Originally Posted by D27
It true that once I put jb4 I should change the coil and the spark plug? I have 40mile and I had jb4 for a week already and it was misfire 5,6 so I change just the coil and it run fine both coil 5,6 should I change the rest 1,2,3, and 4 and all spark plug or just wait until they go bad?
I THINK you are asking if you should replace all plugs at 40k miles. I know you said 40mile, but again i THINK you meant 40k
Yes OP, replace plugs. I did right after Jb4 isntall because of missfires. Haven't had a missfire since.