Guest vazoosh Posted September 4, 2008 Share Posted September 4, 2008 Not even looked at it again to be honest lol. Really can't be bothered with it, it was getting me down. Ha ha, you don't want to be driving around like that for too long do you? I was like you at first getting all down but hopefully i've got to the bottom of it now, All will be revealed sometime next week if the new IACV vsv does the trick! Quote Link to comment Share on other sites More sharing options...
bigbloodyturbo Posted September 4, 2008 Share Posted September 4, 2008 Ordered the vsv yesterday, it was £91.45 inc VAT. I just hope this is the problem as i don't want to have wasted the money. I'm quite sure my original vsv isn't operating correctly as the air didnt flow from one port to another. IACV vsv Part No. T90910-12126 Well i'm going to have to get one now because my supra almost killed me 20 mins ago. the car infornt of me pulled out to pass a tractor so i just followed him, only problem was i didn't see the lorry coming the other way, ok no problem i thought, i'll give the right foot a kick and we'll be fine BIG MISTAKE. It kicked down a gear and the revs jumped up but the second turbo never came in and i almost stopped accelerating, bloody shat myself and looked like a c0ck all at the one time Quote Link to comment Share on other sites More sharing options...
miko_supra Posted September 8, 2008 Share Posted September 8, 2008 i have this whole dropping down a gear and no second turbo coming in issue...Im interested to see what resolves this Quote Link to comment Share on other sites More sharing options...
SupraHuman Posted September 8, 2008 Share Posted September 8, 2008 i have this whole dropping down a gear and no second turbo coming in issue...Im interested to see what resolves this Get an auto.Problem solved. Quote Link to comment Share on other sites More sharing options...
bigbloodyturbo Posted September 8, 2008 Share Posted September 8, 2008 (edited) mines an auto and it still does it *edit* i meant to say auto Edited September 8, 2008 by bigbloodyturbo (see edit history) Quote Link to comment Share on other sites More sharing options...
miko_supra Posted September 9, 2008 Share Posted September 9, 2008 Get an auto.Problem solved. rather shoot myself Quote Link to comment Share on other sites More sharing options...
bigbloodyturbo Posted September 9, 2008 Share Posted September 9, 2008 rather shoot myself You would rather shoot yourself than have an auto turbo yet you willingly bought an na:p Quote Link to comment Share on other sites More sharing options...
miko_supra Posted September 10, 2008 Share Posted September 10, 2008 You would rather shoot yourself than have an auto turbo yet you willingly bought an na:p Yup! although its actually a tt Quote Link to comment Share on other sites More sharing options...
razza Posted September 10, 2008 Share Posted September 10, 2008 I've never really had this, normally I can see when I would need to drop the gear, i.e. getting ready to overtake, take the o/d off which drops it, holding the revs up, which means the turbo is quicker to respond and spool when you floor it. When I have floored it to drop the gear it's not been a problem on spooling Quote Link to comment Share on other sites More sharing options...
miko_supra Posted September 10, 2008 Share Posted September 10, 2008 who else has an issue with the second turbo not kicking in in first gear too? Quote Link to comment Share on other sites More sharing options...
cwtt Posted September 10, 2008 Share Posted September 10, 2008 Check these things IACV VSV IACV actuator EGCV vsv EGCV actuator all the vacuum lines (they must be in exactly the right order and have no rips or tears) Make sure you are testing the correct ones. For example the EBV vsv is right next to the IACV, however it is only for pre-spooling the turbo. It doesnt actaully turn the second turbo on like the IACV does. Quote Link to comment Share on other sites More sharing options...
bigbloodyturbo Posted September 10, 2008 Share Posted September 10, 2008 doesn't the EBV act as a secondary/complementary wastegate aswell? Quote Link to comment Share on other sites More sharing options...
cwtt Posted September 10, 2008 Share Posted September 10, 2008 doesn't the EBV act as a secondary/complementary wastegate aswell? NO. This is a missconception. All the EBV does is pre-spool the second turbo. Quote Link to comment Share on other sites More sharing options...
bigbloodyturbo Posted September 10, 2008 Share Posted September 10, 2008 we need to adjust our FAQ section then EGBV This allows some exhaust gas to bypass the EGCV and join the output of the first turbo. It serves two purposes - one, it prespools the second turbo by allowing some exhaust gas flow through it. Two, it controls the amount of exhaust gas going through the first turbo in much the same way as a wastegate - therefore controlling the maximum boost pressure generated by #1 turbo. Quote Link to comment Share on other sites More sharing options...
cwtt Posted September 10, 2008 Share Posted September 10, 2008 (edited) we need to adjust our FAQ section then EGBV This allows some exhaust gas to bypass the EGCV and join the output of the first turbo. It serves two purposes - one, it prespools the second turbo by allowing some exhaust gas flow through it. Two, it controls the amount of exhaust gas going through the first turbo in much the same way as a wastegate - therefore controlling the maximum boost pressure generated by #1 turbo. First of all it is "EBV" exhaust bypass valve. It allows exhaust gases to bypass the first turbo and pre-spool the second turbo. This helps get the second turbo spinning so that the turbine is not slammed with exhaust gases at 3800rpms when the second turbo comes online. This is one of the reasons why the second turbos go out first. People don't know their EBV vsv or EBV actuator have gone bad and the second turbo is no longer getting pre-spooled. After a while, the second turbo goes out because it is getting slammed with exhaust gases instead of easily spinning up the turbine. Does that make sense? Your FAQ should say this taken from http://www.97supraturbo.com "Exhaust Bypass Valve (EBV): This controls the prespool of the #2 Turbo prior to full transition. It also has a VSV and Actuator that is controlled by the ECM. It is a linear acting actuator that starts to open at about 10.2 Psi and it is fully open around 14 Psi. As it opens, it starts the compressor blades spinning on the #2 turbo so by the time the actuator is fully opened the #2 has enough velocity to have a “smooth” transition at time of full boost. Typical boost characteristics will show peak psi at or around 10Psi starting 2200rpms to 2500rpms, holding there until 3300-3600rpms. Then a slight dip in boost just prior to full transition. After full transition (around3800 rpms}, the EBV system is non functional." Edited September 10, 2008 by cwtt (see edit history) Quote Link to comment Share on other sites More sharing options...
AndyT Posted September 10, 2008 Share Posted September 10, 2008 First of all it is "EBV" exhaust bypass valve. It allows exhaust gases to bypass the first turbo and pre-spool the second turbo. This helps get the second turbo spinning so that the turbine is not slammed with exhaust gases at 3800rpms when the second turbo comes online. This is one of the reasons why the second turbos go out first. People don't know their EBV vsv or EBV actuator have gone bad and the second turbo is no longer getting pre-spooled. After a while, the second turbo goes out because it is getting slammed with exhaust gases instead of easily spinning up the turbine. Does that make sense? Your FAQ should say this taken from http://www.97supraturbo.com "Exhaust Bypass Valve (EBV): This controls the prespool of the #2 Turbo prior to full transition. It also has a VSV and Actuator that is controlled by the ECM. It is a linear acting actuator that starts to open at about 10.2 Psi and it is fully open around 14 Psi. As it opens, it starts the compressor blades spinning on the #2 turbo so by the time the actuator is fully opened the #2 has enough velocity to have a “smooth” transition at time of full boost. Typical boost characteristics will show peak psi at or around 10Psi starting 2200rpms to 2500rpms, holding there until 3300-3600rpms. Then a slight dip in boost just prior to full transition. After full transition (around3800 rpms}, the EBV system is non functional." Lovely. Language I can understand. Quote Link to comment Share on other sites More sharing options...
bigbloodyturbo Posted September 10, 2008 Share Posted September 10, 2008 *edit* i dont even understand what i just wrote Quote Link to comment Share on other sites More sharing options...
AndyT Posted September 10, 2008 Share Posted September 10, 2008 *edit* i dont even understand what i just wrote Quote Link to comment Share on other sites More sharing options...
firin Supra Posted September 11, 2008 Share Posted September 11, 2008 "Ha ha, you don't want to be driving around like that for too long do you? I was like you at first getting all down but hopefully i've got to the bottom of it now, All will be revealed sometime next week if the new IACV vsv does the trick!" "Vasoosh" Did you manage to get to the bottom of this problem? I too have an JZ161Aristo and am experiencing the same problem. I have changed the valve in question and am still experiencing the same problem. But on my car the exhaust note changes and it goes loud and you get a rattly sound coming from under the car. If Im driving the car and this happens I get a loss of power, but no warning lights. If i switch off the car for a few seconds and start it again it goes away and all is normal......Just wondering if you are experiencing these problems too....by the way sorry for the hijack guys... Quote Link to comment Share on other sites More sharing options...
cwtt Posted September 11, 2008 Share Posted September 11, 2008 "Ha ha, you don't want to be driving around like that for too long do you? I was like you at first getting all down but hopefully i've got to the bottom of it now, All will be revealed sometime next week if the new IACV vsv does the trick!" "Vasoosh" Did you manage to get to the bottom of this problem? I too have an JZ161Aristo and am experiencing the same problem. I have changed the valve in question and am still experiencing the same problem. But on my car the exhaust note changes and it goes loud and you get a rattly sound coming from under the car. If Im driving the car and this happens I get a loss of power, but no warning lights. If i switch off the car for a few seconds and start it again it goes away and all is normal......Just wondering if you are experiencing these problems too....by the way sorry for the hijack guys... You hear a rattling sound? I would bet money that your egcv actuator is loose/broken. It controls the flap that is inside the exhaust. When it is broken or loose it rattles around. This would also cause weird problems with the number two turbo coming online. Quote Link to comment Share on other sites More sharing options...
Mike M Posted September 11, 2008 Share Posted September 11, 2008 who else has an issue with the second turbo not kicking in in first gear too? Me but I've changed to TTC to get rid of the problem. I think its the EGCV or EGBV not reacting quick enough. I tested both on the car with the compressor and the EGBV was slow to open. Exercising it helped with some 3 in 1 on the actuator. When my connector fell off the EGCV vsv the 2nd tubby would refuse to kick in and at 4k the engine was slow to rev harder. Quote Link to comment Share on other sites More sharing options...
Guest vazoosh Posted September 11, 2008 Share Posted September 11, 2008 "Ha ha, you don't want to be driving around like that for too long do you? I was like you at first getting all down but hopefully i've got to the bottom of it now, All will be revealed sometime next week if the new IACV vsv does the trick!" "Vazoosh" Did you manage to get to the bottom of this problem? I too have an JZ161Aristo and am experiencing the same problem. I have changed the valve in question and am still experiencing the same problem. But on my car the exhaust note changes and it goes loud and you get a rattly sound coming from under the car. If Im driving the car and this happens I get a loss of power, but no warning lights. If i switch off the car for a few seconds and start it again it goes away and all is normal......Just wondering if you are experiencing these problems too....by the way sorry for the hijack guys... Hey there, i just replaced the IACV vsv this afternoon and took the car for a spin.....unfortunately the problem is still there:( My Aristo rattles as well under the car which seems to be the exhaust(it used to be fine). I wonder if we are experiencing the same problems...seems like it. Its back to the drawing board. I did test the IACV vsv and it did appear to be not operating correctly so thats why i replaced it. I'm quite sure its not the EGCV as i've tested this also and all the tests showed me it was fine. Now i'm wondeing if its the EBV vsv or one of the actuators. If you get any answers or fix the problem please give me a shout and i'll do the same for you. This is getting very very frustrating!! Quote Link to comment Share on other sites More sharing options...
cwtt Posted September 11, 2008 Share Posted September 11, 2008 The EBV only pre-spools the turbo, nothing else. So you can rule that out. You are 100% positive that the EGCV VSV and EGCV actuator are working? Quote Link to comment Share on other sites More sharing options...
Guest vazoosh Posted September 12, 2008 Share Posted September 12, 2008 (edited) The EBV only pre-spools the turbo, nothing else. So you can rule that out. You are 100% positive that the EGCV VSV and EGCV actuator are working? I tested the EBV anyway and it seems to be fine, i didn't think this had anything to do with my problem. I have also tested the EGCV vsv and that seems fine also, i'm not sure about the EGCV actuator, is there anyway of testing this? In addition to this i have a Blitz i colour boost controller which was installed by someone and i am wondering whether it is installed correctly,it seems to be ok after cross referencing with the guides on here. I have a query though, yesterday when installing the new IACV vsv i noticed the pipe that is supposed to be on port E of the EBV VSV has been taken off and capped. Whoever installed my boost controller must have done this and to my knowledge this should not be the case. I am now wondering if they have done something to the EBV actuator as well. I can't seem to find the EBV actautor, will i need to get under the car to locate it? I am now wondering whether this is my probelm? Edited September 12, 2008 by vazoosh addition (see edit history) Quote Link to comment Share on other sites More sharing options...
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