Advise any one

[Scottamdaddy]

Hi guys need some advise,

the last 3 starts on my car from cold i have notice a engine wobble only once or a miss fire only once one or the other

it drives fine except boost pressure seems to be very low from feel

once the auto choke has turned off it runs fine even when the choke is on and its done its one miss fire it runs fine its just a bit annoying

its going in this weekend to audi to have all 4 coils replaced under a recall but it would seem to me if these were the issue it would do it perm

any ways i have uploaded some live data pics and a full scan in a hope one of you would spot something that not right

License Plate: 123
Mileage: 253160km-157306mi Repair Order:



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Mileage: 253160km/157306miles
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Address 01: Engine Labels: Redir Fail!
Part No: 8E0 906 018 B
Component: 1.8L R4/5VT 0004
Coding: 11501

No fault code found.
Readiness: 0110 1101

-------------------------------------------------------------------------------
Address 03: ABS Brakes Labels: 8E0-614-517.lbl
Part No: 8E0 614 517
Component: ABS/ESP front 1326
Coding: 04275

No fault code found.

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Address 08: Auto HVAC Labels: 8E0-820-043.lbl
Part No: 8E0 820 043
Component: A4 Klimaautomat 0711
Coding: 00000

1 Fault Found:
00474 - Control Module for Immobilizer
49-10 - No Communications - Intermittent

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Address 09: Cent. Elect. Labels: 8E0-907-279-8E2.lbl
Part No: 8E0 907 279
Component: int. Lastmodul RDW 0510
Coding: 00001

No fault code found.

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Address 15: Airbags Labels: 8E0-959-655-84.lbl
Part No: 8E0 959 655
Component: Airbag 8.4E 3001
Coding: 0010602

No fault code found.

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Address 16: Steering wheel Labels: 8E0-953-549.lbl
Part No: 8E0 953 549 F
Component: Lenksáulenmodul 0304
Coding: 00001

1 Fault Found:
00474 - Control Module for Immobilizer
49-10 - No Communications - Intermittent

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Address 17: Instruments Labels: 8E0-920-9xx-8E2.lbl
Part No: 8E0 920 950 G
Component: KOMBI+WEGFAHRS. RB4 D21
Coding: 00400
Shop #: WSC 00099

2 Faults Found:
01176 - Key
07-10 - Signal too Low - Intermittent
01304 - Radio
49-00 - No Communications

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Address 45: Inter. Monitor Labels: 8E0-951-177.lbl
Part No: 8E0 951 177
Component: Innenraumueberw. 0504
Coding: 00001

No fault code found.

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Address 46: Central Conv. Labels: 8E0-959-433-MIN.lbl
Part No: 8E0 959 433 AJ
Component: Komfortgerát T9F 0619
Coding: 07915

Subsystem 1 - Part No: 8E2959802B
Component: Tõrsteuer.FS BRM 4.11

Subsystem 2 - Part No: 8E2959801B
Component: Tõrsteuer.BF BRM 4.11

9 Faults Found:
01320 - Control Module for Climatronic (J255)
49-10 - No Communications - Intermittent
01134 - Alarm Horn (H12)
49-00 - No Communications
01370 - Alarm triggered by Interior Monitoring
35-00 - -
01371 - Alarm triggered by Door Contact Switch; Driver's Side
35-00 - -
01561 - Rear Left Door
59-10 - Can't Unlock - Intermittent
01561 - Rear Left Door
61-00 - Won't De-Safe
01562 - Rear Right Door
59-00 - Can't Unlock
01562 - Rear Right Door
61-00 - Won't De-Safe
01559 - Drivers Door
61-00 - Won't De-Safe

End ---------------------------------------------------------------------

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Address 01: DTCs cleared

i have cleared all these codes and will re scan tomorrow after i am back from work

the only thing i noticed was the boost pressure control valve makes no sound apon testing

Audi A4 E8 1.8T 2001 Saloon

thanks for any one who can help or tell me what else to try

 

[Darran]

Change the n75 if your boost is low it very rarely throws a dtc when its gone.

 

[Scottamdaddy]

well the misfire / judder on start up has gone so tonight i decided to do some tests on the turbo i ran a log and got the following the highest the boost goes is 25 PSI is this normal

 

[Darran]

No thats too high, once it peaks over 22psi it goes into soft limp and restricts boost to 5 psi until you change gear, it looks like either n75 or waste gate is sticking, more likely to be n75 but if you can constantly hit 25 psi then its either mapped up or you boost pressure sensor is faulty and not telling ecu its over boosting!
You should be getting overboost dtc code.

 

[Scottamdaddy]

Well when I was running the log it was saying the ecu was predicting slightly more only by 20 milabar. So if this n75 valve is shot do you think one of the symptoms would be that when I give it some and let off the revs quickly jump for a brief second from where I let off then go back down as normal

 

[Darran]

Hmmm can you post the graph?

 

[Scottamdaddy]

I diddnt do a graph I done a log but I will try and do one over the weekend and post one up mate