So I bought a 96 cobra and it was suppose to have had an engine rebuild, etc. Well when I test drove it, it didn't run the greatest but I was thinking old gas(due to it being for sale and sitting for around a year) or a bad tune. It has cams in it but not sure the duration/lift etc. I also don't know what was rebuilt(bought it from a dealership and they know nothing about the car). Took it to my local speed shop which is very good with tuning bosses cobras gt500s etc. Said its not running right can you please tune it. So long story short the o2s were gone put new ones in and tuned it the best he could but he said hes getting some weird codes and one side of the engine is lean the other is rich so he cant just add fuel to one side. Well when I drive it under 3500 rpm or so it has like no power(I have to keep in mind im coming from a 03 cobra) then really gets up and goes around the 4000(could be due to the cams). Now its seems like the tuning has reversed or something because while driving just say 30-40mph staying very steady its stuttering hesitating. Now im also burning oil. So thought maybe irmcs are gummed up etc took everything out and found out it has the delete kit in it. Now when I look into the intake side and look at some of the valves there is a pool of oil laying on top of some of them. What could that be from ? Im wondering if I need to rebuild the top end. Im not sure if the guy just through bigger cams in it without different springs etc. Also do you need to change the size of valves with bigger cams ? Sorry I don't know a lot of technical details. I can easily fix/replace stuff but as far as figuring out technical specs of duration lift, spring tension etc to use im not sure. Also I have msd coils and wires ... I might have a wire that might be shorting to the head but not to sure.
Thanks.
Thanks.