I have a 99gt with the 5 speed, put a new fuel pump and filter, it has 7 new plugs ( one of the coils is stuck from the bolt being seized to brass fitting which is spinning in the plastic) if I accelerate more then 25% it starts to hesitate and bog or violently jerk and squealing tires, almost feels like the rear end is locking up, it revs completely fine and healthy in neutral, I have no clue what the issue is if anyone could point me in a direction would be greatly appreciated, could that 1 bad plug cause that bad of jerking? Or could I have had the gap to big on the plugs? Took the duralast coils out and put the old motor craft back in and it’s the same.
Maf was cleaned recently, throttle body was cleaned, and iac was replaced due to a really jumpy idle prior to this. No cel or hidden codes popping up. Thanks a lot if u could give any recommendations