Graham Rudd Posted August 7, 2002 Share Posted August 7, 2002 I've got a couple of problems with my Soop, hopefully someone will be able to shed some light on them. Problem one: This generally only happens in second/third gear, if I floor it then ease off, even *slightly*, I will get a crazy amount of engine breaking, then if I even think about changing the amount of gas I'm giving it I will get a HUGE surge in acceleration. It can happen two or three times rapidly, and its extremely violent. Imagine it as throwing a parachute out the back, then hitting the button for the booster rocket, which is obviously hidden in the back somewhere. Whatever is happening, it certainly makes a mockery out of trying to modulate the throttle! Problem two: I don't know if this is normal or not, and it never used to bother me but its beginning to now. If you creep past the magic 4000 rpm barrier then the second turbo doesn't come on-line. If you floor it before the 4k mark then its fine. This in itself doesn't bother me too much, the problem comes when you drop a gear and the revs in the new gear happen to be above 4k. When this happens, because I haven't floored it past the 4k barrer then the second turbo doesn't come on-line, or if it does it seems to take forever (i.e. 2 or 3 seconds) to realise that it should be getting off its lazy arse and actually produce some boost. Any help and advice, pointing or laughing etc. will be greatly appreciated as usual Cheers Graham Quote Link to comment Share on other sites More sharing options...
Guest Terry S Posted August 7, 2002 Share Posted August 7, 2002 It sounds like it could be VSV related. I am sure CW can shed some light, if not call Leon. Quote Link to comment Share on other sites More sharing options...
matt Posted August 7, 2002 Share Posted August 7, 2002 Have you checked for error codes? Quote Link to comment Share on other sites More sharing options...
Digsy Posted August 7, 2002 Share Posted August 7, 2002 Originally posted by Graham Rudd Problem one: This generally only happens in second/third gear, if I floor it then ease off, even *slightly*, I will get a crazy amount of engine breaking, then if I even think about changing the amount of gas I'm giving it I will get a HUGE surge in acceleration. It can happen two or three times rapidly, and its extremely violent. Imagine it as throwing a parachute out the back, then hitting the button for the booster rocket, which is obviously hidden in the back somewhere. Whatever is happening, it certainly makes a mockery out of trying to modulate the throttle! This sounds a little bit like the throttle valve getting confused and snapping fully shut, then fully open. Don't TT's have electronic throttles? Maybe a dodgy throttle pedal sensor? Quote Link to comment Share on other sites More sharing options...
Graham Rudd Posted August 8, 2002 Author Share Posted August 8, 2002 On the journey into work this morning there seemed to be a few added complications that are probably related to the problem. I noticed that the second turbo doesn't really want to come on line at all now. It seems to just flutter instead, i.e. start making boost, lose boost, start making boost, lose boost, etc. etc. Then, just I thought it had given up, it comes on strong and boosts immediately to 1.6bar *cringe* Any ideas? I'll be booking the car in to TDI for a service and check up soon, but they have a long waiting time and it would be nice to be able drive it until then. Plus I just know it'll all magically work as Toyota intended when I actually get it there, damned thing does it to me every time! Cheers, Graham Quote Link to comment Share on other sites More sharing options...
Guest Terry S Posted August 8, 2002 Share Posted August 8, 2002 Originally posted by Graham Rudd Any ideas? I'll be booking the car in to TDI for a service and check up soon, but they have a long waiting time and it would be nice to be able drive it until then. Plus I just know it'll all magically work as Toyota intended when I actually get it there, damned thing does it to me every time! Cheers, Graham Each to ther own I guess:eek: I still think it's VSV related & I still think you should book it in got Leon to look at. Good luck. Quote Link to comment Share on other sites More sharing options...
Branners Posted August 8, 2002 Share Posted August 8, 2002 ahh, found it. Anyway, I would recommend using somebody cheaper for servicing such as Leon, Chris Wilson or Justin at torqueic. Not sure what rate CW charges but I think Leon and Justin are about £30 an hour which makes them a bargain compared against Toyota and other more expensive places. JB Quote Link to comment Share on other sites More sharing options...
Ian C Posted August 8, 2002 Share Posted August 8, 2002 The throttle isn't electronic on a UK or J spec. Both have exactly the same throttle cam arrangement. Looking at the behaviour: A huge boost spike to 1.6bar would probably be the wastegate not opening. An inability to build boost quickly would be a wastegate stuck open, or a boost leak somewhere. The engine dying a death when the throttle is eased up on could also be an air hose leak. The second turbo fluttering would indicate a control valve having trouble opening. So, I would say the wastegate isn't sticking open. The problem seem to be around the wastegate/IACV/EGCV area, all of which IIRC feed off the pressure tank - hmmm. Worth checking out all the plumbing around those areas. -Ian Quote Link to comment Share on other sites More sharing options...
Graham Rudd Posted August 8, 2002 Author Share Posted August 8, 2002 Thanks Ian, It turns out it is the plumbing, I have a hose which has perished and snapped. To make matters worse its happened THREE times before and STILL it didn't click what it might be. I think I'll pay one of my work mates to give me a good kicking, whilst chanting the mantra check the f*cking hoses you knob! Unfortunately the last three times have used up any slack I had in it, so it looks like I have to find some replacements (which might be a good idea anyway). Any recommendations? On a different note, I don't really feels its appropriate to comment on someones choice of tuner/garage services in a technical forum post where I was merely asking for possible solutions to my problem. I've used TDI since I bought the Soop a few years back and I've always received a good, professional level of service. I'll continue to use them until they provide otherwise! I'm not trying to sing the praises of any one company here. I can also highly recommend CW. I just think this kind of discussion adds a certain undertone of backstabbing, old feuds and petty bickering that is probably best forgotten. Thanks, Graham Quote Link to comment Share on other sites More sharing options...
Digsy Posted August 8, 2002 Share Posted August 8, 2002 Originally posted by Ian C The throttle isn't electronic on a UK or J spec. Both have exactly the same throttle cam arrangement. Hmmm. Could have sworn I read that somewhere.... Oh well! At least the problem's identified now Quote Link to comment Share on other sites More sharing options...
Branners Posted August 8, 2002 Share Posted August 8, 2002 Fair enough, if you had said you are a devoted TDI fan then we wouldnt have said anything. If you are happy paying £60 an hour or whatever it is now then fine, none of us said TDI are bad, we are just saying there are cheaper ways of getting a Supra serviced. Even TDI would say they work at the top end of the market. JB Quote Link to comment Share on other sites More sharing options...
Ian C Posted August 8, 2002 Share Posted August 8, 2002 Originally posted by Graham Rudd Thanks Ian, It turns out it is the plumbing, I have a hose which has perished and snapped. To make matters worse its happened THREE times before and STILL it didn't click what it might be. I think I'll pay one of my work mates to give me a good kicking, whilst chanting the mantra check the f*cking hoses you knob! Heh Which toob is it, so we know for the next time the same symptoms occur with someone's car? Or if, apparently, we have to tell you again? -Ian Quote Link to comment Share on other sites More sharing options...
Graham Rudd Posted August 9, 2002 Author Share Posted August 9, 2002 It was one of the lines plumbed into the boost controller, must have been causing no end of confusion for the poor thing Quote Link to comment Share on other sites More sharing options...
Adam Kindness Posted September 18, 2002 Share Posted September 18, 2002 do you think this maybe the prob with mine? 2nd turbo isnt comming on line at all!!! (Replacement turbos just fitted) Which hose, where..... im crap with all the 3letter phrase things!!! what does VSV stand for anyway? Quote Link to comment Share on other sites More sharing options...
Guest Martin F Posted September 19, 2002 Share Posted September 19, 2002 Vacuum Switching Valve Quote Link to comment Share on other sites More sharing options...
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