I have this truck & doesn't idle very well. Guy before me told me it had a compression test & a valve was damaged. Want to do my own test. No signs of plugs or wires. Are they under the valve cover ? Can I tell the bad valve - int or exh - in comp test ? How to set valves after if I remove head to replace valve ? Thanks

 

you have to pull off each coil to find the spark plugs. The plugs sit under the coils. A service manual will show you how to set the valves if you need to replace them.

 

Yes, is there a link that would have a FREE download or someyhing to even look at even just to copy down with a pencil - as far as doing a valve set on this 5.4L Triton >>>>> Thank You.