2nd Gen Ram Tech1994-2001 Rams: This section is for TECHNICAL discussions only, that involve the 1994 through 2001 Rams. For any non-tech discussions, please direct your attention to the "General discussion/NON-tech" sub sections.
Don't know if this is normal or not, just started hearing it lately so I'm going to say no it's not normal. It's strange because I can put my finger on top of the injector where the red/green wires are and I can actually feel it ticking.
I use 1 ounce of 2 cycle oil meeting TC-W3 standards to 5 gallons of gas. Runs smoother, keeps fuel system clean, and maybe just a smidgen better mileage. I even use it in my John Deere mower, it helped the fuel consumption noticeably in it.