Ok, so maybe I am just a little stupid, but before i replaced my Distributor Cap and Rotor there was NO misfire or backfire.....but after i put the new one on there was??

I put it all back on right, wires are all in the right places....any ideas....

P>S> My Truck is a 1996 Tahoe 4WD, 5.7L, SFI.....

 

did you get a bad cap? I heard that the cheap ones are slighty bigger then the stock ones so you get less volts to the plugs. Also doubel chekc that the plugs "snapped" on all the way, could be a loose connection.