Isuzu Repair: Burnt valve???, spark plug wire, marvel mystery oil

Question
What are the signs of a burnt valve.There was a ticking  coming from my number one cylinder.It only happens when I removed the spark plug wire.It also has a rough idle.What can it be????

Answer
Hello trent, if its a 3.2 cylinder, I would say you have a stuck lifter, common on these engines. I use Catsrol 10w-40 oil and a quart of marvel mystery oil in my oil changes. I had the exact same problem, and after two oil changes, it is completely gone now and If you want any other advice on how to better your engine let me know.