Hey guys, I have an HKS type 1 turbo timer in my car and I have it set to auto-time which shuts down based on how i drive.

However, when I look at the digital reading of my RPMs, it shows idle around 940-960rpms. while the gauge shows 500rpms. I'm not sure, but I think it used to show 700's in the digital readout before.

After acceleration though, the turbo timer was pretty much accurate and had a pretty similar reading with the tach.

However, now it idles at 960s, and is about 1000rpm higher than what my tach is reading...I'm pretty sure the tachometer is more accurate.

Does anyone know how to fix this?

You sure it's all hooked up correctly? I'd assume so!

Check your ground, it might be a bit loose, or there might be too much resistance on it, causing a false reading. Just a prelim internet diag'd thought ;)

thanks. everything was hooked up correctly. everything reads pretty accurately except recently