Shawn take it easy im not calling you a liar stop getting so defensive. Im asking a simple question.... because I have different experiences with my HPOP gauge.
I have an isspro gauge tapped into my icp sensor too, it wont read over 1500 psi when its tuned, stock tune it reads up to 4000 psi. I can get 4000 on a mechanical gauge in place of the icp sensor. I know this is a common issue a lot of people had so I was curious how you got yours to work right. I know gauges that use voltage readings are correct but gauges that converter the voltage to PSI dont usually work on tuned trucks because the tuning.