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Showing results for tags 'gearchange'.
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Hi I have a question please I wonder if someone can answer? I have a 2004/05 4.5V8 Twin Turbo, Tiptronic. When driving normally, leaving the car in normal D (Drive) the car is quick to shift gears between 2000 and 3000rpm, going up the gears as quickly as it can, often leaving me in too high a gear and being very sluggish. I've recently noticed, if I turn off the PSM button, the car shifts alot later in the revs, between 3500 and 4500 and in doing so, always sits just on the turbo and feels so much more responsive. flick the PSM back on, and the car returns back to its sluggish ways, trying to climb the gears far too early. If I drive the car in manual/tiptronic (I do the majority of the time once the car is warm) I tend to drive it changing between 3000 and 4000 rpm. The gearbox is meant to remember the way I drive and respond accordingly, however doesn't seem to be learning?? I do wonder if its the underboost (boost leak) problem I've been trying to get to the bottom of, is affecting it, by the car flipping into limp home mode and wiping the gearchange memory? I'm showing no error codes on the iPhone Rev application, however am currently unable to stick the durametric program into the car as I have switched from PC to Mac. I've had the car into the dealer and mentioned the early gearchange and they said sometimes the gearbox settings can stick and reset it for me, however it doesnt seem to make a difference. Can anyone shed any light on this? ... does the car have a different engine / gearshift map without PSM on?? Thanks Chris