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Sorry for the delayed reply... The lambda is good, because the lambda read follows nice the requested lambda, and with a very acceptable correction (099) less 5%. But your boost is much lower than the requested boost. The N75 is (for some reason??) limited on 84,3%, to get the target/requested boos...

No it's not in limp mode, it looks like a leak. But make another log from 118. And to look for lambda, make a log from 099 and 31. Regards, Jeroen Hi, Here are the logs : Sunday 2 September 2007 21:36:34 8N0 906 018 BH 1.8L R4/5VT G 0001 Group A: '118 Engine Speed Intake Temp N75 Duty Cycle Press @...

RSjd wrote:No it's not in limp mode, it looks like a leak. But make another log from 118.
And to look for lambda, make a log from 099 and 31.

Regards,
Jeroen

Thanks ! I will log these groups and post them asap !

If the ecu is requesting full boost the car is not in limp mode so a boost leak maybe? I didn't know that, thx for this info, ECU requests 2500 mbar between 3000 rpm and 4000 rpm : Wednesday 15 August 2007 20:45:12 8N0 906 018 BH 1.8L R4/5VT G 0001 Group A: '115 Group B: Engine Speed Load Cmd Press...

BlackS3 wrote:Shouldn't the MAF values usually be 230-250 g/s. Don't quote me as I'm sure this figure is different for different models but a fault I had with MAF was spurious readings from it.

The maf has been changed, no improvements, or slightly...

Looking at your other post your maf readings are suggesting 225 - 243 bhp, I suspect you should expect more than that. I think a lambda fault will show if you scan the engine module for fault codes. I'm more inclined to suspect the maf as I think on the S3 the boost is controlled by the maf reading...

Hello, I have some serious boost & performance issues on my car (S3 8L -> http://www.rs246.com/index.php?name=PNphpBB2&file=viewtopic&t=63721) and after checked & replaced almost everything, i would to check the lambda sensors, I have VAG COM but do not know how to do ? Could someone help please ? m...

I checked it yes, values between 180-195 g/s, is it normal ones ? Could the maf can create such problems ?

Hello, I would to expose a problem which i experience with my S3 as i am becoming desperated. The car : 2002 225 S3, ABT remap, stainless steel catback exhaust, silicone induction hose, cotton panel air filter in standard airbox, which was running very fine until the following pb occured: When I log...