M4RK RZ Posted May 12, 2004 Share Posted May 12, 2004 Got a problem with the second turbo kicking in, it seems to be doing it sometimes and not others. Ive just got the car about 1 month ago and had a look round properlyl ast to find that one of the black metal black pipes that runs over the top of the outlet side( in a group of four welded together ) has been sheared by the strut brace they fitted. There was a peice of repair pipe fitted to it but it was a bodge job could it be that? looks like it controls a diaphram (small black round inclosed box) also on the turbo side of things. But then again it kicks in sometimes and other times I can rev straight through 2 or 3 or 4th without the second one kicking in at all It also seems to idle a little lumpy at times:conf: any help would be great cheers Link to comment Share on other sites More sharing options...
Guest Terry S Posted May 12, 2004 Share Posted May 12, 2004 Maybe a VSV fault. Not sure how far you are from Chris Wilson, or Pete Betts. It's not a major problem more a PITA. Link to comment Share on other sites More sharing options...
M4RK RZ Posted May 12, 2004 Author Share Posted May 12, 2004 cheers mate, im good mates with boostie off here so i think hes gonna have a look with me but thought ide throw the question up see what people thought, any other suggestions? and what is VSV short for? Link to comment Share on other sites More sharing options...
Guest Terry S Posted May 12, 2004 Share Posted May 12, 2004 very basically it is a solenoid valve. Do a search, pretty sure it will have been covered in depth on here before. Good luck Link to comment Share on other sites More sharing options...
Chris Wilson Posted May 12, 2004 Share Posted May 12, 2004 I don't suppose you know what make the speedo convertor is (to change to MPH and maybe to remove the top speed limiter), or who fitted it? I believe that certain speed limiter installations can cause this, and am investigating cars with similar problems. Link to comment Share on other sites More sharing options...
M4RK RZ Posted May 12, 2004 Author Share Posted May 12, 2004 im not sure to be honest, infact its still in km the total miliage till its altered but the speedo and lights are all altered already. The limiter has also been taken off but im not sure what make it all is. Link to comment Share on other sites More sharing options...
mark brown Posted May 12, 2004 Share Posted May 12, 2004 Chris Funny you should mention speedo conversions in connection with this. If I recall correctly some 4 years ago when I got my Supra, the conversion had been done so that the divided signal was being fed to everything , speedo, odo, cruise, ECU, P Steering , Air con etc and I occasionally had this problem, but ignored it. I changed this 2 years ago so that the divided signal only feeds the speedo and cruise (ODO reads miles fine from the undivided signal if modified to show miles or UK ODO used) with everything else receiving the undivided signal so that it responds as it was designed to do and I've had no recurrence. Maybe just coincidence, but would feeding a divided signal to the ECU cause this problem i.e cause the ECU occasional confusion? Mark Brown Link to comment Share on other sites More sharing options...
JamesArup Posted May 12, 2004 Share Posted May 12, 2004 Now that I've read this, it's worth mentioning that I think my car's been doing this too. Sometimes you feel the first turbo come on, you prepare for the second one, and nothing. It feels 'flat' and 'dead' ... sometimes when I lift of the throttle and try again, but apply the accelerator smoothly (rather than burying it into the footwell ), the second turbo will come on, and off we go I have attached a piccy of my speedo convertor (if it helps). I'm on the Dyno's at Abbey on Tuesday next week, so maybe that will show something ... unless I am imagining it! Cheers, J Link to comment Share on other sites More sharing options...
Chris Wilson Posted May 13, 2004 Share Posted May 13, 2004 I'd change it to one of Pete Betts (TRL Performance) ones, and fit it STRICTLY in accordance with the details on his web site. For the price it's worth removing this possible cause of your problem. I personally haven't had a car with a TRL unit correctly wired up give this lazy second turbo fault, but I have only recently become aware of this seemingly odd potential cause of it (thanks Bill...) Link to comment Share on other sites More sharing options...
ChrisB Posted May 13, 2004 Share Posted May 13, 2004 Mine does this sometimes aswell but its a uk car, maybe the vsv thingy, will try and sort it one day, why are all the supra people down south lol Link to comment Share on other sites More sharing options...
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