i have 1/3 tank, only and issue from stop and med to hard acceleration for about 2 seconds until it gets going. RPM / Torque related I am thinking.
throttle position sensor
exhaust cam sensor
crankshaft sensor
oxygen sensors
smoke test?
Fuel Tank Sending Unit
Fuel pump
wheel speed sensor
clean maf

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Kevin
2001 X5 3.0i
Phoenix, AZ