I have a 1999 Continental that has a engine miss at nearly all speeds that I cannot get corrected. Not all the time, not all the same cylinder (apparently). Been to the dealer, everything tests out OK. they say the Bosch plugs were the wrong "brand". Had them changed to Autolite. New coil over's all around..still have the miss. Injectors are clean. Have not checked fuel pressure, but kinda think the dealership would have done that already. See this problem is pretty commonplace throughout all the Ford models the 4.6 COP engine was put in...I'm not satisfied with "we cannot find the problem". Can anyone help??