help needed
02 July 2011, 08:34 PM
#1
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help needed
hi i need some help i own a classic 1998 wrx sti ver 5 import
today it was driving fine ...........
i was told to change the manual boost controller as there crap!!!!! so i bought a 2nd hand factory fit unit to put back on after doing this took it for a drive and it was jumping as it hit boost
so thought it was faulty
changed it back to manual boost controller and its still doing it .....
wtf is going on
can anyone help me ?
today it was driving fine ...........
i was told to change the manual boost controller as there crap!!!!! so i bought a 2nd hand factory fit unit to put back on after doing this took it for a drive and it was jumping as it hit boost
so thought it was faulty
changed it back to manual boost controller and its still doing it .....
wtf is going on
can anyone help me ?
02 July 2011, 09:48 PM
#2
STi Version 4 = Sep 97 to Aug 98
STi Version 5 = Sep 98 to Aug 99
Which is it, just to square that away? Is the coilpack in the centre, or on the passenger side of the inlet manifold?
A take it you mean you junked the MBC and refitted the OEM 2-port boost solenoid?
Have you connected it up correctly? Is the restrictor pill in the short piece of vac pipe between the compressor nipple outlet and the T-piece, as well?
STi Version 5 = Sep 98 to Aug 99
Which is it, just to square that away? Is the coilpack in the centre, or on the passenger side of the inlet manifold?
A take it you mean you junked the MBC and refitted the OEM 2-port boost solenoid?
Have you connected it up correctly? Is the restrictor pill in the short piece of vac pipe between the compressor nipple outlet and the T-piece, as well?
02 July 2011, 11:36 PM
#3
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sti ver 5 98 / 99 coil pack in middle and 3 port boost solenoid and yes still got the pill fitted !!! could do with some pics of where all the pipes go so i could check em all !!!!
03 July 2011, 01:03 PM
#6
You prob have an after market 3-port such as a Perrin or Apexi item.
After market ones usually have their ports labelled:-
"NO" = normally open
This connection goes to the compressor cover's outlet nipple.
"COM" = common
This connection goes to the wastegate actuator.
"NC" = normally closed
This connection is left VTA... Or back to the air intake, upstream of the turbo i.e. the filter side, not the IC side.
(If left VTA, make sure the appropriate unused vac return port on the air intake is bunged off.)
After market ones usually have their ports labelled:-
"NO" = normally open
This connection goes to the compressor cover's outlet nipple.
"COM" = common
This connection goes to the wastegate actuator.
"NC" = normally closed
This connection is left VTA... Or back to the air intake, upstream of the turbo i.e. the filter side, not the IC side.
(If left VTA, make sure the appropriate unused vac return port on the air intake is bunged off.)
Last edited by joz8968; 03 July 2011 at 07:05 PM.
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04 July 2011, 07:17 PM
#8
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do anyone have any pics or illustrations of where all these pipes are meant to go on the engine and sensors etc reckon 1 of the kids may of changed a few around grrrrrrrr
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