996TT boost and traction control problems
Discussion
After 3 years I have finally had a new map loaded in otherwise standard 996 TT. Excellent fun 0.9 boost now available most of the time with less lag.
However every so often when enjoying it fully! It flashes traction control and abs warning and asks me to return to dealer. Car runs fine and warnings go if you re start it.
Could any one who has done this before tell me why it happens and how to stop it, apart from driving slower! Many thanks Matthew
However every so often when enjoying it fully! It flashes traction control and abs warning and asks me to return to dealer. Car runs fine and warnings go if you re start it.
Could any one who has done this before tell me why it happens and how to stop it, apart from driving slower! Many thanks Matthew
Days of maps just holding ignition and fuel curves have long since past. I've decided to build my own EPROM flash tool as a bit if fun. I might even write an emulator if I can be bothered. But, back to your point, ask the flash company to show you what they changed on the map. It wouldnt surprise me if there is code that invokes TC under certain MAP/MAF limits.
Funny thing is
on mine it only does it when I first start the car, then if I cycle the ignition it is fine
it has done it once under hard braking on the Autobahn but not once on the track.
I am will be interested to hear the result of the OP's investigation and I will do likewise for mine
Nevyn
on mine it only does it when I first start the car, then if I cycle the ignition it is fine
it has done it once under hard braking on the Autobahn but not once on the track.
I am will be interested to hear the result of the OP's investigation and I will do likewise for mine
Nevyn
Hello
The Abs/Psm system needs the engine management system to give it signals from the engine so it knows how much throttle you are requesting and load....ect. So it has a link to from the engine ecu to the Abs ecu. once the air mass sensor breaks down and stops communicating the engine ecu stops transmitting data to the Abs module and hence the Abs/Psm light comes on.
It will be a case of a faulty air-mass sensor and the codes will read something like this "Torque transfer from DME disturbed at times" it may be that it is now getting alot more air through and just can't cope with it, not too uncommon so just replace and clear codes in psm and engine module then enjoy the car.
Mike
The Abs/Psm system needs the engine management system to give it signals from the engine so it knows how much throttle you are requesting and load....ect. So it has a link to from the engine ecu to the Abs ecu. once the air mass sensor breaks down and stops communicating the engine ecu stops transmitting data to the Abs module and hence the Abs/Psm light comes on.
It will be a case of a faulty air-mass sensor and the codes will read something like this "Torque transfer from DME disturbed at times" it may be that it is now getting alot more air through and just can't cope with it, not too uncommon so just replace and clear codes in psm and engine module then enjoy the car.
Mike
Thank you all
I will try the MAF sensor and speak again to the company who flashed it. It would be a shame to have to put it back to standard as it is excellent with 35% more boost. I had been a little sceptical when they offered me 60bhp extra, but driving it the mid range is increased proportionally more. The sensors have only gone off when I have probably induced wheel spin/slip in third gear.
Best Wishes
I will try the MAF sensor and speak again to the company who flashed it. It would be a shame to have to put it back to standard as it is excellent with 35% more boost. I had been a little sceptical when they offered me 60bhp extra, but driving it the mid range is increased proportionally more. The sensors have only gone off when I have probably induced wheel spin/slip in third gear.
Best Wishes
Hello Thanks for your help
Story has now developed, Car still fine pootling about but seems to be getting faster when gunned! I have now seen 1.1 bar boost(4th gearwide, 200rpm wide open throtle up to 5000rpm) However now the abs and PSM lights come on as soon as boost gets high.
Do I have a sticking waste gate? How much boost will standard 996tt take before it melts a piston?
I am now driving it gently until sorted! A shame though it is excellent fun with 30 to 40% mor boost!
Thanks again for the advice
Matthew
Story has now developed, Car still fine pootling about but seems to be getting faster when gunned! I have now seen 1.1 bar boost(4th gearwide, 200rpm wide open throtle up to 5000rpm) However now the abs and PSM lights come on as soon as boost gets high.
Do I have a sticking waste gate? How much boost will standard 996tt take before it melts a piston?
I am now driving it gently until sorted! A shame though it is excellent fun with 30 to 40% mor boost!
Thanks again for the advice
Matthew
matoakley said:
Hello Thanks for your helpStory has now developed, Car still fine pootling about but seems to be getting faster when gunned! I have now seen 1.1 bar boost(4th gearwide, 200rpm wide open throtle up to 5000rpm) However now the abs and PSM lights come on as soon as boost gets high.Do I have a sticking waste gate? How much boost will standard 996tt take before it melts a piston?I am now driving it gently until sorted! A shame though it is excellent fun with 30 to 40% mor boost!Thanks again for the adviceMatthew
Did you get the codes read or try flashing the car back to standard as suggested above? There could be any number of reasons for irregular boost and reading the fault codes should point you in the right direction. Whose software are you using? Btw, I regularly hit 1.2Bar, great fun isn't it !!matoakley said:
Yes Great fun as long as it dosent go bang. I havent had chance to sort yet. Its going in a week on thursday. THe map was loaded by my independant specialist. I was told it was from reputable german company
Thanks for sharing. I was considering indy but think I will go with Matt/FS now.Gassing Station | Porsche General | Top of Page | What's New | My Stuff