SKI Posted August 16, 2004 Share Posted August 16, 2004 Has anyone experienced auto kickdown concerns when overtaking or launching….? Occasionally, when I floor the accelerator, the box doesn’t shift down (even when I depress the kickdown button fully under the accelerator), so I usually end up having to abort an overtaking manoeuvre. If I floor the loud pedal but don’t hit the kick down button acceleration is more consistent and reliable. Anyone else experienced this. When the kickdown does work, the revs jump to about 4.5KRPM with full boost from T2 at around 5.5KRPM is this normal, thought T2 hit full boost at around 4.5KRPM. Is there anyway to ensure that the box always kicksdown. Cheers Link to comment Share on other sites More sharing options...
LeeT Posted August 16, 2004 Share Posted August 16, 2004 i have exactly the same thing at the moment Link to comment Share on other sites More sharing options...
SKI Posted August 16, 2004 Author Share Posted August 16, 2004 At first I thought it may be a problem related to T2 coming online late but know I'm not so sure, perhaps the two are linked. Link to comment Share on other sites More sharing options...
richardharmon Posted August 18, 2004 Share Posted August 18, 2004 If you watch the boost when this happens do you ever see it drop back to about 0.4 bar and just stick there when the second turbo should be online? If so then it could be a problem with the pipe-work that provides the air pressure that actuates the ‘intake air control valve’ and the ‘exhaust gas control valve’. I had something similar happening, caused by a hole in one of the rubber pipes. If you need a reference then try this link: Twin Turbo Description Edit: Just to add the problem only really manifested itself under kick down conditions. Link to comment Share on other sites More sharing options...
Digsy Posted August 18, 2004 Share Posted August 18, 2004 I suspect that this may be a feature of the autobox shift strategy as several people (including myself) have posted up about odd kickdown behaviour before. In AUTO mode, the box won't kickdown to a gear that would put the revs into the redline, and there seems to be a fine line between being in or out of this zone when you are about to do a rolling start or an overtaking manoeuver. I usually get let down by the auto box when I'm rolling up to a set of lights and they change to green before I come to a standstill. Usually, even if I go WOT, the car will not kick back down into first to do a decent rolling start. Annoyingly, the car seems to bog down in 2nd and Saxo boy goes screaming past and then tells all his mates up the pub how he out dragged a Supra Also, when overtaking, I reckon I get a decent kickdown about 70% of the time. 'Tis possibly my least favoruite aspect of the auto Supra. Link to comment Share on other sites More sharing options...
Lewis Posted August 18, 2004 Share Posted August 18, 2004 Yeah, but you can eat an ice cream and hold a smoke at the same time as driving. To me, that far outweighs any problems with the auto-box Link to comment Share on other sites More sharing options...
SKI Posted August 18, 2004 Author Share Posted August 18, 2004 I have to say I'm with Darren on this one, I hate the unpredictable side to the Auto box. Especially T2 not kicking in…. That’s unforgivable! Link to comment Share on other sites More sharing options...
Digsy Posted August 18, 2004 Share Posted August 18, 2004 Should probably point out that mine is an NA, so I don't get the T2 problem. Link to comment Share on other sites More sharing options...
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