OK, its acting strange, it is idling funny, kinda like its missing, and when you get over 25- 30 MPH the check engine light starts flashing... I brought it in to get plugged in to see what the problem was and the guy told me it was a problem with the number 5 cylinder, he thought it was just a fouled out plug or perhaps a plug wire gone bad, so naturally I changed them, no difference...I had previously had 2 separate rocker arms pull out, so my brother thought that could be it again or he thought it could be the intake gasket(thank god I have him right?) he was wrong about both theory's... What else could it be? Injectors? Head Gasket? Anything?