You've got a good response so far, but here is one that probably nobody thought of...IF the other recommendations don't work:
I know...this will sound crazy but it's true. Corroded battery cables can affect the computer and cause engine cut-out and even complete power loss at high RPM. The typical situation is a full throttle acceleration to high RPM followed by the engine dying...like somebody turned off the ignition switch. The engine will start right back up but die each time at full throttle and high RPM. If you've run out of ideas and your problem continues, try using jumper cables from the ground terminal to frame to add to the grounding of the battery. You may have to try that technique with the positive terminal too. If the engine running problem disappears, then you know you should replace those corroded battery cables. Often the cables look okay, that is until you peel-off the covering. Yeah...I know....Doug's nuts to say this...but it's true.