Ok this is the situation,i just installed a new timing belt and a new headgasket a week ago.prior to doing the headgasket and timing belt i would be driving and the car would shake some when at a light.but when i start to accel the shaking would stop,but when i would step on the gas some more it would not have any pickup.she does'nt overheat,nore smoke.when i would go from "D" to Park,the shaking would stop.It would only shake when in gear and the foot is on the brake.And i did line up the crankshaft and the camgears,plus the distributor is lined up with the #1.She still has no power but will drive fine thoe.can somebody help.would a crack block give a lack of power?not sayen i have a crack block,and last i have no codes showing.