my Toyota Camry XV50 is idling rough and losing power what could it be

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Replace Spark Plugs

• Remove the spark plug wires or ignition coils carefully.
• Use a spark plug socket to remove the old spark plugs.
• Inspect the old spark plugs for excessive wear or carbon buildup.
• Install new spark plugs, ensuring they are gapped correctly according to specifications (typically around 0.043 inches for the Camry).
• Reattach the spark plug wires or ignition coils.

3. Clean or Replace Air Filter

• Locate the air filter housing and unclip or unscrew it.
• Remove the old air filter and inspect the filter housing for debris.
• Install a new air filter, ensuring it is seated properly.

4. Inspect and Clean Throttle Body

• Locate the throttle body and remove the intake duct connected to it.
• Use throttle body cleaner and a soft cloth to clean the inside of the throttle body, removing carbon deposits.
• Reconnect the intake duct securely.

5. Check and Repair Vacuum Leaks

• Visually inspect all vacuum hoses and connections for cracks or disconnections.
• Replace any damaged hoses and ensure all connections are tight.

6. Test and Replace Fuel Pump (if necessary)

• Connect a fuel pressure gauge to the fuel rail.
• Turn the ignition to the ON position without starting the engine and check fuel pressure.
• If the pressure is below specifications (typically around 40-50 psi for the Camry), consider replacing the fuel pump.