Misfiring throughout the Toyota RAV4 engine speed range

Tool:

• A set of keys
• Collar for end nozzle
• Nozzles on the collar
• Candle Gap Gauge
• Screwdriver flat medium

Parts and consumables:

• Fuel filter element
• Spark plug
• Distributor
• High voltage wires of the ignition system

Notes:

If during engine operation you find misfires (unstable engine operation), check the engine parts and mechanisms to find the cause of the malfunction and completely eliminate it.

1.  Check the fuel filter for clogging or foreign particles in the fuel system. Replace clogged filter element.

2.  Perhaps the fuel pump does not create the necessary pressure in the line. Check it for troubleshooting.

3. Check spark plugs for wear or incorrect gap. How to remove candles is written in the first part of the article  here . Then check the gap of each spark plug with a spark plug gap gauge. Replace defective spark plugs with new ones.

4.  Then, carry out a visual inspection of the ignition distributor and see if there are any cracks in the distributor cap; maybe the distributor wires are disconnected or the distributor components are damaged. If a malfunction is found, replace the ignition distributor with a new one.

5. Faulty high voltage spark plug wires can also cause the ignition system to become unstable. Therefore, check the wires for cuts, breaks, etc. Replace defective high voltage wires.

6.  Contact the service center for a thorough check by specialists of the components of the exhaust gas aftertreatment system for troubleshooting and troubleshooting.

7. Then check the compression in the cylinders and compare it with the values ​​given in the technical documentation, because uneven or low compression in the cylinder can also cause unstable engine operation. How to check the compression in the engine cylinders is written  here .

8.  Check the fuel injection system, intake manifold gasket, air control valve and vacuum hoses for possible vacuum leaks. You may have to contact a service center for a complete diagnosis of the fuel supply system.

The article is missing:

• Tool photo
• Photo of parts and consumables

Source:  carpedia.club