I have an 05MR and In 6th gear at about 4K at WOT The mitsu Gauge spikes past 1.5 and pins its self there for a second before it tapers and the computer seems to regain control. The only mod i have is a AMS catless turbo back??? Should i be worried? On my STI I know that i had to port the wastegate because of the same problem once a turbo back was installed.Any one have similar issues?

 

Bump!!!

 

I noticed this too with my 05 MR, but then I have a Dynoflash ecu, and TBE. Hmmm..

 

No, you should not worried. If you are running 93 octane or better you will be fine.

 

It's natural to spike high in a higher gear at low rpm due to the amount of load. The downpipe reduces back pressure, which causes a higher-than-stock boost spike. You should be OK on pump gas, but it's probably causing the ECU to pull a ton of timing. I recommend not rolling into boost from low rpm in 6th gear...it's just not good for the car.

 

I know why it happens but is there enough room for the injectors to compensate. Where is fuel cut on these cars???