my truck had a miss. shop replaced fuel pump because fuel pressure was way low. it runs better now but they said that the bosch plugs in it are the reason it is still missing a little. they said that i should replace them with autolite plugs or something like them. also said that the bosch plugs do not work well in an older vehicle with some miles on it. have about 150K on it. is there any truth to this or are they pulling my leg?? anyone else ever heard of this??