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b5 S4 boost issue WITH LOGS

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Old 12-26-2012, 05:44 PM
TurboFick's Avatar
1st Gear
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Join Date: Nov 2012
Posts: 4
Default b5 S4 boost issue WITH LOGS

Hello everyone i have a weird boost issure that i need help with. When i bought the car it was already chipped and had an exhaust, the only thing i have done is the downpipes. I have smoke tested it numerous times and cant find any leaks. It does have codes for EGT sensors but i wasnt sure if they would cause boost issues like this. I contacted APR, who its chipped by, and they said i should be boosting to about 15psi and all i am seeing is 10-11psi. Any help would be greatly appreciated! It was logged in 3rd gear from 2000rpm to red line at WOT. Here are the logs: First row of numbers is RPM, second row of numbers is requested boost and the last row of number is actual boost.


RPM REQUESTED BOOST ACTUAL BOOST
/min mbar mbar
2040 1140 960
2120 1110 1010
2200 930 1070
2280 1140 1060
2360 1800 1060
2480 1650 1150
2600 1630 1270
2760 1640 1400
2880 1670 1510
3120 1680 1610
3240 1650 1610
3400 1620 1580
3560 1590 1550
3680 1560 1510
3840 1550 1480
3960 1610 1470
4080 1600 1480
4200 1600 1500
4320 1610 1530
4480 1600 1500
4600 1600 1490
4760 1590 1490
4880 1600 1500
4960 1600 1490
5120 1580 1490
5240 1560 1460
5360 1550 1460
5480 1540 1440
5560 1530 1430
5680 1500 1420
5840 1490 1400
5960 1480 1390
6080 1480 1380
6160 1480 1360
6280 1490 1370
6400 1480 1390
6520 1480 1390
6600 1470 1380
6720 1460 1380
6800 1460 1380
6440 780 1410
 

Last edited by TurboFick; 12-26-2012 at 05:59 PM.
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