I dont know what seems to be the problem
The rpm tach works only if the truck is warmed up???
what could you folks say about this

 

The signal comes from the igniter,check for lose or broken wire,may make contact when warm as expansion!

 

okaye ill check it......thanks truck action...

so what about the temp, and oil, i just noticed that it goes on and off

 

Check the plug into the guage cluster itself. It almost sounds like it might be loose.

 

That's the first thing I did,,,,