just did h/c/i swap now im havin problems besides the typical smoke off. first the rockers are hitting the valve cover. this is not the first swap i did but do you guys think that that would make the car feel like it has a slight miss? also i decided to take the car up the block anyway hopng the knockin would go away i made it one house down and couldnt take it anymore went home in fear well anyway it back fired wtf? please im more then annoyed also i did the fox tbody swap cra has an ecam 1.7 roller rockers tfs intake 70mm tbody hanks in advance