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How do you adjust the idle on a 1987 Mercedes 190e with 2.3 engine?

Tools:

- Flat head screw driver

- 5mm allen wrench

- Pliers

- Multimeter

- 10mm Socket

- 13mm socket

-Breaker Bar

- 2 -Jack Stands

- 2 -Wheel Chocks

- Oil Drip Pan

Instructions:

Step 1: Lift and Secure Your Vehicle

- Engage your parking brake.

-Chock the wheels that will remain on the ground.

- Jack up the front of the vehicle until there’s enough room to safely work under it.

- Place the jack stands under the vehicle’s pinch weld.

-Lower the vehicle onto the jack stands.

Note: If you do not have access to a jack and jack stands, you can also drive your vehicle up onto ramps.

Step 2: Locate the idle air control valve (IACV)

- Open your hood. The IACV is located on the throttle body.

- It is a black cylindrical valve with a two-pin connector.

Step 3: Disconnect the IACV connector.

- Use a flathead screwdriver to carefully pry up the lock tab on the IACV connector.

- Then, pull the connector straight up to disconnect it from the valve.

Step 4: Remove the IACV from the throttle body.

- Use a 5mm allen wrench to loosen the two bolts that hold the IACV to the throttle body.

- Once the bolts are loosened, use your pliers to carefully remove the IACV from the throttle body.

Step 5: Clean the IACV.

- Use a throttle body cleaner and a rag to clean the IACV.

-Be sure to clean the pintle valve and the throttle body bore.

- Inspect the O-ring on the IACV. If it is damaged, replace it.

Step 6: Reinstall the IACV.

- Insert the IACV into the throttle body bore and hand-tighten the bolts.

- Use your 5mm allen wrench to tighten the bolts to 8 Nm.

Step 7: Reconnect the IACV connector.

- Push the IACV connector onto the valve until the lock tab clicks into place.

Step 8: Start the vehicle and let it warm up to operating temperature.

- When the engine is warm, connect your multimeter to the IACV terminals.

- The voltage reading should be between 0.5 and 1.0 volts.

If it is not, adjust the idle speed screw until the voltage is within the correct range.

Step 9: Test the idle speed.

- Shift the transmission into drive.

-Your idle should now be set to the correct RPM for your engine.