I have a '07 g35x and for the past few summers I have noticed that my rpm gauge acts up occasionally, especially when it is hot. Sometimes it will redline when I am going 20-30 mph and sometimes it won't go past 0. I have had the instrument cluster replaced, yet this continues to happen - and I think the local Infiniti dealership is equally as confused.

Has anyone had this issue or know what I can do to fix it?

I read another post, but that was purely the rpm going to 0.

Thanks!