I changed my ignition coil on my 1994 Chevy k1500 tbi 350 because I tested the old one and it tested to be bad so I changed it.. I started the truck and it ran like absolute crap the rpm gauge was going all over the place and then it died. So I thought the new coil was bad so I swapped it out for a new one again and it does the exact same thing.. but if I put my old coil I believe to be bad back on it runs good besides the misfires and stutters I have.. anyone have a clue what’s happening I’m lost..