I have a 1995 ford bronco xl with 154000 miles. I recently bought it and having trouble off the bat. I have a knocking sound coming from the engine but it dont sound like a major knock. It sounds like a lifter but I am not for sure. The motor is a 5.0 efi. I have taken to several shops but get mixed answers. There is no smoke and it has good oil pressure also. Where would u start and how much work is involved or what would u do.