with a plug in on the end bolts to the throttle body.

Sep 06, 2009 | 1987 Chevrolet Cavalier 4 Door

1 Answer

'99 Neon Idle Control problems


its the air intake throttle body housing find your air filter and follow its assembly back to the throttle body this what your looking for the throttle is stuck by some build up in throttle body use some fuel injector cleaner on and in the throttle body

May 31, 2008 | 1999 Dodge Neon

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