why does my Honda CR-V have a rough idle when it's cold

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the negative battery terminal to ensure safety.

2. Replace Engine Coolant Temperature Sensor

• Tools Required: Socket set, wrench
• Remove the electrical connector from the ECT sensor.
• Use a socket to unscrew the ECT sensor from the engine block.
• Install the new ECT sensor and torque it to the manufacturer’s specifications (typically around 13-15 lb-ft).
• Reconnect the electrical connector.

3. Clean the Throttle Body

• Tools Required: Throttle body cleaner, soft cloth, screwdriver
• Remove the air intake duct connected to the throttle body.
• Spray throttle body cleaner onto a soft cloth and wipe the throttle plate and inside walls of the throttle body.
• Ensure the throttle plate moves freely and reassemble all components.

4. Inspect and Replace Spark Plugs

• Tools Required: Spark plug socket, torque wrench
• Remove the ignition coils or wires to access the spark plugs.
• Use a spark plug socket to unscrew the old spark plugs.
• Inspect the gap on the new spark plugs and adjust if necessary (typically 0.044 inches for Honda).
• Install the new spark plugs and torque them to manufacturer specifications (usually around 13 lb-ft).
• Reconnect the ignition coils or wires.

5. Test Fuel Pressure

• Tools Required: Fuel pressure gauge
• Locate the fuel pressure test port on the fuel rail.
• Connect the fuel pressure gauge and turn the ignition to the "ON" position (do not start the engine).
• Check that the pressure meets the manufacturer’s specifications (typically around 30-40 psi).
• If pressure is low, investigate the fuel pump or filter for issues.