Got a 94 teg ls, safc hack, 440, 225 lph pump, drag gen 3. Put a universal 4 wire o2 in my car the other day. Then when I left to go home it was running crappy, part throttle hestitation. When you take off normally it just doesnt wont to go any where. then at like 4k it goes smoothly till redline. Then today I go the store and when I go to leave my car wont start. Pull the plug and ground it and no spark. So I swapped out the coil with another used one a couple of hours later and it started right up. But here is the catch it still runs the same way. Is there something else causing this hesitation that burnt up the other coil, or is because it sat for a couple of hours and it started for some odd reason? SOme help on this one would be great

 

check your cap and rotor, check the plug wires, and also, try another 02 sensor...

 

Try to swap the ignition wires Same thing happened to me my wires were bad inside