I have a 1996 tahoe 2 door 350 i put the mpfi conversion about 2.5 yrs ago had num 2 injector go bad stuck open about a week ago fixed it new injector but now i have number 7 missfire fuel pressure is at 62 primeing and 54 idleing, holds pressure too took about 15 mins for 10 lbs to bleed off idleing its sometimes not present at all when in gear its more noticible and lower rpms and lower mph its pretty noticible high/ full throttle none at all injector pulse is correct and its getting spark plug is not fouled at all i tested 7 1 2 plugs/ wires with a inline tester all 3 looked the same but in the pictures u can tell the bright flash is from it hitting but the other one im not sure if thats normal or its arcing. If its arcing wouldnt it affect more than 1 cyl? Also the less bright flash in the pic is consistant with all 3 of the plugs/wires i tested Also smellsblike somthing is on fire im thinking that is a oxygen rich mix burn? Not sure