Scotty,

I live on a small island in the Caribbean.

I have a 2005 Toyota Harrier with the 1Mz-fe engine, 110,000 Km.

Engine developed a misfire on the back cylinders. I replaced all the coils, plugs and injectors with Toyota oem parts. This did not fixed the misfire. I then tested three of each part that I removed and installed on the back cylinders. Found one bad coil and injector. Looks like i got a bad batch of Toyota parts. Put every thing back together and engine running smooth. 

I am now hearing a rattling coming from the catalytic converter. Removed the exhaust and found a few pieces of honeycomb loose. Cleaned out the loose pieces and everything is now ok.

Since I have to import all the parts from overseas, it took me four weeks to sort out.

I have a question; why has Toyota fit the engine so close to the fire wall. With just a few inches clearance, I would be able to reach the back cylinders to test the coils and injectors and even change spark plugs without having to remove the entire intake system.