ok i have a 1991 DA that i just bought, i replaced the radiator, thermostast, head gasket, and valve cover gasket and also i adjusted the lifters, now the problem with the car is that it bogs out when i floor it, and also it makes a real loud ticking noise but i doesnt seem like its coming from the lifters it sounds more from the injectors, what can be the cause of the problem... somebody please help me