I am using a Honda accord 2004 model v6, timing jumped it bent the valves , I changed it , but the second engine is not working it's the first one that is working and the shakes a lot so much vibrations. The plugs at the other engine spark but does not burn the petrol. Thereby only one engine is working in the car. I need serious help because I bought a new top for the second engine and its still not working.

You need three things.. Spark, fuel and compression...

First check your compression... if this is a used engine... you should have put an new water pump AND a new timing belt and tensioner. Recheck them and make sure you got them right first.

Also recheck all your electrical connections and make sur ethey are plugged into exactly where they should be plugged.

Check your computer... if its running that bad it should have stored codes to direct you to a specific thing to check.