Shagool22

1993 ls400. Bought this car with this issue and trying to get it sorted out. car runs phenomenal with great power when cold. Once it hits operating temp and idle drops to 500rpms it’s very sluggish and slow up until about 3k than power comes back. Still idles fine. But if I unplug MAF all power is restored regardless of engine temp. NO CODES. Have tried different MAF and ECU with no change. Have also swapped in different coil packs. Not sure where to look next. Stumped.