Recent Posts

11

Mk5 General Area / Re: Random Low Oil Pressure warning

« Last post by mjmallia on December 23, 2025, 09:56:42 pm »

I would be inclined to double check the pickup as it would be in the back of my mind.

Otherwise cam phaser wearcan bleed oil pressure and also the oil feed in the chain casing can get blocked.....the one with the micro gauze in it

12

Mk5 General Area / Re: Random Low Oil Pressure warning

« Last post by PTR12 on December 23, 2025, 07:29:26 pm »

There wasn’t a whole lot. The entire mating surface covered in a thin layer.

13

Mk5 General Area / Re: Random Low Oil Pressure warning

« Last post by mjmallia on December 23, 2025, 07:17:26 pm »

It's rare that it does it for no reason in chill mode driving. My only suspicion or question is how much sump sealant did you put on as the excess could have broken off and be blocking the pickup. This happened to me by a garage who did the pickup and then months later the light came on. .......I stripped the sump off as I too said to myself the pickup has been done, and to my surprise the pickup was blocked full of excess silicone sealant.

14

How to Guides / Troubleshooting / Re: How To: Mk5 Heated Seats Retrofit

« Last post by Golf5FSI on December 23, 2025, 12:41:56 pm »

Hello community,

Sorry to revive this old thread.
I have early Golf 1.6 FSi 2004 LHD with standard manual heated seats from fabric.
Recently got leather heated seats where driver seat is electric and both seats have electrical lumbal support from Golf GT 2008 LHD.

Everythings works (electric movement driver seat, lumbal support on both seats, driver seat heating) except passager side heating.
Electric movement for driver seat and lumbal support is fixed with additional 2.5 mm2 wire direct to SC34 with 20A.
Electric lumbal support for passenger seat is fixed by reusing old wire for seat heating since is kl30 (SC37) and can't be used for heating anymore (+2007 seats).

Seat heating - passager seat - issue:
Added additional 2.5 mm2 wire and connect pin10 in both seat connectors.
Problem is that I have +12v power for only first 2mins on Pin10 after IgnON.
When 2mins is pass, there is no power anymore and no heating on passager seat. Heating on driver side working normally.
Thought maybe was controller (relay 1Z0959772) under driver seat, tested with two others (1K0959772 and 5K0959772) and result is same.

Borrowed constant +12v (Kl.30) from lumbal support to Pin10 on passenger seat, now heating is working, but discharges battery overnight.

Did I miss something?
What controls time for relay Pin10?

Maybe elegant solution is to connect Pin10 on the passenger seat direct to fuse box and get +12v from ACC (Kl.15, SC31 spare place) which will avoid battery discharge ?

Thank you in advance !

15

Mk5 General Area / Random Low Oil Pressure warning

« Last post by PTR12 on December 23, 2025, 12:11:04 pm »

I was driving last night pretty chill, and my car decided to make me crap a little by throwing a low oil pressure warning. I shut off the engine immediately and coasted to a stop.

The thing is that i JUST made an oil pump and chain replacement 400km ago. Pickup pipe and oil pan were cleaned thoroughly.

I took a risk and briely restarted the engine and to my surprise, no weird noises, no low oil pressure light, nothing. I checked obdeleven for the oil level and it seemed to go down when i lightly accelerated so to me that looks like the pump is doing its job (damn you VW for not putting a true oil pressure sensor in the damn car) I was close to home and drove it there. Haven't even thought of starting it since.

So the oil pump is working, the chain didn't break, the pickup pipe is clean. What could it have been?

16

Mk5 General Area / Re: Slight misfire

« Last post by mjmallia on December 23, 2025, 10:00:37 am »

Did you carbon clean the valves when the manifold was off?

Did you change all the injector seals also as they are one time use.

17

Mk5 General Area / Slight misfire

« Last post by Golfgti5 on December 22, 2025, 06:33:45 am »

I have a 2006 Golf GTi. It has developed a slight misfire. Only happens at low revs. If you drive normally you can feel the misfire, once you put your foot down it disappears.
I have run a diagnostic and it says misfire No2.
I swapped plug and coil pack for No4 but No2 still misfires.
I then removed the intake manifold, disconnecting the fuel pump, 2 x fuel lines and all the bolts.
Then replaced the injector on No2.
I now have a misfire on all 4 cylinders, but the car runs exactly how it did before.
I then did a pressure test on all cylinders, all of them were 175psi give or take 5%.
My last test was a smoke test, all was well but i was getting smoke coming through rocker cover breather.
I am now a bit stuck as where to go from here.

18

Mk5 General Area / Forge motorsport dump valve on ed30

« Last post by WOODYGREENWOOD on December 21, 2025, 09:36:20 pm »

Hi, my diverter valve is on its way out and i have been toying with the idea of getting the forge motorsport dump valve. my question is if i get it would it cause issues in performance compared to the oem dv. The car is r tech stage 2+. Any help/recommendations are appreciated.

19

How to Guides / Troubleshooting / P0299 with logs

« Last post by MKVASMR on December 18, 2025, 10:07:40 am »

So as some may know I have been battling this issue for quite a while now.
The car is running a stage 1 tune for around 2 years. And before someone goes in the direction that something is wrong with the tune. I already tried 5 different ones. With the same results.
Short story. Have a new pcv, dv, maf, turbo (oem) and checked for boost leaks. Only thing I haven't changed is the MAP which I've ordered since it's dirty cheap.
I also have some like cuts at between 3-4k rpm almost like missfires.

MAF / Load


Boost / Timing


Boost / Fueling

20

Mk5 General Area / Re: Chirping sound at low RPM - what could it be?

« Last post by mjmallia on December 17, 2025, 08:38:20 am »

The alternator belt if not changed in the last 5-10 years.

The one way pulley on the alternator (made by INA) do fail, and the chirping can be the belt slipping

A pulley on the cam belt loop

I had them all LOL when I got the car years ago.