fuc.k_it_cut_it

For all who like puzzles, 01 s4 approximately 110k with 16 codes (mainly short to grounds); abs light, traction control light, air bag light and oil temp sensor indicator on. Fuse 34 blows on key ignition and it's obviously in limp mode and runs 'well' (5lbs boost). So many 15amp fuses blown and countless hours of frustration.... Please help.

VAG:

VCDS Version: Release 15.7.4 Running on Windows 10 x64
Data version: 20160216
Ross-Tech: Home

Monday,16,May,2016,09:27:12:17688

Chassis Type: 8D - Audi A4/S4/RS4 B5 (1995 > 2001)
Scan: 01 02 03 08 15 16 17 25 35 37 45 55 56 57 67 75 76 77

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Address 01: Engine Labels: 078-907-551-AZA.lbl
Part No: 8D0 907 551 M
Component: 2.7l V6/5VT G 0001
Coding: 06711
Shop #: WSC 06435
VCID: 34691398047E779EAA-515A

16 Faults Found:
16501 - Engine Coolant Temp. Sensor (G62)
P0117 - 35-10 - Signal too Low - Intermittent
17833 - EVAP Purge Valve (N80)
P1425 - 35-00 - Short to Ground
17938 - Camshaft Timing Adjustment
P1530 - 35-00 - Short to Ground
17955 - Boost Pressure Regulation Valve (N75)
P1547 - 35-00 - Short to Ground
17697 - Boost Pressure Control Valve (N249)
P1289 - 35-00 - Short to Ground
17529 - Oxygen (Lambda) Sensor Heating Circuit: B2 S2
P1121 - 35-00 - Short to Ground
17525 - Oxygen (Lambda) Sensor Heating Circuit: B1 S2
P1117 - 35-00 - Short to Ground
17861 - Exhaust Gas Temp Sensor 1 (G235)
P1453 - 35-00 - Open or Short to Plus
17865 - Exhaust Gas Temp Sensor 2 (G236)
P1457 - 35-00 - Open or Short to Plus
16486 - Mass Air Flow Sensor (G70)
P0102 - 35-00 - Signal too Low
17523 - Oxygen (Lambda) Sensor Heating: B1 S1
P1115 - 35-00 - Short to Ground
17527 - Oxygen (Lambda) Sensor Heating Circuit: B2 S1
P1119 - 35-00 - Short to Ground
16518 - Oxygen (Lambda) Sensor B1 S1
P0134 - 35-00 - No Activity
16538 - Oxygen (Lambda) Sensor B2 S1
P0154 - 35-00 - No Activity
17522 - Oxygen (Lambda) Sensor; B1 S2
P1114 - 35-00 - Internal Resistance too High
17548 - Oxygen (Lambda) Sensor; B2 S2
P1140 - 35-00 - Internal Resistance too High
Readiness: 0010 0101

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Address 35: Centr. Locks Labels: 8D0-862-257.lbl
Part No: 8L0 862 257 N
Component: CV-Pump, Alarm, RC D16
Coding: 16140
Shop #: WSC 06435
VCID: 40814F4840C6DB3E3E-4F1E

7 Faults Found:
01367 - Central Locking Pump Run Time Exceeded (Likely Leak)
35-00 - -
01374 - Alarm triggered by Terminal 15
35-00 - -
01370 - Alarm triggered by Interior Monitoring
35-00 - -
01369 - Alarm triggered by Hood Switch
35-00 - -
01368 - Alarm triggered by Luggage Compartment Switch
35-00 - -
00991 - Interior Lights
28-00 - Short to Plus
00955 - Key 1
09-00 - Adaptation Limit Surpassed

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Address 45: Inter. Monitor Labels: 4B0-951-173.lbl
Part No: 4B0 951 173
Component: Innenraumueberw. D03
Coding: 00101
Shop #: WSC 06435
VCID: 60C1AFC8E006BB3E1E-4B96

No fault code found.

End-------------------------(Elapsed Time: 04:02)--------------------------


Things replaced:

fuel filter
fuel pump relay
N75
One egt
all 4 o2's
drivers side cam position sensor
timing belt and all the stuff from the kit
coolant temp sensor *(cleared code p0117)
spark plugs
new battery

fuse 34 still blows and still is in limp mode; and both still after:

Boost leak checked and held 10lbs
disconnected boost gauge for possible short
visual check of easily accessible wiring
visual check for loose solder or burn marks on ecu circuit board
disconnected: all o2's, both cam position sensors, both cam chain tensioner solenoids, oil temp sensor, coolant temp sensor, both egt's, n75, n249, fuel pump and maf/all the sensors on the airbox


Fuse 34 does not blow when the fuel pump relay is out, but blows when 'started' (fuel still in lines) I understand that the fuel pump relay powers one of the three + to the ecu. all visible engine grounds and fuse block grounds are good.

I'm thinking possible bad ecu... two test I know of:

1.) Try a loner ecu and possibly fry it
2.) Put my ecu in another s4 and have it possibly muck up some sensors or something...
3.) any other ecu test???

Any ideas? Been in limp for years and cannot figure it out, i'd rather not unwrap and check all the wiring for the circuits related to fuse 34 but seems like I might have to if it's not the ecu... Thank you all

B5 S4 is life