Youngy Posted June 21, 2016 Share Posted June 21, 2016 as above my boost is all over the place because in first gear it will boost to 11 psi but in second it goes to 13 psi then the rest it goes to 15 psi is there a reason for this Quote Link to comment Share on other sites More sharing options...
Buggyeye Posted June 21, 2016 Share Posted June 21, 2016 Boost controller? Might be the waste gate. Any mods? Quote Link to comment Share on other sites More sharing options...
Youngy Posted June 21, 2016 Author Share Posted June 21, 2016 all its got is a cobra back box,cone filter and the previous owner said it was mapped but I have no proof but it had the original boost controller and iv fitted a manual one and its still the same Quote Link to comment Share on other sites More sharing options...
kayzarh Posted June 22, 2016 Share Posted June 22, 2016 try and clean the maf5 Quote Link to comment Share on other sites More sharing options...
Scoobyghost Posted June 22, 2016 Share Posted June 22, 2016 Any ecu codes popping up? Could be an air leak or a dirty boost solenoid. Quote Link to comment Share on other sites More sharing options...
GeoffLeggy Posted June 22, 2016 Share Posted June 22, 2016 Is it always the same in each gear and is it smooth? Mine boosts higher in 3rd 4th as the load period increases. As long as it's not fluctuating. If it's been mapped then cool. Quote Link to comment Share on other sites More sharing options...
Scoobyghost Posted June 22, 2016 Share Posted June 22, 2016 Is it always the same in each gear and is it smooth? Mine boosts higher in 3rd 4th as the load period increases. As long as it's not fluctuating. If it's been mapped then cool. True that, mines does the same in higher gears. Quote Link to comment Share on other sites More sharing options...
Youngy Posted June 22, 2016 Author Share Posted June 22, 2016 It's really smooth with no problems at all with no loss of power Quote Link to comment Share on other sites More sharing options...
GeoffLeggy Posted June 22, 2016 Share Posted June 22, 2016 No worries then by the sounds of it Quote Link to comment Share on other sites More sharing options...
savage bulldogs Posted June 22, 2016 Share Posted June 22, 2016 It's quite common to get different max boost levels in each gear . if your in 1st going downhill at 3k rpm using half throttle they'll be less pressure in the manifold than being in 5th at 3k going uphill using full throttle. This difference in inlet manifold pressure will affect the pressure in the vacuum lines that operate the boost control system (giving under boost or over boost) I dare say you've either got a decat downpipe or someone has removed the ristrictor pill that subaru put in the boost control vac line system to stop vac line pressure variations [emoji6] If it's not broke .....upgrade it 😊 Quote Link to comment Share on other sites More sharing options...
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