Hi just recently scanned my car and wondering what these faults below are and what may have caused them. Many thanks 17963 - Charge Pressure: Maximum Limit Exceeded p1555 - 35-10 Intermittent 16487 - Mass Air Flow Sensor (G70) Signal To High p0103 - 35-10 Intermittent 18010 - Power Supply Terminal 30: Voltage too low p1602 - 35-10 Intermittent Think the Terminal 30 is because I've just fit a new battery as old one was dead. Thanks a lot

Suggests the MAF is faulty... 17963 could be the result of 16487... 17963 is an over boost code... I would be looking to sort the MAF issue out first though... maybe log blocks 003, 115, 118... <tuffty/>

[TABLE="width: 489"] [TR] [TD]GROUP A - 003[/TD] [TD][/TD] [TD][/TD] [TD][/TD] [TD][/TD] [/TR] [TR] [TD]RPM[/TD] [TD]MASS FLOW[/TD] [TD]LOAD %[/TD] [TD]IGN[/TD] [TD]TIMING[/TD] [/TR] [TR] [TD="align: right"]2160[/TD] [TD="align: right"]36.53[/TD] [TD="align: right"]91.4[/TD] [TD="align: right"]22.5[/TD] [TD="align: right"]68.85[/TD] [/TR] [TR] [TD="align: right"]2520[/TD] [TD="align: right"]57.36[/TD] [TD="align: right"]97.3[/TD] [TD="align: right"]18.8[/TD] [TD="align: right"]69.85[/TD] [/TR] [TR] [TD="align: right"]3040[/TD] [TD="align: right"]68.89[/TD] [TD="align: right"]100[/TD] [TD="align: right"]21.8[/TD] [TD="align: right"]70.96[/TD] [/TR] [TR] [TD="align: right"]3440[/TD] [TD="align: right"]78.86[/TD] [TD="align: right"]100[/TD] [TD="align: right"]23.3[/TD] [TD="align: right"]72.06[/TD] [/TR] [TR] [TD="align: right"]3840[/TD] [TD="align: right"]87.01[/TD] [TD="align: right"]100[/TD] [TD="align: right"]24.8[/TD] [TD="align: right"]73.16[/TD] [/TR] [TR] [TD="align: right"]4240[/TD] [TD="align: right"]102.19[/TD] [TD="align: right"]99.6[/TD] [TD="align: right"]22.5[/TD] [TD="align: right"]74.26[/TD] [/TR] [TR] [TD="align: right"]4680[/TD] [TD="align: right"]115.97[/TD] [TD="align: right"]100[/TD] [TD="align: right"]21[/TD] [TD="align: right"]75.26[/TD] [/TR] [TR] [TD="align: right"]5080[/TD] [TD="align: right"]125.58[/TD] [TD="align: right"]100[/TD] [TD="align: right"]22.5[/TD] [TD="align: right"]76.36[/TD] [/TR] [TR] [TD="align: right"]5440[/TD] [TD="align: right"]133.86[/TD] [TD="align: right"]100[/TD] [TD="align: right"]21.8[/TD] [TD="align: right"]77.36[/TD] [/TR] [TR] [TD="align: right"]5760[/TD] [TD="align: right"]143.17[/TD] [TD="align: right"]100[/TD] [TD="align: right"]22.5[/TD] [TD="align: right"]78.26[/TD] [/TR] [TR] [TD="align: right"]6200[/TD] [TD="align: right"]147.69[/TD] [TD="align: right"]100[/TD] [TD="align: right"]23.3[/TD] [TD="align: right"]79.26[/TD] [/TR] [/TABLE]

[TABLE="width: 425"] [TR] [TD]GROUP B - 115[/TD] [TD][/TD] [TD][/TD] [TD][/TD] [/TR] [TR] [TD]RPM[/TD] [TD]LOAD[/TD] [TD]ABSOLUTE PRES[/TD] [TD]ABSOLUTE PRESS[/TD] [/TR] [TR] [TD="align: right"]2080[/TD] [TD="align: right"]11.3[/TD] [TD="align: right"]1010[/TD] [TD="align: right"]69.25[/TD] [/TR] [TR] [TD="align: right"]2240[/TD] [TD="align: right"]90.2[/TD] [TD="align: right"]1800[/TD] [TD="align: right"]70.26[/TD] [/TR] [TR] [TD="align: right"]2680[/TD] [TD="align: right"]119.5[/TD] [TD="align: right"]1780[/TD] [TD="align: right"]71.36[/TD] [/TR] [TR] [TD="align: right"]3120[/TD] [TD="align: right"]118.8[/TD] [TD="align: right"]1750[/TD] [TD="align: right"]72.46[/TD] [/TR] [TR] [TD="align: right"]3560[/TD] [TD="align: right"]118[/TD] [TD="align: right"]1730[/TD] [TD="align: right"]73.46[/TD] [/TR] [TR] [TD="align: right"]4000[/TD] [TD="align: right"]120.3[/TD] [TD="align: right"]1730[/TD] [TD="align: right"]74.56[/TD] [/TR] [TR] [TD="align: right"]4400[/TD] [TD="align: right"]126.3[/TD] [TD="align: right"]1730[/TD] [TD="align: right"]75.66[/TD] [/TR] [TR] [TD="align: right"]4800[/TD] [TD="align: right"]127.1[/TD] [TD="align: right"]1730[/TD] [TD="align: right"]76.66[/TD] [/TR] [TR] [TD="align: right"]5200[/TD] [TD="align: right"]127.8[/TD] [TD="align: right"]1750[/TD] [TD="align: right"]77.66[/TD] [/TR] [TR] [TD="align: right"]5560[/TD] [TD="align: right"]128.6[/TD] [TD="align: right"]1760[/TD] [TD="align: right"]78.56[/TD] [/TR] [TR] [TD="align: right"]5920[/TD] [TD="align: right"]126.3[/TD] [TD="align: right"]1720[/TD] [TD="align: right"]79.65[/TD] [/TR] [/TABLE]

[TABLE="width: 425"] [TR] [TD]GROUP C - 118[/TD] [TD][/TD] [TD][/TD] [TD][/TD] [/TR] [TR] [TD]RPM[/TD] [TD]TEMPERATURE[/TD] [TD]LOAD[/TD] [TD]ABSOLUTE PRES[/TD] [/TR] [TR] [TD="align: right"]2080[/TD] [TD="align: right"]22[/TD] [TD="align: right"]0[/TD] [TD="align: right"]1060[/TD] [/TR] [TR] [TD="align: right"]2360[/TD] [TD="align: right"]19[/TD] [TD="align: right"]84.3[/TD] [TD="align: right"]1280[/TD] [/TR] [TR] [TD="align: right"]2840[/TD] [TD="align: right"]15[/TD] [TD="align: right"]62.4[/TD] [TD="align: right"]1520[/TD] [/TR] [TR] [TD="align: right"]3280[/TD] [TD="align: right"]12[/TD] [TD="align: right"]58[/TD] [TD="align: right"]1490[/TD] [/TR] [TR] [TD="align: right"]3680[/TD] [TD="align: right"]12[/TD] [TD="align: right"]57.6[/TD] [TD="align: right"]1490[/TD] [/TR] [TR] [TD="align: right"]4120[/TD] [TD="align: right"]11[/TD] [TD="align: right"]59.2[/TD] [TD="align: right"]1500[/TD] [/TR] [TR] [TD="align: right"]4520[/TD] [TD="align: right"]11[/TD] [TD="align: right"]57.3[/TD] [TD="align: right"]1520[/TD] [/TR] [TR] [TD="align: right"]4920[/TD] [TD="align: right"]12[/TD] [TD="align: right"]59.2[/TD] [TD="align: right"]1520[/TD] [/TR] [TR] [TD="align: right"]5320[/TD] [TD="align: right"]12[/TD] [TD="align: right"]62.4[/TD] [TD="align: right"]1520[/TD] [/TR] [TR] [TD="align: right"]5640[/TD] [TD="align: right"]12[/TD] [TD="align: right"]63.1[/TD] [TD="align: right"]1540[/TD] [/TR] [TR] [TD="align: right"]6080[/TD] [TD="align: right"]13[/TD] [TD="align: right"]59.1[/TD] [TD="align: right"]1540[/TD] [/TR] [/TABLE]

Airflow is low... should be 180gs for a std car and 200gs ish for a mapped car... seem to be missing a column in block 115... looking at these logs suggests your car is not mapped <tuffty/>

[TABLE="width: 489"] [TR] [TD]GROUP B - 115[/TD] [TD][/TD] [TD][/TD] [TD][/TD] [TD][/TD] [/TR] [TR] [TD]RPM[/TD] [TD]LOAD[/TD] [TD]ABSOLUTE PRES[/TD] [TD]ABSOLUTE PRESS[/TD] [TD][/TD] [/TR] [TR] [TD="align: right"]2080[/TD] [TD="align: right"]11.3[/TD] [TD="align: right"]1010[/TD] [TD="align: right"]1060[/TD] [TD="align: right"]69.25[/TD] [/TR] [TR] [TD="align: right"]2240[/TD] [TD="align: right"]90.2[/TD] [TD="align: right"]1800[/TD] [TD="align: right"]1150[/TD] [TD="align: right"]70.26[/TD] [/TR] [TR] [TD="align: right"]2680[/TD] [TD="align: right"]119.5[/TD] [TD="align: right"]1780[/TD] [TD="align: right"]1510[/TD] [TD="align: right"]71.36[/TD] [/TR] [TR] [TD="align: right"]3120[/TD] [TD="align: right"]118.8[/TD] [TD="align: right"]1750[/TD] [TD="align: right"]1500[/TD] [TD="align: right"]72.46[/TD] [/TR] [TR] [TD="align: right"]3560[/TD] [TD="align: right"]118[/TD] [TD="align: right"]1730[/TD] [TD="align: right"]1490[/TD] [TD="align: right"]73.46[/TD] [/TR] [TR] [TD="align: right"]4000[/TD] [TD="align: right"]120.3[/TD] [TD="align: right"]1730[/TD] [TD="align: right"]1490[/TD] [TD="align: right"]74.56[/TD] [/TR] [TR] [TD="align: right"]4400[/TD] [TD="align: right"]126.3[/TD] [TD="align: right"]1730[/TD] [TD="align: right"]1510[/TD] [TD="align: right"]75.66[/TD] [/TR] [TR] [TD="align: right"]4800[/TD] [TD="align: right"]127.1[/TD] [TD="align: right"]1730[/TD] [TD="align: right"]1530[/TD] [TD="align: right"]76.66[/TD] [/TR] [TR] [TD="align: right"]5200[/TD] [TD="align: right"]127.8[/TD] [TD="align: right"]1750[/TD] [TD="align: right"]1520[/TD] [TD="align: right"]77.66[/TD] [/TR] [TR] [TD="align: right"]5560[/TD] [TD="align: right"]128.6[/TD] [TD="align: right"]1760[/TD] [TD="align: right"]1540[/TD] [TD="align: right"]78.56[/TD] [/TR] [TR] [TD="align: right"]5920[/TD] [TD="align: right"]126.3[/TD] [TD="align: right"]1720[/TD] [TD="align: right"]1540[/TD] [TD="align: right"]79.65[/TD] [/TR] [/TABLE]

Yeah... looks like the MAF to me... first boost col is specified and second is actual.. you are constantly under... if it wasn't for seeing you have duty cycle on the N75 (118) then I would say its in limp mode but I reckon its the MAF... try unplugging the MAF and see if the car feels different <tuffty/>

It seems more or less the same without me doing any actual logging just going off feel. Any help? Cheers

Logs suggest MAF is reading low... if you don't know when the MAF was last changed its worth doing tbh... the longest I have had one last is around 18 to 24 months... <tuffty/>

In fact I'd say its more responsive with it unplugged....that would like you suggest point to MAF sensor, what sort of price are they?? It's definitely not had one in last 2 years as I've had car that long, always thought its been flat compared to my friends Seat Leon Cupra 180. Thanks

Only buy a Bosch one.. that means going to a dealer, GSF or ECP... ECP have a 25% off code atm... not knowing what engine code your S3 is, APY is 70 ish quid and AMK/BAM is 85 ish quid plus refundable surcharge less 25%.. <tuffty/>

[TABLE="width: 181"] [TR] [TD]NEW BOSCH MAF FITTED GROUP A - 003[/TD] [TD][/TD] [/TR] [TR] [TD]RPM[/TD] [TD]MASS FLOW[/TD] [/TR] [TR] [TD="align: right"]2320[/TD] [TD="align: right"]58.96[/TD] [/TR] [TR] [TD="align: right"]2600[/TD] [TD="align: right"]63.83[/TD] [/TR] [TR] [TD="align: right"]2880[/TD] [TD="align: right"]70.97[/TD] [/TR] [TR] [TD="align: right"]3240[/TD] [TD="align: right"]77.08[/TD] [/TR] [TR] [TD="align: right"]3520[/TD] [TD="align: right"]83.83[/TD] [/TR] [TR] [TD="align: right"]3880[/TD] [TD="align: right"]93.39[/TD] [/TR] [TR] [TD="align: right"]4200[/TD] [TD="align: right"]104.58[/TD] [/TR] [TR] [TD="align: right"]4520[/TD] [TD="align: right"]120.44[/TD] [/TR] [TR] [TD="align: right"]4800[/TD] [TD="align: right"]128.58[/TD] [/TR] [TR] [TD="align: right"]5040[/TD] [TD="align: right"]137.89[/TD] [/TR] [TR] [TD="align: right"]5520[/TD] [TD="align: right"]147.83[/TD] [/TR] [TR] [TD="align: right"]5800[/TD] [TD="align: right"]152.5[/TD] [/TR] [TR] [TD="align: right"]6200[/TD] [TD="align: right"]158.53[/TD] [/TR] [/TABLE]

I removed the BMC CDA induction kit after last run and re-logged, laptop went flat (typical) and it hasn't saved my results but I did quickly check before it died and was showing approx 180 g/s as you said it should be. My guess is old MAF not greatest condition and induction kit definitely causing further restrictions. What is the best air intake route to go??

Errrgghhh... you have a BMC CDA??? bin that straight away... restrictive POS... As for induction... Badger 5 80mm TIP.. 80mm V3 Badger5 K04 Induction Kit-LCR/S3/TT (1.8t) With Hose Clips | eBay <tuffty/>

Did have! ;-) in the boot now! Spoken to badger regarding pipe and not much point getting one as going to be running ihi turbo soon and he said wont fit properly so will have to make something custom up. On plus side found out MAF not fully efficient and BMC's are terrible! What's a good filter to get? Cheers

Bill sells the heat shield and Jetex cone separately from the TIP... get those... I ran a Jetex cone for years on my GT3071... <tuffty/>

So what tip did you use when running the GT3071?? what are you running now?? Do you know off the top of your head how much the filters are?? need to get one ASAP really.