Cylinders 5 and 6 not firing?

Hi,

If you have spark to those cylinders and there is good compression, that leaves timing and fuel. Timing must be correct if six of the eight cylinders are working. So, we need to check if injectors 5 and 6 are getting power.

Each fuel injector will have a red wire and then one that is different. With the key in the run position (engine off), see if the red wires to the affected injectors have power.

If they do, connect a test light alligator clip to the battery positive. Probe the other wire at the connector and have someone crank the engine. Does the light flash on and off?

Let me know.

Take care,

Joe

See pic below.