I tried and found the screw. Messed around with it a bit but with no luck. I gotta wait til I can get a reading on the actual rpms of the car rather than using the dashboard as reference. So I gotta get my obd2 reader working.

 

Agreed, it's weird how they do it. The most critical part of the tach is the first 1000 rpms and they choose to just act like 0 - 500 rpms is not needed.

The first white mark after 0 is indeed 500 rpms. Most people don't realize that.

 

With my gauge Ive found its not too accurate for my car at least

 

Its better than nothing, but you're right a proper external tach (or OBD-2 scanner) is better.

 

Yeah, turns out the obd2 reader cable is bad. I'm gonna have to buy a new one so this will be a few days. I added the specs on your write up btw.

So now I'm just trying to figure out all thats wrong. Cuz my car still has good days and bad days. Sometimes the toque is great and some days it has less pull and throttle response. Could it be all this is related to the ECU? Or because of the mods I need to give the ECU time to adapt?