cross firing

[chvyboy]

alright so im driving my truck and i begin to notice that my truck is like bogging down and at some points almost dying. once i noticed that i decided to head home to figure this out. im about 15 minutes away from my house and the truck back fires (funny because everyone around ducked because they thought it was a gun shot). but then my truck is having a hard time running. died about 10 times on the way home. i checked the spark plugs and they were all clean, no cuts. has anyone had this problem before?