stevo0525GT Posted December 3, 2012 Share Posted December 3, 2012 Here a list of current mods Fp black turbo w fp inlet Cobb sf intake Pe 850cc inj Walboro 255 lph fuel pump Borla headers Perrin up pipe and down pipe (catless) Grimmspeed mbc Tial q bov Cobb ap2 Brakes wheels etc.... Anyways I took it to Mac autosport Last week and we put it on the dyno and it was running fine and as he Started to creep up with power it would all of a sudden run very lean. So he added more fuel but it still did the same thing repeatedly. So we ended up leaving it with a Lil less power until we could move up safely without the drop in fuel. But anyone have any idea what it could be? Any ideas? Possibly exhaust leak? Link to comment Share on other sites More sharing options...
06silvarubiLGT Posted December 3, 2012 Share Posted December 3, 2012 Sounds like intake leak. I would boost leak test it. Sounds like it gets worse as turbo pressurizes' system. What type of intercooler you got? Link to comment Share on other sites More sharing options...
stevo0525GT Posted December 3, 2012 Author Share Posted December 3, 2012 Mts intercooler and I have done a boost leak test and it didnt show any leak and i pushed it to 30 psi. And if it was a boost leak wouldn't that cause it to run rich not lean? Link to comment Share on other sites More sharing options...
Max Capacity Posted December 3, 2012 Share Posted December 3, 2012 Have you posted this inthe Tuning Forum, or asked the person who tuned it ? 305,600miles 5/2012 ej257 short block, 8/2011 installed VF52 turbo, @20.8psi, 280whp, 300ftlbs. (SOLD). CHECK your oil, these cars use it. Engine Build - Click Here Link to comment Share on other sites More sharing options...
stevo0525GT Posted December 3, 2012 Author Share Posted December 3, 2012 Yes I asked the person who tuned it he said prob exhaust leak. I was just trying to get another opinion Link to comment Share on other sites More sharing options...
06silvarubiLGT Posted December 3, 2012 Share Posted December 3, 2012 normally intake and exhaust leaks cause cars to run lean since its unmonitored air entering the system, there-fore computer doesnt compensate for it. I could be wrong, but I would def post in tuning forum or PM some of the guys that do e-tunes Link to comment Share on other sites More sharing options...
cryo Posted December 3, 2012 Share Posted December 3, 2012 Did you verify you were not loosing fuel pressure and the regulator was adding 1:1? Gas or e85? Dave [sIGPIC][/sIGPIC] Providing unmatched customer service and a Premium level of Dyno/E-tuning to the Community cryotuneperformance@yahoo.com facebook.com/cryotuneperformance. Link to comment Share on other sites More sharing options...
stevo0525GT Posted December 3, 2012 Author Share Posted December 3, 2012 Yes did verify that and it was 91 Link to comment Share on other sites More sharing options...
cryo Posted December 28, 2012 Share Posted December 28, 2012 Did you get this sorted out? Dave [sIGPIC][/sIGPIC] Providing unmatched customer service and a Premium level of Dyno/E-tuning to the Community cryotuneperformance@yahoo.com facebook.com/cryotuneperformance. Link to comment Share on other sites More sharing options...
stevo0525GT Posted January 16, 2013 Author Share Posted January 16, 2013 Yes I believe so I need to install my wideband to get more accurate readings. But my transmission just shat out on me and 3rd and 4th is not working so I have another issue there. Let me know if you know anything bout transmissions! Link to comment Share on other sites More sharing options...
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