Background on the car it’s a 96 Corvette A4. When I bought it ran like it had a miss. Since then I’ve found and corrected a number of problems. Removed a jet piggyback tuner pos. Ran great. Still blew raw fuel out one side of the exhaust ( pipes are divorced). #4 injector leaking changed along with spark plug, all good no more fuel out the exhaust. Fuel pump shit the bed, replaced with a new one. Oil change, previous oil was fuel contaminated from injector constantly dripping. Frankenstein 2pc coil wire? Yank. Proper coil wire in. Pulled fuel regulator vac line? Gas pours out, fpr replaced. Now the car fires right up forcefully every time.

now I’m doing datalogs and it just goes max negative fuel trim as soon as closed loop hits. I tuned it with a maf delete cause it’s de-screened. No change.

someone give me an idea what to check next....

I’ll post logs later.