NOVELTY - Activation of heel and toe mode in fuel cell vehicle comprises determining whether vehicle is in drive gear; determining whether brake pedal angle of brake pedal of vehicle is greater than predetermined brake pedal angle threshold; determining whether acceleration pedal angle of acceleration pedal of vehicle is greater than predetermined acceleration pedal angle threshold; and activating heel and toe mode if vehicle is in drive mode.    USE - Activation of heel and toe mode in fuel cell vehicle.    ADVANTAGE - The method improves fuel cell vehicle performance, provides faster delivery of highly transient power requests, provides flexibility on service, and increases vehicle performance reputation.    DETAILED DESCRIPTION - Activation of heel and toe mode in fuel cell vehicle comprises determining whether vehicle is in drive gear; determining whether brake pedal angle of brake pedal of vehicle is greater than predetermined brake pedal angle threshold; determining whether acceleration pedal angle of acceleration pedal of vehicle is greater than predetermined acceleration pedal angle threshold; and activating heel and toe mode if vehicle is in drive mode. The brake pedal is greater than brake pedal angle threshold and acceleration pedal is greater than acceleration pedal angle threshold where heel and toe mode causes speed of compressor that provides cathode air to cathode side of fuel cell stack to be increased to predetermined set-point. The method also comprises causing cathode air to by-pass stack when vehicle is in heel and toe mode; using cathode air and hydrogen gas to provide stack power when system is in heel and toe mode to charge a battery if battery state of charge is less than charge threshold; and providing nearly instantaneous stack power when heel and toe mode is activated and brake pedal is released. The cathode air by-passes fuel cell stacks if battery state of charge is greater than charge threshold. The compressor set-point speed is 40000-80000 revolutions per minute. An INDEPENDENT CLAIM is included for fuel cell system for vehicle comprising fuel cell stack; compressor (44) providing cathode air to cathode side of fuel cell stack; state machine (32) responsive to signal identifying whether brake pedal angle of brake pedal of vehicle is greater than predetermined brake pedal angle threshold, signal identifying whether acceleration pedal angle of acceleration pedal of vehicle is greater than predetermined acceleration pedal angle threshold, and signal identifying whether vehicle is in drive gear; and cathode controller (42) responsive to heel and toe mode activation signal from state machine and compressor speed set-point.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic block diagram of control system for activating heel and toe mode for fuel cell system.    Control system (30)    State machine (32)    Line (34, 36, 38, 40)    Cathode controller (42)    Compressor (44)