b6 2.7t swap. starting problems

**mattvon83** · 06-01-2017 07:09 AM

Hi. i did a 2.7 swap. did all wiring for starter as my b6 had been set with clutch relay. I cant even get starter to try when i turn the key. literally nothing not even a click. i rechecked wiring and even tried taking relay out. still nothing. i tried crossing terminals on starter and it engages and rolls over fine. does anyone have any idea as to why nothing is working? I also ran vcds on the acc/start auth. nothing comes up. cant read controller. thank you for any help you can give.

**jokh** · 06-01-2017 07:52 AM

Do you have wiring diagrams or did you follow the guide here on audizine?
I had the same problems as you when following the wiring guide from this website. Had to rewire everything accoring to the diagrams afterwards.

**blitz2190** · 06-01-2017 09:05 AM

I can tell you if you followed mine its correct, ive used it on an s4 as well as 3 different types of a4's if there was an issue its most likely because the additional connections under the chart was not followed. To the op do you have power to the supply side of the starter relay? Also side note the starter relay is not in my wiring diagram, its bypassed but can easily be added.

**mattvon83** · 06-01-2017 09:21 AM

i have both and along with the pinout for ecu. everything in the car seems to work fine just wont try and start.

**mattvon83** · 06-01-2017 09:24 AM

blitz i followed your write up on the wiring. i tried with starter relay and also after taking it out. i have power going in. i tried crossing starter with screw driver and it engages and rolls the engine over.

**Bob Marley** · 06-01-2017 09:44 AM

Not sure if you tried this already...remove the relay & try putting a jumper from 30 to 87 wires. I believe wires are Red & Red/Gray heavier gauge than the others...

see if it tries to Start. This bypasses the Clutch pedal Switch

Relay 219

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**blitz2190** · 06-01-2017 10:06 AM

This^, quick question did this chassis start as an auto or manual? Also keep in mind that there is no starter relay unless you added it to the harness from the b6 harness. So you have to run the wire from the b6 plug to the starter relay coil(switched from ground at the clutch switch) and supply a 12v on the other side of the coil. This allowes power through the relay contacts which should have 12v on one side when the key is turned to start. The other contact then goes to the starter.

**mattvon83** · 06-01-2017 10:47 AM

my b6 started as a 6 speed. the 2.7 was tip. but i removed the relay from my b6 harness and wired it exactly the same as had both side by side

**mattvon83** · 06-01-2017 11:12 AM

don't know if this has anything to do with it. when I used vcds I tried scanning the 05-acc/start auth. it is coming up with cant find controller. could this be the problem? if so can someone please help me locate that to work

**blitz2190** · 06-01-2017 11:23 AM

Well to make sure its not the relay jump the contacts like Bob Marley suggested, remove said relay and jump the starter input to the starter wire and see if it cranks

**mattvon83** · 06-01-2017 12:35 PM

im confused about the relay you are talking about. is it the relay that gets triggered from clutch switch? or is there another relay under the dash? if it is the relay that gets triggered from the clutch(white connector pin 14) I have already taken the relay out and joined the wires direct.

**blitz2190** · 06-01-2017 12:38 PM

and you have power coming from T10a BROWN Pin4 red/black on the b6 plug with the key turned to start? If not you need to trace that back and find out why, that is supplied from post 30 under the dash to the key cylinder then to the body plugs.

**mattvon83** · 06-01-2017 12:55 PM

also can it be the fact that vcds cant find the acc/start auth. controller?

**blitz2190** · 06-01-2017 12:57 PM

are the keys a match to the dash? also it doesn't matter as the 2.7 has no immo.

**mattvon83** · 06-01-2017 01:10 PM

the key is the key that worked fine before did swap

**Bob Marley** · 06-01-2017 01:15 PM

Originally Posted by mattvon83

im confused about the relay you are talking about. is it the relay that gets triggered from clutch switch? or is there another relay under the dash? if it is the relay that gets triggered from the clutch(white connector pin 14) I have already taken the relay out and joined the wires direct.

The clutch switch Provides the Ground for the Clutch Relay (Black Body Plug engine bay).

When you fully depress the Clutch pedal it completes the circuit & closes the relay contacts and Allows +12v to pass from 30 post to 87 to your starter 50 post... if you're relay is bad...jumping 30 to 87 would reveal this... if it still doesn't start...then you can start trouble shooting the +12v ignition up to that point

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**mattvon83** · 06-01-2017 01:24 PM

I have already cut the relay out completely and still nothing

**blitz2190** · 06-01-2017 01:48 PM

I'll ask one more time is there power to the wire i said above when the key is in the start position

**mattvon83** · 06-01-2017 03:03 PM

Yes I do

**blitz2190** · 06-01-2017 04:14 PM

then the issues is you wire to the starter, you have to trace it out. If you jumped the relay correctly then it should turn over as long as the connection to the starter is good.

**Bob Marley** · 06-01-2017 04:48 PM

Also confirm you're Ground Strap near the Starter along the Passenger frame rail is connected & Grounded properly

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**mattvon83** · 06-01-2017 05:15 PM

k. I have power coming thru t10a brown pin 4. I am not going to trace the wire and I am just going to run a new one. how much power is supposed to run down the line? can I run it thru a relay from post 30 in ebox with the t10a brown pin 4 triggering it?

**blitz2190** · 06-02-2017 09:43 AM

I cant remember off hand what gauge wire it is but that wire is suppose to supply enough current to trigger the solenoid without needing a relay, the interlock relay is just a safety measure so you can't start the car in gear.

**mattvon83** · 06-02-2017 10:34 AM

im only asking that and thinking of that because instead of trying to trace the problem in that wire, or even running a new wire along the side of the harness and actually having to secure it. i was going to run a wire over to the battery and put the relay there then just run the wire down from there to the starter.

**blitz2190** · 06-02-2017 10:36 AM

ah well yeah you could do that if thats the way you want to.

**mattvon83** · 07-28-2017 08:49 AM

update. i had 3 bent intake valves. i have since replaced and lapped all 30 valves just to be certain. it started when i put back together. but it will rev to 1000, then down to 500 and stall. gas pedal does nothing. sometimes will do it 2-3 times before stalling. but i cant get it to idle or gas pedal to do anything. anybody have any ideas?

**rocket1420** · 07-28-2017 08:52 AM

Originally Posted by mattvon83

update. i had 3 bent intake valves. i have since replaced and lapped all 30 valves just to be certain. it started when i put back together. but it will rev to 1000, then down to 500 and stall. gas pedal does nothing. sometimes will do it 2-3 times before stalling. but i cant get it to idle or gas pedal to do anything. anybody have any ideas?

What year ECU are you using?

**mattvon83** · 07-28-2017 10:01 AM

im using an ecu from an 01 s4

**LINDW4LL** · 07-28-2017 10:08 AM

Originally Posted by mattvon83

im using an ecu from an 01 s4

Unplug the MAF and see if it runs better. Also could be a big vacuum leak. I assume you've checked fault codes.

What do the timing values show in VCDS, block 093?

**AudiA4_20T** · 07-28-2017 10:41 AM

Glad it's fixed up, almost there

**mattvon83** · 08-01-2017 05:52 AM

hi guys. cant figure it out. found 2 vacuum leaks which i fixed. also realized ecu was still coded for auto. that is now fixed too. so i finally got the full version of VCDS. here is the autoscan.

VCDS-Lite Version: Release 1.2
Monday, 31 July 2017, 23:47:40:9917

Chassis Type: 8E - Audi A4 B6
Scan: 01,02,03,08,09,0F,11,15,16,17,18,36,37,45,46,55,56 ,57,65,67,69,75,76,77

-------------------------------------------------------------------------------
Address 01: Engine Labels: 078-907-551-AZA.LBL
Controller: 8D0 907 551 M
Component: 2.7l V6/5VT G 0002
Coding: 06711
Shop #: WSC 87119
VCID: 341BB96E1723
No fault code found.
Readiness: 0110 0100
-------------------------------------------------------------------------------
Address 03: ABS Brakes Labels: 8E0-614-517.LBL
Controller: 8E0 614 517 A
Component: ABS/ESP allrad 1726
Coding: 04495
Shop #: WSC 00000
VCID: 263F5326D1FF
2 Faults Found:
18256 - Please check DTC Memory of Engine Controller
P1848 - 35-10 - - - Intermittent
00287 - ABS Wheel Speed Sensor; Rear Right (G44)
30-00 - Open or Short to Plus
-------------------------------------------------------------------------------
Address 08: Auto HVAC Labels: 8E0-820-043.LBL
Controller: 8E0 820 043 G
Component: A4 Klimaautomat 0712
Coding: 00000
Shop #: WSC 63351
VCID: 253D542AACF9
3 Faults Found:
01592 - Air Quality Sensor (G238)
37-00 - Faulty
00819 - High Pressure Sensor (G65)
30-00 - Open or Short to Plus
01317 - Control Module in Instrument Cluster (J285)
79-00 - Please Check Fault Codes
-------------------------------------------------------------------------------
Address 09: Cent. Elect. Labels: 8E0-907-279-8E2.LBL
Controller: 8E0 907 279 E
Component: int. Lastmodul RDW 0305
Coding: 00001
Shop #: WSC 00000
VCID: 341BB96E1723
11 Faults Found:
01494 - Bulb for Parking Lamps; Left (M1)
57-00 - Electric Circuit Failure
01498 - Bulb for Parking Lamps; Right (M3)
57-00 - Electric Circuit Failure
00984 - Left Tail Light (M4)
57-00 - Electric Circuit Failure
00978 - Lamp for Low Beam; Left (M29)
57-00 - Electric Circuit Failure
00979 - Lamp for Low Beam; Right (M31)
57-00 - Electric Circuit Failure
01495 - Bulb for High-Beams; Left (M30)
57-00 - Electric Circuit Failure
01499 - Bulb for High-Beams; Right (M32)
57-00 - Electric Circuit Failure
01496 - Bulb for Fog-Lamps; Left (L22)
57-00 - Electric Circuit Failure
01500 - Bulb for Fog-Lamps; Right (L23)
57-00 - Electric Circuit Failure
01493 - Bulb for Blinkers; Front Left (M5)
57-00 - Electric Circuit Failure
01497 - Bulb for Blinkers; Front Right (M7)
57-00 - Electric Circuit Failure
-------------------------------------------------------------------------------
Address 15: Airbags Labels: 8E0-959-655-84.LBL
Controller: 8E0 959 655 A
Component: Airbag 8.4E 3000
Coding: 0010607
Shop #: WSC 63351
VCID: 351D846A1C59
4 Faults Found:
00532 - Supply Voltage B+
002 - Lower Limit Exceeded - Intermittent
00588 - Airbag Igniter; Driver Side (N95)
001 - Upper Limit Exceeded
01738 - Crash Sensor for Front Airbag; Drivers Side (G283)
011 - Open Circuit
01739 - Crash Sensor for Front Airbag; Pass. Side (G284)
011 - Open Circuit
-------------------------------------------------------------------------------
Address 16: Steering wheel Labels: 8E0-953-549.LBL
Controller: 8E0 953 549 L
Component: Lenksáulenmodul 0308
Coding: 00041
Shop #: WSC 63351
VCID: 3C0B914E3F73
No fault code found.
-------------------------------------------------------------------------------
Address 17: Instruments Labels: 8E0-920-9xx-8E2.LBL
Controller: 8E0 920 900 H
Component: KOMBI+WEGFAHRS. RB4 D25
Coding: 03300
Shop #: WSC 00779
VCID: 2925581AC0E1
WAULT68E02A137618 AUZ6Z0A0262409
4 Faults Found:
00779 - Outside Air Temp Sensor (G17)
30-00 - Open or Short to Plus
00668 - Supply Voltage Terminal 30
53-10 - Supply Voltage Too Low - Intermittent
01314 - Engine Control Module
49-10 - No Communications - Intermittent
01316 - ABS Control Module
49-10 - No Communications - Intermittent
-------------------------------------------------------------------------------
Address 45: Inter. Monitor Labels: 8E0-951-177.LBL
Controller: 8E0 951 177
Component: Innenraumueberw. 0504
Coding: 00001
Shop #: WSC 00000
VCID: EBA9E2128A9D
No fault code found.
-------------------------------------------------------------------------------
Address 46: Central Conv. Labels: 8E0-959-433-MAX.LBL
Controller: 8E0 959 433 T
Component: Komfortgerát T5B 0617
Coding: 11788
Shop #: WSC 63351
VCID: 42F7EFB65D97
26 Faults Found:
01330 - Central Control Module for Central Convenience (J393)
52-10 - Supply Voltage Too High - Intermittent
01330 - Central Control Module for Central Convenience (J393)
53-10 - Supply Voltage Too Low - Intermittent
01134 - Alarm Horn (H12)
49-10 - No Communications - Intermittent
01370 - Alarm triggered by Interior Monitoring
35-00 - -
00962 - Alarm via. Tilt Sensor
35-00 - -
01369 - Alarm triggered by Hood Switch
35-00 - -
01374 - Alarm triggered by Terminal 15
35-00 - -
01371 - Alarm triggered by Door Contact Switch; Driver's Side
35-00 - -
01572 - Alarm triggered by Door Contact Switch; Passenger Side
35-00 - -
01573 - Alarm triggered by Door Contact Switch; Left Rear
35-00 - -
01331 - Door Control Module; Driver Side (J386)
80-00 - Single-Wire Operation
00932 - Electric Window Motor; Drivers Side (V147)
35-10 - - - Intermittent
01034 - Electric Window Thermal Protection Active; Driver
27-10 - Implausible Signal - Intermittent
00912 - Window Regulator Switch; Front Left (E40)
27-10 - Implausible Signal - Intermittent
01340 - Mirror Adjustment Switch
57-10 - Electric Circuit Failure - Intermittent
01811 - Supply Voltage for Door Controller; Drivers Side (J386)
37-00 - Faulty
01332 - Door Control Module; Passenger Side (J387)
52-10 - Supply Voltage Too High - Intermittent
01561 - Left Rear Door
59-10 - Can't Unlock - Intermittent
01803 - Door Warning Lamp; Rear Left (W37)
57-10 - Electric Circuit Failure - Intermittent
00934 - Electric Window Motor; Rear Left (V26)
62-10 - No or Incorrect Adjustment - Intermittent
01333 - Door Control Module; Rear Left (J388)
52-10 - Supply Voltage Too High - Intermittent
01813 - Supply Voltage for Door Controller; Rear Left (J388)
37-10 - Faulty - Intermittent
01562 - Right Rear Door
59-10 - Can't Unlock - Intermittent
01037 - Electric Window Thermal Protection Active; Rear Right
35-10 - - - Intermittent
01334 - Door Control Module; Rear Right (J398)
52-10 - Supply Voltage Too High - Intermittent
00935 - Electric Window Motor; Rear Right (V27)
62-10 - No or Incorrect Adjustment - Intermittent
-------------------------------------------------------------------------------
Address 55: Xenon Range Labels: 4Z7-907-357.LBL
Controller: 4Z7 907 357
Component: dynamische LWR D06
Coding: 00060
Shop #: WSC 63351
VCID: 047B29AE0703
3 Faults Found:
01535 - Control Circuit for Right Headlight Range Adjusting Motor (V49)
30-00 - Open or Short to Plus
01534 - Control Circuit for Left Headlight Range Adjusting Motor (V48)
30-00 - Open or Short to Plus
00532 - Supply Voltage B+
07-10 - Signal too Low - Intermittent
End --------------------------------------------------------------------------------------------------

i dont have front clip on yet, so that is why so many errors for lights and stuff. let me know if you see anything that looks wrong.

**AudiA4_20T** · 08-01-2017 06:07 AM

It's hard to know until you clear the codes and see what comes back

**mattvon83** · 08-01-2017 06:59 AM

which codes do you want me to clear?

**AudiA4_20T** · 08-01-2017 04:36 PM

Originally Posted by mattvon83

which codes do you want me to clear?

All of them.

**mattvon83** · 08-02-2017 11:18 AM

ok i went thru and cleared codes. some came back instantly as i dont have front clip on so no lights or anything.

Chassis Type: 8E - Audi A4 B6
Scan: 01,02,03,08,09,0F,11,15,16,17,18,36,37,45,46,55,56 ,57,65,67,69,75,76,77

-------------------------------------------------------------------------------
Address 01: Engine Labels: 078-907-551-AZA.LBL
Controller: 8D0 907 551 M
Component: 2.7l V6/5VT G 0002
Coding: 06711
Shop #: WSC 87119
VCID: 341BB96E1723
No fault code found.
Readiness: 0110 0100
-------------------------------------------------------------------------------
Address 03: ABS Brakes Labels: 8E0-614-517.LBL
Controller: 8E0 614 517 A
Component: ABS/ESP allrad 1726
Coding: 04495
Shop #: WSC 00000
VCID: 263F5326D1FF
1 Fault Found:
00287 - ABS Wheel Speed Sensor; Rear Right (G44)
30-00 - Open or Short to Plus
-------------------------------------------------------------------------------
Address 08: Auto HVAC Labels: 8E0-820-043.LBL
Controller: 8E0 820 043 G
Component: A4 Klimaautomat 0712
Coding: 00000
Shop #: WSC 63351
VCID: 253D542AACF9
3 Faults Found:
01592 - Air Quality Sensor (G238)
37-00 - Faulty
00819 - High Pressure Sensor (G65)
30-00 - Open or Short to Plus
01317 - Control Module in Instrument Cluster (J285)
79-00 - Please Check Fault Codes
-------------------------------------------------------------------------------
Address 09: Cent. Elect. Labels: 8E0-907-279-8E2.LBL
Controller: 8E0 907 279 E
Component: int. Lastmodul RDW 0305
Coding: 00001
Shop #: WSC 00000
VCID: 341BB96E1723
7 Faults Found:
00979 - Lamp for Low Beam; Right (M31)
57-00 - Electric Circuit Failure
01495 - Bulb for High-Beams; Left (M30)
57-00 - Electric Circuit Failure
01499 - Bulb for High-Beams; Right (M32)
57-00 - Electric Circuit Failure
01496 - Bulb for Fog-Lamps; Left (L22)
57-00 - Electric Circuit Failure
01500 - Bulb for Fog-Lamps; Right (L23)
57-00 - Electric Circuit Failure
01493 - Bulb for Blinkers; Front Left (M5)
57-00 - Electric Circuit Failure
01497 - Bulb for Blinkers; Front Right (M7)
57-00 - Electric Circuit Failure
-------------------------------------------------------------------------------
Address 15: Airbags Labels: 8E0-959-655-84.LBL
Controller: 8E0 959 655 A
Component: Airbag 8.4E 3000
Coding: 0010607
Shop #: WSC 63351
VCID: 351D846A1C59
3 Faults Found:
00588 - Airbag Igniter; Driver Side (N95)
001 - Upper Limit Exceeded
01738 - Crash Sensor for Front Airbag; Drivers Side (G283)
011 - Open Circuit
01739 - Crash Sensor for Front Airbag; Pass. Side (G284)
011 - Open Circuit
-------------------------------------------------------------------------------
Address 16: Steering wheel Labels: 8E0-953-549.LBL
Controller: 8E0 953 549 L
Component: Lenksáulenmodul 0308
Coding: 00041
Shop #: WSC 63351
VCID: 3C0B914E3F73
No fault code found.
-------------------------------------------------------------------------------
Address 17: Instruments Labels: 8E0-920-9xx-8E2.LBL
Controller: 8E0 920 900 H
Component: KOMBI+WEGFAHRS. RB4 D25
Coding: 03300
Shop #: WSC 00779
VCID: 2925581AC0E1
WAULT68E02A137618 AUZ6Z0A0262409
1 Fault Found:
00779 - Outside Air Temp Sensor (G17)
30-00 - Open or Short to Plus
-------------------------------------------------------------------------------
Address 45: Inter. Monitor Labels: 8E0-951-177.LBL
Controller: 8E0 951 177
Component: Innenraumueberw. 0504
Coding: 00001
Shop #: WSC 00000
VCID: EBA9E2128A9D
No fault code found.
-------------------------------------------------------------------------------
Address 46: Central Conv. Labels: 8E0-959-433-MAX.LBL
Controller: 8E0 959 433 T
Component: Komfortgerát T5B 0617
Coding: 11788
Shop #: WSC 63351
VCID: 42F7EFB65D97
-------------------------------------------------------------------------------
Address 55: Xenon Range Labels: 4Z7-907-357.LBL
Controller: 4Z7 907 357
Component: dynamische LWR D06
Coding: 00060
Shop #: WSC 63351
VCID: 047B29AE0703
2 Faults Found:
01535 - Control Circuit for Right Headlight Range Adjusting Motor (V49)
30-00 - Open or Short to Plus
01534 - Control Circuit for Left Headlight Range Adjusting Motor (V48)
30-00 - Open or Short to Plus
End --------------------------------------------------------------------------------------------------

**rocket1420** · 08-02-2017 10:07 PM

Originally Posted by mattvon83

Chassis Type: 8E - Audi A4 B6

Address 08: Auto HVAC Labels: 8E0-820-043.LBL
Controller: 8E0 820 043 G
Component: A4 Klimaautomat 0712
Coding: 00000
Shop #: WSC 63351
VCID: 253D542AACF9
3 Faults Found:
01592 - Air Quality Sensor (G238)
37-00 - Faulty
00819 - High Pressure Sensor (G65)
30-00 - Open or Short to Plus
01317 - Control Module in Instrument Cluster (J285)
79-00 - Please Check Fault Codes

Address 15: Airbags Labels: 8E0-959-655-84.LBL
Controller: 8E0 959 655 A
Component: Airbag 8.4E 3000
Coding: 0010607
Shop #: WSC 63351
VCID: 351D846A1C59
3 Faults Found:
00588 - Airbag Igniter; Driver Side (N95)
001 - Upper Limit Exceeded
01738 - Crash Sensor for Front Airbag; Drivers Side (G283)
011 - Open Circuit
01739 - Crash Sensor for Front Airbag; Pass. Side (G284)
011 - Open Circuit

Address 17: Instruments Labels: 8E0-920-9xx-8E2.LBL
Controller: 8E0 920 900 H
Component: KOMBI+WEGFAHRS. RB4 D25
Coding: 03300
Shop #: WSC 00779
VCID: 2925581AC0E1
WAULT68E02A137618 AUZ6Z0A0262409
1 Fault Found:
00779 - Outside Air Temp Sensor (G17)
30-00 - Open or Short to Plus

Fault 01592 - no info on ross-tech.
00819 - High Pressure Sensor (G65) - possible bad pressure switch near the condenser. Not the problem.
01317 - Control Module in Instrument Cluster (J285) - ECU can't talk to the cluster. I assume this is normal on a 2.7 swap?

I highly doubt the airbag codes would cause this, but hopefully someone else can confirm. I would think if anything the airbag faults would prevent the car from starting at all.

Which leaves the Outside Air Temp Sensor. This is certainly a possible cause, although it's hard to tell from a keyboard. Basically the ECU gets confused as to what the air temperature should be, air:fuel ratios go crazy, and it stalls out. At least that's my guess. Have you tried with the MAF unplugged?

**mattvon83** · 08-03-2017 06:19 AM

thanks. i was actually thinking the same thing about the outside air temp last night. i dont have the front clip on the car which would be why it is not getting a signal. when i get off work tonight im going to put the front end on and hope for the best

**blitz2190** · 08-03-2017 03:51 PM

none of that will affect the engine starting including that temp sensor the only ones thats matter are the coolant temp and iat as far as temps go. Start with the basics, does it have spark (needs a test light)? does it have fuel? does it have compression, figure out which is wrong trace that system backwards, I'm going to gues something with wiring.

**heywier427** · 08-03-2017 04:36 PM

Ive been driving with the outside air temp sensor ripped off for years. Its just 2 wires hanging there (well, taped and tucked up).

Dash reads 10 deg. higher, but never any starting or running rich, or any kind of issues.

I would think the ecu has to talk to the cluster.

Any other 2.7 swaps showing that code?

**AudiA4_20T** · 08-03-2017 08:47 PM

I'm at a loss... Something legit is wrong and there's no sign of it.

Thread: b6 2.7t swap. starting problems

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