ABS/PSM light - AGAIN !!!

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Story is this.
In oktober 2006 i tuned my car with Sportec ECU and RUF exhaust.
Car was running fine 4000 km with 1,1 bar at peak.
Then at full trottle the ABS/PSM light went on with foultcodes 5525 DME torque error. They checked everything. Airsystem for leaks, sensors , changed MAF sensor 3 times etc.
Car was OK again when they changed the motronic box. This cost me 1600euro.
I have to say this is a tiptronic car with 40 000km.

Everything was then ok again for 4000 km. After a trip with hard driving in Germany lately i see 1,2 bar on full trottle. Spesially in 4. and 5. gear from 3-5000 rpm.
Today, at full trottle, my ABS/PSM light went on again. This happened twice.
Stopp and start lights are gone.
I checked with my Durametric. Foultcodes are MAF sensor and 5525 DME.
Only change is that i did a swap yesterday from my everyday 19" Techart wheels to my 18" OEM wheel with Michelin cup semislic tires i will use on track on monday.
After that i will have the verdict. I more problems i will sell the car.

I assume that my ECU box is gone again? Or is 1,2 bar to much.

Anyone have ideas what it can be?

 

sounds like an air leak
check the boost pipes from the turbos

 

do you have upgraded wg springs?

 

I know Sportec has the dual MAF setup for their higher powered 996TT engine upgrades. Do you have a dual MAF setup? Are you using the stock air box or that sweet Sportec unit?

 

It is possible your programming/set-up are near the limit...and you are getting TB shutdown or just going into limp because of fuel issues. Can you flash another ECU program (like stock)?

 

Stateman, i think you maybe have right. I shall not se 1,2 bar. The only modification i have is Ruf exhaust.
1,2 bar is to much on this tiptronic car. My dealer told me today that maybe he could do some adjustment on the wastegate.
I cannot understand why this has changed from 1,1 bar at peak to stady 1,2 bar. It's the same program!!
Engine runs fine alle the time.
Today i was on the track. Car was ok for the first 10-15 laps.
Later, when it was hotter, the ABS/PSM light started to flash again.
I then checked codes. It was MAF sensor and 5525 DME... and another unknows code. After clearing i went home. I then pushed the car to it's limit but i couldn't trig ABS/PSM then.

Can this also be overheating of brakes? 2 years ago i was joining Porsche world roadshow. When i was driving 996tt S this happened (ABS/PSM light came on). They changed the pads and fluid then it was ok. This can happen on 996tt the intructors told me.

Anyway, i think i need a more moderate ECU program now. I'm a litte bit worried for the tiptronic gearbox. Car runs like hell.

My Porsche dealer has a 997 C2S he wants to sell me. But i just want to have my car OK.

See the Performancebox data measured today. This is not extreme figures but maybe to extreme for a tip with only mod. ECU.

Time 11:54 Date 18/06/2007

Accel results
Speed(kmh) Time(s)
0-60 02.4
0-100 04.3

Accel Distance results
Distance(m) Time(s) @Speed(kmh)
0-400 12.2 195.7
0-200 08.1 155.9
0-400 12.2 195.7
0-1000 30.1 83.0

Braking results
Speed(kmh) Time(s) Distance(m)
100-0 73.0 1216.7
100-0 73.0 1216.7

User range
Speed(kmh) Time(s)
0-100 04.3
0-200 12.7
100-200 8.4
0-100-0 95.8

Misc
Vmax 204.3kmh
Vavg 81.7kmh
AvgLatG 0.0G
PkLatG 0.5G
PkAccelG 0.9G
PkDecelG 0.8G

 

I don't think so. In okt 2006 when i was tuning this, my Sportec dealer told me he had to make adjustments on WG. But i don't know what he did.
They will call Sportec tomorrow and have some advice.

 

Loosen the WG springs 1 - 1 1/2 turns. This will reduce your boost ~ 0.1 bar.