I recently bought a evo8 vehicle has some aftermarket parts on it. At idle I run 14.5 to 15 air fuel ratio. However at wot it drops to 10 to 1 or lower. My ad gauge only goes to 10 to 1. I also have the the 3 lights on for my acd. Pretty sure the pump is shot. New to the evo world. Any help in the area would be great.

 

I am no expert by any means, but that is a pretty common AFR for WOT with the stock rom. My ACD pump lights up all three lights at random, but usually goes back to normal after a fresh start. Have you tried to bleed the ACD system? I would say read a lot!! I have been playing with tuning for 2 years now and the more I read the more I feel like a novice. I hardly ever post on here, but I noticed that you lived close so thought I would say hello.

 

I have bled the system, checked the relay. Relay is good, system will not bleed pump will not kick on. So my next move is the acd module and replacement of the pump. Does anyone know of someone selling a pump? Cheapest I have found is $600 bucks on ebay.