ok guys I have an 04 evo 8 on aem ems v1...26 psi on evo 9 turbo with other bolt ons...car used to run fine and sti does really but went wot sat night and noticed in 3rd afr went to 13 and started dropping to 12.x...car used to be a steady 10.8 - 11 or so at wot...hit 4th and got on it for a sec and it hit 12 .4 or so and dropped to 11.8...I was wondering if maybe there's a way to check fuel pump to see if it's going bad...I'm going to do a boost leak test and check for exhaust leaks before the o2...tuner says it shouldn't be the tune...any ideas?

 

anyone?

 

Pull a log

 

how do I do that

 

Download Evoscan. Do you have 1.3u tactrix cable?

 

im not on stock ecu im on aem ems...

 

wow dude, it's dangerously lean. dont go wot anymore until you figure it out.

 

yeah I know...I found a massive boost leak where the compressor housing bolts to lower ic pipe...that gasket went out...ordered 2 from mitsu...tuner said that's my problem...I always thought boost leak causes rich condition...I'm on aem so no maf sensor and I thought on sd it wouldn't matter...I still think it's something else maybe fuel pump or something...tried to tape a fuel gauge to the windshield but realized the evo has no shraeder valve wtf...I have an aem fuel rail in the closet so I'm throwing that on with a fuel pressure gauge...let's see