Tel was shutting off when got hot Replaced fss and still doing same thing will not do it driving around d town but as soon as I am in fifth gear and go I g down highway truck gets stuck at whatever rpms the peddle is at and ticks and shakes real bad then after a couple seconds I have peddle responsibility ce back and dose it again Let truck sit For 30 sec runs fone till get back into fifth gear and dose it again not sure if injection pump is problem or what need help pleas send