What is go WOT??

 

This is a MAF coding issue. Simply pull the ECU send it back to Rene. Tell him to raise the MAF limits. He can correct the issue.

 

You have any idea what is causing my PSM/ABS light problems?

 

I really appreciate your expert input, Stephen... I'll look into it. After much thought, I too had suspected the MAP limit. If you have any further advice on what you think the limit should be, let me know. Regardless, thanks for chiming in.

BTW, for any of you who may be interested in looking at my datalogs... here you go:

http://1stephen1.com/cars/porsche/datalog/1.htm

 

RAVE... what boost are you running? What turbos?

 

I don't know.

 

What does your boost gauge say on your dash? Stock turbos? X50? etc...

 

StephenTi,
I also have the Upsolute, stock turbos, Bailey DVs and K&N. My PSM / ABS goes off on cold startup and not taking revs above 3500. After engine warmup, shut down and restart, the lights would go off. However, now the lights go off and come back on and stay on. Any ideas? Thanks.

 

All the programs that are running K24s and throw the ABS/PSM light under hard acceleration then clear without code is a program issue. This was a common is back about 2 years ago. Some companies never did find away around it. If the unit stores a code check it. It is more than likely a bad MAF. The codes that clear go over limit and the ECU trips the lights then when it sees the normal operating voltage is fine then it clears. If you call Rene and tell him under acceleration you are clipping the MAF threshold in the program he can move it up.

Rave is running our Level IV with K24s. Yes I do. The oil that kicked up in your system coated the MAF and is limited the film to do its job. the MAF needs to be replaced more than likely. It is a film and if it gets coated with oil then t is done.

 

All the runs were done at WOT... when timing is pulled, does the ECU pull tb position below 100% despite the fact that throttle is at WOT? In other words, is the physical position of the throttle pedal directly related to the tb% reading, or can the ECU alter the tb position despite throttle pedal?

Next time I datalog, I will datalog the TB. With the exception of one run, I only datalogged 4 parameters. I'll try to datalog 6 parameters next time, providing I don't lose resolution on the datastream.

 

Thanks again, Stephen...

 

No problem. Hope it helps.

 

My ign timing is posted... they look neither too aggresive or conservative from my initial impression, although I'm still fairly new to datalogging the 996T, and haven't seen a lot of other people's logs... so, if you've any feedback from my datalogs, please do share.

My fuel system is stock. The stock fuel system seems to have just enough safety margin at ~1.3BAR. To be safe, I'd still like to raise the fuel pressure a little. I don't believe the stock fpr is adjustable... what are most people doing to raise their fuel pressure?

 

Sorry about my limited knowledge on the subject. My questions may be quite naive.

Is this a problem of Upsolute? It seems to happen to several Upsolute cars.

Does Upsolute continue to update their program so the future customers would not have this problem?

 

Ruiner:
The thing is when you look at that spot, the AF ratio is actually pretty rich at Lambda = .78 Which is why I really wasn't as concerned with the pulling of timing, and perhaps that it was still learning in those mapping regions in order for the ECU to slowly add to the baseline timing. Again, this is speculative, but the rich AF doesn't corresponde with why timing would be pulled in that quadrant. I will keep an eye out for the specific timing map to see if things change as time goes by.

Again, that's why if more people have datalogs to share, it'd be a lot easier to compare and get an overall idea of how all our cars are like to run.

Ypshan:
I am R&D'n an Upsolute Stage II chip (along with Bill/Kevin) to mate with Kevin's ported/polished Stage II turbos. Their regular Stage I chip for the stock turbos was flawless for me for 9k miles for street and track. I couldn't have been happier with the results. This new chip at 1.1BAR with upgraded turbos is performing fine as well... I'm simply trying to push the programming to ~1.3.

That's the difference between R&D'n your own stuff vs. buying turn-key. A few of us are trying things that are relative new, hence all this research. Whereas, if you're so inclined, there's plenty of experts such as Stephen of IA that can build you a monster right out of the box.