[crazy torino]

a few weeks ago my brother'n'law and me changed the timing belt on my stealth. and after all that thinking that was the problem it still loose power. for exzample when it starts up somtimes it drops to 100 rpm and idels and u can floor the pedal and it will not rise over 3k. and then some times it will go right to idel but revs very slow and when it is drive u can feel it loosing power at diferent rpm ranges. like when it will actually runs a little right it will have power to 4k then loose that pwoer transfer from 4k to 5k and is fine to red line. its not spark plugs those have been changed and a new clutch has been installed
any ideas