Vehicle only running on two cylinders

Hi,

Have you checked to see if there is spark and fuel to the affected cylinders? Also, have you checked for a timing belt issue?

First, check to see if cylinders 3 and 4 are getting ignition spark.

https://www.2carpros.com/articles/how-to-test-an-ignition-system

If they are, remove the spark plugs and check condition. If they are wet, let me know.

Next, if they are wet and you do have spark to the plugs, check engine compression. Here are a couple links to help:

https://www.2carpros.com/articles/symptoms-of-low-compression

https://www.2carpros.com/articles/how-to-test-engine-compression

Do these things and let me know what you find.

Joe