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Discussion Starter #1
Had 2005 golf 2.0 TDI and was consistently getting 6.0 litre to the 100k city driving. However lost this car in an accident and I replaced it with a similar 2nd hand model with then 80000 km. Have consistently reported to the dealer that it lacked power and had very poor fuel economy Had vehicle serviced @90000km after service EPC light came on due to air intake pipe being loose. no difference in performance and econ. @ 105000km service air mass meter was replaced no difference. @ 110000km erg valve replaced - no difference 300 km later engine check came on. Fix was "remove exhaust recir cooler and valve, found cooler partially blocked cleaned an reassembled. no difference. 120000km fuel filter was replaced and they suggested that it was the problem - no difference Have noticed the following. When I accelerate hard the engine blow black smoke until I stop accelerating, you are not thrust into the your seat at all on acceleration.
 

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Discussion Starter #3
Noticed that the actuator did not return immediately when being lifted manually. So applied a little WD40 moved the actuator a number of times and it now returns immediately when lifted and released. Took the car for a drive and what a difference no black smoke on hard acceleration, performance is back, and economy. Next is to put a vcds and see if all is good now
 

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Excellent! That sounds like one of the easiest cures I've seen on these forums lol.
On a different matter, did you know that WD40 was called that because it was the makers 40th attempt to get it right? Bizzare the useless info you gather lol:)
 

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Well I still have problems and have been digging and learning how to use my VCDS.
Fault codes none but when the car is cold it will miss (ie lose power briefly) (still need to log that, Ideas on which items to log will be welcome) when it is hot it does not miss. It is only responsive when in sport mode or in manual (DSG gear box) I noticed that when I read the firmware of the ECU and Auto Trans that it is still the original firmware revision from when the car was built. Does VW update firmware (non recall) when the vehicle is next serviced or is it laziness of where I have had the vehicle serviced?

I have had no problems running the VCDS software on my Macbook Pro OS 10.6.7 with Parallels 6.011994 and XP Pro service pack3

Monday,23,May,2011,14:57:20:39590
VCDS Version: Release 10.6.4
Data version: 20110418


Address 01: Engine
Control Module Part Number: 03G 906 016 HJ
Component and/or Version: R4 2,0L EDC G000AG 7001
Software Coding: 0000078
Work Shop Code: WSC 10160
VCID: 72E1CBA0143F

Advanced Identification
Serial number: VWZ7Z0D1214584
Identification: BPG-810
Revision: 12345678
Date: 30.11.04
Manufacturer number: 1198
Test stand number: 1884
Flash Status
Programming Attempts: 1
Successful Attempts: 1
Programming Status: 00000000
Required Conditions: 00000001
Flash Tool Code: 59815 959 10160
Flash Date: 00.00.00
Software
P0101
U85B6
Misc.
Hardware number: 028 101 167 2
Car Info
Chassis Number: WVWZZZ1KZ5U015775
VCDS Info:
Labels: 03G-906-016-BKD.lbl
Readiness: No script available


Address 02: Auto Trans
Control Module Part Number: 02E 300 041 A
Component and/or Version: GSG DSG 041 0821
Software Coding: 0000020
Work Shop Code: WSC 44551
VCID: 1025A1287AF3

Advanced Identification
Serial number: 00000412010214
Identification: TFK-030
Revision: 04004010
Date: 01.12.04
Manufacturer number: 0214
Test stand number: 8504
Flash Status
Programming Attempts: 3
Successful Attempts: 3
Programming Status: 00000000
Required Conditions: 00000000
Flash Tool Code: 90108 000 02069
Flash Date: 00.00.00
Software
0003
Misc.
Hardware number: 02E 927 770 AD
Lot Number: C30
Type Lock: 0000
VCDS Info:
Labels: 02E-300-0XX.LBL
 

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23,902 Posts
It could be an injection pump or sensor issue. Try checking the injection pump IQ (see the FAQ) and looking at things like the coolant temp. On a cold negine it should show ambient, the sensor is a common problem area.

They should update the software during service but often don't. It's a separate item when doing maintenance. I never noticed if your car has had updates but my guess is probably. Most of the time these are applied to address running problems.
 

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Discussion Starter #7
Thanks for the leads you have given to me to follow up. I must add that without a VCDS it would be a lost cause. My oil temp sensor is faulty.
09:51:57
18.9C Intake Air Temperature (G72)
31.5C Oil Temperature
19.8C Coolant Temperat. Engine Output
18.0C Ambient Temperature
18.9C Intake Air Temperature
19.8C Coolant Temperature (G62)
18.9C Coolant Temperat. Cooler Output
10.0 % Coolant Fan 1 Duty Cycle

Still have to check the fuel injection pump
 

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Discussion Starter #9
No I live in Brisbane Australia and that is quite a normal temperature for 10:00am in May.
I contacted vw spares and asked for a price and part no but she told me that for my VIN I do not have an oil temp sensor. I have written to Ross Tech to let them know of my problem as I suspect that it has to do with my ECU firmware being a generic build and not updated for my build as I want to order the correct part.
 

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Discussion Starter #10
It is called an oil level sensor part No. 1J0907660C which I proved to be faulty this morning. Now to source one in the States who will ship to Australia. To change it will mean an oil change as well. Will be at least 2 weeks before it is done. Hopefully the loss of power when the engine is cold will be fixed when I replace it.
 
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