My 1987 4x4 Turbo Toyota truck has had a strange miss and luggish performance and a idle that cannot seem to make up its mind. Well I hope I am narrowing it down. When I pump the gas pedal my idle goes up say from 900rpm to 1200 rpm and stays at 1200 rpm if I continue to pump it. Could this be the problem of my poor performance, seems like my computer is getting bad signals from brake pedal? Mine seems to do the opposite of the brake pedal problem. Any ideas thanks?