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Message: <blockquote data-quote="Speedstang302" data-source="post: 696097" data-attributes="member: 12592">alright to clear this up..i ran into problems..landed some pi heads and comp cams..but never thought to have the heads checked before i put them on. so i just sent them out a couple days ago..my sig is exaggerated...i had the npi stuff off..but never got the pi stuff on. so i put the npi stuff back on cuz its my daily driver..i work at a lincoln dealership so i get stuff at cost so i did pick up a 2nd second of factory head bolts and head gaskets. and put it all back on.the coil packs are fine, they all give off great spark when i pull a boot off of it when running, checked all 8. i never installed then i had 24lb injectors and the 85mm maf put on and tune'd with a hand held tuner long before the pi install start. the valve cover gasket's are now replaced and not leaking. its not burning oil..drove it all day and no leaks. i set the tuner back up to stock, then reprogrammed it...no difference..still throwing out codes for bank 2 running rich, and bank 2 running under efficiency threshold.</blockquote>