Starting to sound like slipped timing, or MAYBE a stuck injector.
Are you able to keep it running long enough to figure out if it is just skipping on one cylinder, or if it's running poorly on all of them?
A video of what it's doing might help us a lot in understanding the symptoms you're dealing with, if you have the ability to take one and show it to us.
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86 745 D24T/ZF 345k lifted 2.5"
83 764 D24T/M46 155k
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