I have a EVO MR8 camed 273, 3" turbo back pipe short ram kit, head work, ARP head bolts and studs, oversized intercooler, 255 Walbro pump. The person I bought it from told me he had the ECM flashed and tuned by a friend who is not able to do it any more?
When I am coasting in neutral the RPM sticks at 4K. It only drops out when I step on the clutch. The Mitsubish shop told me "There is nothing we can find wrong other than that?" For a 300 mile round trip to the Mitsu shop I felt screwed! Any ideas or such.

 

Try a mail in tune. Check out TTP.

 

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