My friend has an Evo IX and installed an overlay on his cluster, now the MPH reads about 20 MPH Under. If were going 40 it says 20. I checked his speed sensor and its reading fine, (Plugged into evoscan and ran a log). What can be causing the problem? I checked all the wiring everything seems fine.. Any ideas?

 

He put the dial in incorrectly


I had the same happen with my car when a buddy tried putting in the overlay as well.

Your suppose to put them in at rest afaik

 

had this same problem, once you remove the dial its hard to get it exactly where it was. Ill never remove mine again because of this issue. Drove me nuts.

 

They claim they did not remove it, maybe they shifted it on accident? How do you fix it?

 

pull it off and do it again

 

Ovrlays arent worth it for this reason. Hope you fix.

 

I agree completely. I would never install one on my car