nismo_lp Posted July 31, 2005 Share Posted July 31, 2005 Would either of these problems turn the engine management light and warning on once you bring it back to idle????? Problem 1: I don't get a 2nd turbo rush, it just seems to sit at 0.8bar. The second turbo isn't kicking in. This usually means your IACV isn't opening - the turbo is trying to spin up but can't flow any air, so #1 turbo does all the hard work. By the time #1 turbo is producing 0.8bar at 5000rpm it's way beyond it's efficiency map and is overheating the air and overspeeding the turbine. Try not to do this too often. Problem 2: I don't get a 2nd turbo rush, and as soon as I should it dumps all boost instead. The IACV is opening but the second turbo isn't spinning. All the air boosted by #1 turbo now has an easy path back to the non-pressurised side of the turbos via a non-spinning #2 turbo. In effect, it all goes 'backwards' through #2 instead of going into the engine. You'll maybe see .2 or .3 of a bar of boost but that's about it. This usually means the EGCV isn't opening. The turbo can't spin as it has no exhaust gas flow path. Although annoying, this won't do long-term damage as #1 turbo won't generate much boost because the engine loses a lot of power, so no overspeeding or overheating. Quote Link to comment Share on other sites More sharing options...
osso Posted July 31, 2005 Share Posted July 31, 2005 I've never had the engine management light come on, but last time i had a problem with the 2nd turbo not spinning, and dumping all the boost when it should engage, it turned out to be a blown turbo.... I'd try putting into TTC mode, if you find you dont get any boost whatsoever chances are it is a blown second turbo. one way to stop all your boost from being dumped is to disconnect the IACV pipe, this will probably also confirm a blown second turbo (thats if you find that boost is no longer dumped) Quote Link to comment Share on other sites More sharing options...
SUPRALOOPY Posted July 31, 2005 Share Posted July 31, 2005 sounds like my prob but if i don't give it massive large all is ok so don't think tubbie 2 is blown but i am interested to see what the results are. we should all do different tests and then report to this post or pm:thanks: Quote Link to comment Share on other sites More sharing options...
nismo_lp Posted July 31, 2005 Author Share Posted July 31, 2005 sounds like my prob but if i don't give it massive large all is ok so don't think tubbie 2 is blown but i am interested to see what the results are. we should all do different tests and then report to this post or pm:thanks: will do Quote Link to comment Share on other sites More sharing options...
nismo_lp Posted July 31, 2005 Author Share Posted July 31, 2005 I've never had the engine management light come on, but last time i had a problem with the 2nd turbo not spinning, and dumping all the boost when it should engage, it turned out to be a blown turbo.... I'd try putting into TTC mode, if you find you dont get any boost whatsoever chances are it is a blown second turbo. one way to stop all your boost from being dumped is to disconnect the IACV pipe, this will probably also confirm a blown second turbo (thats if you find that boost is no longer dumped) The second turbo has come online all but say 2 or 3 times!??? Quote Link to comment Share on other sites More sharing options...
SUPRALOOPY Posted July 31, 2005 Share Posted July 31, 2005 The second turbo has come online all but say 2 or 3 times!??? if you don't drop your foot and slowly but not to slowly give it large I.E let no1 come in then press down more as you would for more power does no2 come online?? you will notice no2 coming online 4000 rpm and off you go..there will a power loss just before no2 comes online but after that whoo hoo then try and keep a steady acceleration up to as much as you can..if fcd or tsd not fitted then that will be with the mph conversion about 120 mph then you will hit a brick wall..well thats what it feels like..if that works ok try doing about 60-80 and gunning it if t2 don't come on then back off due to damage thats what i do and try slowly giving it large and see if all is ok....i do not have any warning lights come on but they are my symptoms..lets see how this goes before i take it to some one or if anone takes there car and gets it sorted let us know as if i do i will Quote Link to comment Share on other sites More sharing options...
nismo_lp Posted July 31, 2005 Author Share Posted July 31, 2005 if you don't drop your foot and slowly but not to slowly give it large I.E let no1 come in then press down more as you would for more power does no2 come online?? you will notice no2 coming online 4000 rpm and off you go..there will a power loss just before no2 comes online but after that whoo hoo then try and keep a steady acceleration up to as much as you can..if fcd or tsd not fitted then that will be with the mph conversion about 120 mph then you will hit a brick wall..well thats what it feels like..if that works ok try doing about 60-80 and gunning it if t2 don't come on then back off due to damage thats what i do and try slowly giving it large and see if all is ok....i do not have any warning lights come on but they are my symptoms..lets see how this goes before i take it to some one or if anone takes there car and gets it sorted let us know as if i do i will do you think its got something to do with our 19'' rims??? lol Quote Link to comment Share on other sites More sharing options...
SUPRALOOPY Posted July 31, 2005 Share Posted July 31, 2005 do you think its got something to do with our 19'' rims??? lol Quote Link to comment Share on other sites More sharing options...
nismo_lp Posted July 31, 2005 Author Share Posted July 31, 2005 I've never had the engine management light come on, but last time i had a problem with the 2nd turbo not spinning, and dumping all the boost when it should engage, it turned out to be a blown turbo.... I'd try putting into TTC mode, if you find you dont get any boost whatsoever chances are it is a blown second turbo. one way to stop all your boost from being dumped is to disconnect the IACV pipe, this will probably also confirm a blown second turbo (thats if you find that boost is no longer dumped) Doesnt sound like quite the same symptoms so im pretty sure/hopeing its nothing that extreme... we shall see! Thanks Quote Link to comment Share on other sites More sharing options...
Ian C Posted July 31, 2005 Share Posted July 31, 2005 If you are getting a warning triangle coming up then hopefully you are logging a fault code? Read your stored codes and see if there are any that drop a hint -Ian Quote Link to comment Share on other sites More sharing options...
nismo_lp Posted July 31, 2005 Author Share Posted July 31, 2005 If you are getting a warning triangle coming up then hopefully you are logging a fault code? Read your stored codes and see if there are any that drop a hint -Ian Cheers dude ... will do... ...cant someone tell please tell me thats its something very minor and to stop worrying!??? lol Quote Link to comment Share on other sites More sharing options...
Jurgen-Jm-Imports Posted July 31, 2005 Share Posted July 31, 2005 there is link somewere on diagnostic check Quote Link to comment Share on other sites More sharing options...
nismo_lp Posted July 31, 2005 Author Share Posted July 31, 2005 These are my exact symptoms... new spark plugs for me tomorrow then So Jurgen ... seems you were spot on! http://www.mkivsupra.net/vbb/showthread.php?t=38006&page=1&pp=15&highlight=paper+clip Give it a read supraloopy ... sound the same as yours??? Quote Link to comment Share on other sites More sharing options...
nismo_lp Posted July 31, 2005 Author Share Posted July 31, 2005 there is link somewere on diagnostic check http://www.mkivsupra.net/vbb/showthread.php?t=35920 cant do any damage if u bridge the worng connections can you??? Scared i might fook it up Quote Link to comment Share on other sites More sharing options...
Jurgen-Jm-Imports Posted July 31, 2005 Share Posted July 31, 2005 These are my exact symptoms... new spark plugs for me tomorrow then So Jurgen ... seems you were spot on! http://www.mkivsupra.net/vbb/showthread.php?t=38006&page=1&pp=15&highlight=paper+clip Give it a read supraloopy ... sound the same as yours??? hope so Quote Link to comment Share on other sites More sharing options...
nismo_lp Posted August 1, 2005 Author Share Posted August 1, 2005 Good old 14 on the diagnostics! nothing major then .. hopefully!?? Time to get to them sparkplugs I can understand why you guys enjoy modding/tuning and just serviceing your supes yourselfs... got so much satisfaction from just doing the diagnostics! lol Awesome site! So helpfull ... Thanks guys! Quote Link to comment Share on other sites More sharing options...
SUPRALOOPY Posted August 1, 2005 Share Posted August 1, 2005 hope so and i've read that thread before looks like i'm fooked as i'm showing no fault codes Quote Link to comment Share on other sites More sharing options...
nismo_lp Posted August 1, 2005 Author Share Posted August 1, 2005 Goods a gooden' ... i think... opened her up and the very first clip wasnt in properly! gona take it for a little spin now ... fingers crossed please! Oh and when resetting the ecu i noticed i dont have a ABS number 2 fuse! is this right???? Quote Link to comment Share on other sites More sharing options...
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