Tried everything cleaned mass air flow.checked all vacuum lines.truck still stutters around 40mph.trouble getting up hills .recently put in new cat rest of exhaust was changed 6 months ago except y pipe .o2 sensors r new only have 2 in this truck never had 3 red behind cat .old cat was hollowed out cause I got stuck on side of road and hollowed it out .have own buisness and had no time to get tow ect ect...after new cat started to notice small leak from exhaust manifold slowly getting worse .could that cause all this? I'm stumped
Sep 20, 2013 at 6:48 AM
