ive got a 85 300d turbo.. i just found out the dealer had a recall on the trap oxidizer ,,mine was never done,, so i took it in and they replaced it for free.. cool huh? anyways.. the alda line is fine and that adjustment on that round thing is done.. still not enough power when taking off.. im thinking of having the valves adjusted... who knows when they were done.. i know they say its suppose to be done like every 25.000 miles or so.. i want to know if it will really help? please advise... thanks.