Guest munchie Posted December 23, 2007 Share Posted December 23, 2007 Hi all, merry christmas. I have a 1994 jap spec twin turbo auto I have a small problem when accelerating under full throttle, sometimes i dont get a rush of power after 3500 rpm and sometimes i do. I have noticed that when i gradually apply the power i get the rush as the revs rise past 3500rpm but if i floor it at say 70mph after cruizing quietly my car changes down and i dont always get maximum power. Tried chasing a ferrari that flew past on the A30, took me about a mile to catch up as the power didn't come on as it should, it felt like the turbo didn't work properly, the ferarri slowed down before a big 3 lane hill and i slowed behind him then accelerated just before him, this time i had enough power to easily pass him up the hill. It's quite annoying, sometimes i dont have enough power to pull away from a moderatly fast car, sometimes i just pull endlessly?? Anyone had this problem or know what it might be? A local garage mentioned it might some kind of valve that doesn't open allowing the 2nd turbo to sipn up correctly? any thoughts? Quote Link to comment Share on other sites More sharing options...
gaz1 Posted December 23, 2007 Share Posted December 23, 2007 yep sounds like the actuator sticking, poss boost leak but doubtfull as this would normaly occur all the time Quote Link to comment Share on other sites More sharing options...
Guest munchie Posted December 23, 2007 Share Posted December 23, 2007 That doesn't sound too bad then, i'll mention it to the garage n see what they say, is it an easy fix? can it be cleaned or just replace the part? Quote Link to comment Share on other sites More sharing options...
gaz1 Posted December 23, 2007 Share Posted December 23, 2007 easy fix unless its the one underneath the turbos, as its a pig to get to, and yes most probably a good clean sorts it Quote Link to comment Share on other sites More sharing options...
Guest PlacentaJuan Posted December 24, 2007 Share Posted December 24, 2007 it is probably the solenoids that control the pressure to open the actuators. these can be refurbished yourself quite easily or pay someone to do it or buy new ones. its a common problem as far as i know Quote Link to comment Share on other sites More sharing options...
Stevie72 Posted December 24, 2007 Share Posted December 24, 2007 I have excatly the same problem happens only a few times and therefore die to other expenses will leave until the new year. I once got left behind by a Ford escort GTI - now that was f....ing embarrassing!!!!! Type in VSV on the thread search and there is a huge article on what the problems is.. Quote Link to comment Share on other sites More sharing options...
Chris and Alana Posted December 24, 2007 Share Posted December 24, 2007 I used to have this problem and it turned out to be the wastegate vsv was broke, changed it with a second hand one for £33 and the problem was solved hope its as simple for you. Quote Link to comment Share on other sites More sharing options...
Chris and Alana Posted December 24, 2007 Share Posted December 24, 2007 here's a link to a web page that may help you find your problem, I think it's someone's site from here it's very usefull though. http://www.max-boost.co.uk/max-boost/supra/turbo.htm There is a section at the bottom that has EBV EGCV IACV WGV next to Mr T. Click on one at a time and it will tell you how to test the vsv's to see if they are broke or not. Good luck Quote Link to comment Share on other sites More sharing options...
dwayne Posted December 24, 2007 Share Posted December 24, 2007 i have that problem sometimes. i just take my foot off the accelerator and put it back on again. i'm solving mine by going single:eyebrows: Quote Link to comment Share on other sites More sharing options...
colsoop Posted December 25, 2007 Share Posted December 25, 2007 I had this issue changing the wastegate vsv sorted it out, quite simple to swap out too. Quote Link to comment Share on other sites More sharing options...
AndyT Posted December 25, 2007 Share Posted December 25, 2007 here's a link to a web page that may help you find your problem, I think it's someone's site from here it's very usefull though. http://www.max-boost.co.uk/max-boost/supra/turbo.htm There is a section at the bottom that has EBV EGCV IACV WGV next to Mr T. Click on one at a time and it will tell you how to test the vsv's to see if they are broke or not. Good luck Cracking site. Thanks peeps. Quote Link to comment Share on other sites More sharing options...
supraGZaerotop Posted May 21, 2008 Share Posted May 21, 2008 (edited) hello, so just what is the car suppose to feel like when it hits 4000rpm, ive got jdm TT auto, is it suppose to kick you you up the a#s big time or what because when i step on the loud peddle hard in my auto it really goes. then sometimes when the car accelerates up around the 4000rpm mark it dont seem to do anything right away, i dont know if its just me and my imagination or what. is it all on how you drive the auto, ie if you want it to go you push the throttle to the floor or do you think there be something up , ie, vsvs, i want to change my o2 sensor because mot'd my car yesterday and at first it would not go thru the emissions, at the last 30secs or so the readings came right down to the point that the guy said it seemed to under fuel a little. or and at the moment i use 95ron Edited June 14, 2008 by supraGZaerotop (see edit history) Quote Link to comment Share on other sites More sharing options...
ShamelessTT Posted May 21, 2008 Share Posted May 21, 2008 hello, so just what is the car suppose to feel like when it hits 4000rpm, ive got jdm TT auto, is it suppose to kick you you up the a#s big time or what because when i step on the loud peddle hard in my auto it really goes. sometimes then when im just cruising i start to gently put my foot down so that the car accelerates up around the 4000rpm mark and dont seem to do anything, i dont know if its just me and my imagination or what. is all on how you drive in an auto, ie if you want it to go you stamp on the throttle or do you think there be something up , ie, vsvs, i want to change my o2 sensor because mot'd my car yesterday and at first it would not go thru the emissions, at the last 30secs or so the readings came right down to the point that the guy said it seemed to under fuel a little. or and at the moment i use 95ron ECU makes the decision to open value to number 2 doesnt it?, so it knows how much throttle is applied etc, and if theres enough to get the second one going etc etc. Also theres what gear its in, and if kick down comes into play. Si Quote Link to comment Share on other sites More sharing options...
supraGZaerotop Posted May 21, 2008 Share Posted May 21, 2008 (edited) yeah thats what i was thinking to be honest, i dont really know how the TT is suppose to pull my self, had car maybe 8weeks or so, if i set off in an aggressive manner it pulls hard, ie no second thoughts on how i want to drive, its fast and thats that and it does go like skink, but sometimes just driving about and want to accelerate away it just dun seem right maybe it just down the fact that its my first auto. people ive spoke to say that the supra TT should just pull no matter what speed your doing, it is kind of hard to explain i find. Edited June 14, 2008 by supraGZaerotop (see edit history) Quote Link to comment Share on other sites More sharing options...
supraGZaerotop Posted May 21, 2008 Share Posted May 21, 2008 (edited) well my car has had a major service, and it does seem to go alot better, plus ive got use to the autobox now and to be honest i dont think there ever was anything wrong with the way the car went, understand now that when you really want an auto to really go youve got to put youre foot right to the floor, Edited June 14, 2008 by supraGZaerotop (see edit history) Quote Link to comment Share on other sites More sharing options...
supraGZaerotop Posted July 28, 2008 Share Posted July 28, 2008 I used to have this problem and it turned out to be the wastegate vsv was broke, changed it with a second hand one for £33 and the problem was solved hope its as simple for you. i have that problem sometimes. i just take my foot off the accelerator and put it back on again. i'm solving mine by going single:eyebrows: Hi all, merry christmas. I have a 1994 jap spec twin turbo auto I have a small problem when accelerating under full throttle, sometimes i dont get a rush of power after 3500 rpm and sometimes i do. I have noticed that when i gradually apply the power i get the rush as the revs rise past 3500rpm but if i floor it at say 70mph after cruizing quietly my car changes down and i dont always get maximum power. Tried chasing a ferrari that flew past on the A30, took me about a mile to catch up as the power didn't come on as it should, it felt like the turbo didn't work properly, the ferarri slowed down before a big 3 lane hill and i slowed behind him then accelerated just before him, this time i had enough power to easily pass him up the hill. It's quite annoying, sometimes i dont have enough power to pull away from a moderatly fast car, sometimes i just pull endlessly?? Anyone had this problem or know what it might be? A local garage mentioned it might some kind of valve that doesn't open allowing the 2nd turbo to sipn up correctly? any thoughts? I have excatly the same problem happens only a few times and therefore die to other expenses will leave until the new year. I once got left behind by a Ford escort GTI - now that was f....ing embarrassing!!!!! Type in VSV on the thread search and there is a huge article on what the problems is.. im sure i have this, was out today for a blast, it happens like almost never but a came on a bypass ealier and foot half pressed down to pull away and nothing, take foot off, back on and im off, very strange, so what you guys think is mostly likely the prob, Quote Link to comment Share on other sites More sharing options...
supraGZaerotop Posted August 6, 2008 Share Posted August 6, 2008 it is probably the solenoids that control the pressure to open the actuators. these can be refurbished yourself quite easily or pay someone to do it or buy new ones. its a common problem as far as i know how do you refurbish them then? just take them off and blast them out with carb/electrial cleanler? Quote Link to comment Share on other sites More sharing options...
Guest PlacentaJuan Posted August 7, 2008 Share Posted August 7, 2008 no you actually drill the case in a special place and beef up the contacts with some solder. theres a guy in melbourne that does it, i havnt done it myself coz i can get him to do it for me. Quote Link to comment Share on other sites More sharing options...
AndyT Posted August 7, 2008 Share Posted August 7, 2008 here's a link to a web page that may help you find your problem, I think it's someone's site from here it's very usefull though. http://www.max-boost.co.uk/max-boost/supra/turbo.htm There is a section at the bottom that has EBV EGCV IACV WGV next to Mr T. Click on one at a time and it will tell you how to test the vsv's to see if they are broke or not. Good luck That's a fabulous site. A real credit to the man. Thanks for the link people. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.