Author Topic: Vagcom results - Limp mode occurring  (Read 2307 times)

Offline Oblivion204

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Vagcom results - Limp mode occurring
« on: 22 October 2015, 19:40 »
Mk4 Gt TDI PD150 03 plate, 130k miles

Major issues over the past month but I'm getting there slowly fixing each issue

From a cold start driving off, I change to 2nd gear and with full open throttle the revs creep up to where the turbo should kick in but then something starves her of performance and I enter limp mode. If I turn her off, then on all appears ok. However even then the turbo when it does kick in feels a little strange. Strange in the fact that I can only describe as like driving a bumber car at a fairground. It could be in my head but occasionally it feels like when I release the peddle the car slows somewhat. The breaks are fine by the way. Before you read the below I need to explain that my turbo really does kick in well when the engine is warm and the performance I am achieving is tremendous (chipped to 198bhp)

To note, the car has no EGR valve as a previous owner removed it. Its now a straight pipe into the intercooler.

Parts fitted in the last month.

1) Air filter
2) MAF sensor
3) MAP sensor
4) Fuel filter
5) Temp sensor
6) Intercooler pipe
7) Water pump
8) Fuel pump in tank
9) Camshaft
10) Camshaft/Crankshaft seal
11) Oil change & filter
12) New hydraulic tappets
13) N75 Valve
14) Flushed fuel lines
15) Cam belt kit
16) Valve cover gasket
17) BOSH Battery

VAGCOM arrived today. I checked for faults, found 3, cleared them and started again but I drove her for a good ten minutes whilst running the test to be sure.

Results

Chassis Type: 1J - VW G/J/B Mk4
Scan: 01,02,03,08,15,17,19,22,35,46,56
 
Address 01     -------------------------------------------------------
   Controller: 038 906 019 HH
   Component: 1,9l R4 EDC 0000SG  1578
   Coding: 00002
   Shop #: WSC 01271
   WVWZZZ1JZ3W516109     VWZ6Z0B0388921
2 Faults Found:
17964 - Charge Pressure Control: Negative Deviation
            P1556 - 35-00 - -
16686 - Cylinder 2 Misfire Detected
            P0302 - 35-00 - -
Readiness: N/A

Address 08     -------------------------------------------------------
   Controller: 3B1 907 044 C 
   Component: CLIMATRONIC     C 2.0.0
   Coding: 11000
   Shop #: WSC 01271
1 Fault Found:
01274 - Air Flow Flap Positioning Motor (V71)
            37-00 - Faulty

Skipping Address 15-Airbags

Address 17     -------------------------------------------------------
   Controller: 1J0 920 926 C 
   Component: KOMBI+WEGFAHRS. RB8 V28
   Coding: 07424
   Shop #: WSC 00525
   WVWZZZ1JZ3W516109     VWZ6Z0B0388921
No fault code found.

Address 19     -------------------------------------------------------
   Controller: 6N0 909 901   
   Component: Gateway K<->CAN    0001
   Coding: 00006
   Shop #: WSC 01271
No fault code found.

Address 46     -------------------------------------------------------
   Controller: 1C0 959 799 B 
   Component: 1Y Komfortgerát HLO 0003
   Coding: 00064
   Shop #: WSC 00229
No fault code found.

Address 56     -------------------------------------------------------
   Controller: 1J0 035 186 E 
   Component:  Radio BNO         0007
   Coding: 00001
   Shop #: WSC 01059
No fault code found.

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

Now I know that a week ago the car had trouble starting in the mornings. I located a clip that a local stealers had left on the fuel line in the wrong position. Ever since I moved it the car has got better at starting and starts first time now. I have no warning lights appear anywhere and never have.

Having looked at Cylinder 2 misfire online most people suggest a wiring loom in the rocker cover but I had this replaced about 6 months ago so that can be ruled out.

The only thing I can think of now is either Sticky VNT veins or a stuck actuator. Does anyone else agree on this. I intend to empty an entire can of WD40 on it tomorrow and exercise the rod (just need to find it) I would like to think its just the actuator as like above when the car does pull she really does go !!

As for the air flow flap, I don't appear to have any issues when asking for heat etc so I'm not fussed about that.

Before I cleared existing faults one fault was displaying as Charge Pressure Control - Negative Deviation. But this has not come back since clearing so I guess its an old fault.

Any recommendations please. Limp mode only occurs from first start.
one quote to rebuild turbo at £500 without any further issues
waiting for another quote tomorrow but would rather attempt things before I splash the cash (again)

Offline Oblivion204

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Re: Vagcom results - Limp mode occurring
« Reply #1 on: 22 October 2015, 19:46 »
Just realised that the charge pressure control fault is still there lol  :grin:

Offline Oblivion204

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Re: Vagcom results - Limp mode occurring
« Reply #2 on: 23 October 2015, 14:45 »
Update:

Had the car on the ramp this morning. Sprayed lots of wd40 onto the actuator and excercised it by hand. At first I could hear and feel crackling as though something was present preventing the rod from moving correctly. This stopped after ten minutes and after a few more applications of wd40 the sound went altogether. I connected a pipe to the underside and with low compression I moved the diaphragm up and down. Took her for a test drive from a coldish engine by now and she flew down the road better than ever. I will see how long it last but it's definitely made the world of difference and the wd40 only cost me £6

Offline Mr_Orange

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Re: Vagcom results - Limp mode occurring
« Reply #3 on: 23 October 2015, 19:15 »
Hopefully you nailed it down for a couple of quid. If the fix doesn't last I guess you atleast now know where to throw your moneys.


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Offline thai-wronghorse

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Re: Vagcom results - Limp mode occurring
« Reply #4 on: 10 November 2015, 09:00 »
Did you resolve the misfiring issue as well? Injector loom was my initial thought but you say you've changed that recently. Might be worth looking into injector seals.

Offline Bandit127

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Re: Vagcom results - Limp mode occurring
« Reply #5 on: 10 November 2015, 16:56 »
VCDS has a reset routine for the flaps that will very likely clear this one. Well done on the rest.

Quote
Address 08     -------------------------------------------------------
   Controller: 3B1 907 044 C
   Component: CLIMATRONIC     C 2.0.0
   Coding: 11000
   Shop #: WSC 01271
1 Fault Found:
01274 - Air Flow Flap Positioning Motor (V71)
            37-00 - Faulty