Guest JapEmil Posted March 23, 2015 Share Posted March 23, 2015 Hi i dont know what to do with my boost problem on my supra tt in TTC mode! I have an apexi avc-r as a boostcontroller! I have done the permanent ttc mod and wiered! If i set my apexi to 1bar then it holds the boost pretty stable on 0,8 bar! But rush up to 1 bar sometimes! If i put the apexi to like 1,2 bar then it start to overboost as hell to like 1,9 bar, and it goes up and down all time, not stable at all! Anyone had this problem? I have tried RR without cat and RR with cat! Does not help! Could this be the symptomps of a boost leak? Thankful for any help i could get! Im so tierd of it! Sorry for bad english //Emil Quote Link to comment Share on other sites More sharing options...
mellonman Posted March 23, 2015 Share Posted March 23, 2015 have you set the correct start duty ? or even the duty its self , have you done gear learn ? just sound like you need to set it up correctly , if it spikes then turn the duty down lower in the rev range Quote Link to comment Share on other sites More sharing options...
Guest JapEmil Posted March 23, 2015 Share Posted March 23, 2015 i am all newbie on this apex device! i have just got into the Boost/duty settings and played with that! but i just have set the duty and boost the same on all rpm! how does the learn gear thing work? Thank you very much for answer btw! Quote Link to comment Share on other sites More sharing options...
Nic Posted March 23, 2015 Share Posted March 23, 2015 What boost does the car make with the boost controller turned off? I would start by making sure the boost controller is plumbed in correctly, see attached manual. You could then try following these setup instructions http://www.mkivsupra.net/vbb/showthread.php?296140-boost-controller-help-please&p=3728833&viewfull=1#post3728833avcr_manual.pdf Quote Link to comment Share on other sites More sharing options...
Guest JapEmil Posted March 23, 2015 Share Posted March 23, 2015 i were out testing it now! when i turn it off it absolutely stable att 0,8 bar! i tested the setup you linked to and its all the same, unstable as hell! but i notice a thing on the apexi, i watch the boost monitor on the apexi, and it does not show negative pressure only positive? do the apexi only show positive pressure? maybee its not installed right? and when i have the apexi on it seems its not following the boost gauge that i have inte the car right! Quote Link to comment Share on other sites More sharing options...
mellonman Posted March 23, 2015 Share Posted March 23, 2015 http://www.mkivsupra.net/vbb/showthread.php?307162-Advice-needed-on-the-Apexi-AVCR-boost-controller&highlight=apexi+avcr Couple of threads in there that will help you, yes the avcr shows vacuum, you dont have to have the hole duty the same this will not be correct and not stable read the threads and the manual and set it all up correctly and they are a great bit of kit Quote Link to comment Share on other sites More sharing options...
Guest JapEmil Posted March 24, 2015 Share Posted March 24, 2015 hmm okej then it must be something wrong on the install, maybee thats why it so unstable! i is it the solenoid or the pressure sensor that send the boost pressure signal to the apexi? Quote Link to comment Share on other sites More sharing options...
mellonman Posted March 24, 2015 Share Posted March 24, 2015 The pressure sensor mate , it should have a filter and fitted upright it changes the preasure value into a eletrical signal - - - Updated - - - The pressure sensor mate , it should have a filter and fitted upright it changes the preasure value into a eletrical signal Quote Link to comment Share on other sites More sharing options...
Guest JapEmil Posted March 24, 2015 Share Posted March 24, 2015 The pressure sensor mate , it should have a filter and fitted upright it changes the preasure value into a eletrical signal - - - Updated - - - The pressure sensor mate , it should have a filter and fitted upright it changes the preasure value into a eletrical signal My pressure sensor is connected with a T to the hose that goes to the turbo with no air filter! I know it says in the manual that it should be connected to the fuel regulator but does it really matter? Quote Link to comment Share on other sites More sharing options...
mellonman Posted March 24, 2015 Share Posted March 24, 2015 (edited) clearly it does lol. at the turbo side it wont see vacuum , your boost referance needs to come from after the throttle body on the intake side to get a correct reading. do everything the manual says and you wont go wrong , im very sure apexi know more about how to fit there own unit then you do . Edited March 24, 2015 by mellonman (see edit history) Quote Link to comment Share on other sites More sharing options...
Mk4Gaz Posted March 24, 2015 Share Posted March 24, 2015 Your solenoid should be connected between the 1st turbo and actuator. Your boost pressure reference line, should t into either the map sensor, fpr, or another take off on the inlet manifold, after the throttle body mate Quote Link to comment Share on other sites More sharing options...
Guest JapEmil Posted March 24, 2015 Share Posted March 24, 2015 Changed it at put it on the fuel regulator hose! now i get it more stable Shame on me Thanks for the help mellonman. it says in the manual that you would turn the OEM boost solenoid off! which is the poem ones? is it the vsv? just unplug it? Quote Link to comment Share on other sites More sharing options...
mellonman Posted March 24, 2015 Share Posted March 24, 2015 (edited) You have to unplug the one in the middlish and loop the vac pipes, iirc its clearly in the manual with a before and after picture page 47 dude Edited March 24, 2015 by mellonman (see edit history) Quote Link to comment Share on other sites More sharing options...
Guest JapEmil Posted March 25, 2015 Share Posted March 25, 2015 The apexi was installed when i bought the supra! but now i read the manual very very carefully and unplugged the oem solenoid too! now i can put whatever boost pressure i want and get i perfectly stable in every gears now i am a very happy man Thanks for allt the help guys! problem solved! Quote Link to comment Share on other sites More sharing options...
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