Recent Posts

1

Mk5 General Area / Cylinder 1 Misfire,

« Last post by xcb789 on Today at 02:04:57 pm »

Hi all,
I have a misfire problem under load from cylinder one, Idles fine albeit not perfectly smooth but when it comes onto boost or try for high throttle it stumbles and the engine light flashes. Swapped coils and plugs and still cylinder 1. Ran some injector cleaner through it and it does seem to idle a bit smoother but still getting misfires. If you ask only 30 ish percent throttle then it will climb the rev range okay. It is when asking a lot of it that it goes. Floor it and it just stumbles at any revs. Is injector looking most likely? I understand these engines get carbon build up but that would cause different behavior wouldn't it?
Thanks for any replies.

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Performance Modifications / Re: BCS 200 Cell Sport Cat - Remap Needed?

« Last post by Marticus on Today at 11:17:37 am »

From what I've read yes you will need a remap or you will get over boost errors at the least.

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Performance Modifications / Re: RTMG Race oil pump

« Last post by Marticus on Today at 11:16:37 am »

I'll try to help here, but please don't take this as gospel I'm only going by what I have seen from researching the project myself and don't have any first hand experience (hopefully others will chime in)

1: from the looks of it. This looks like the same or similar to the 1.8t oil pump conversion that a lot of companies offer. Maybe there are some differences but it's unclear from the description.

2: the pump itself can be fitted with the engine in the car, and doesn't need to be timed. But after watching some vids about the 1.8t conversion. The pulley on the crank should also be changed which might prove more difficult.

3: from what I have heard, the biggest issue with these conversions is the the stock ea123 oil pump has two check valves for the oil pressure. Whereas the 1.8t pump only has one. This can result in unstable oil pressure. (Again I don't know if that's the case with this specific kit). There is a solution to that which is to go with a 1.8t filter adapter plate that reintroduces a second check valve in the same place it goes on the older engines.

I'm weighing the same conversion when rebuilding my engine, there is also advantages in that Bar-tek in Germany sell a baffled sump to work with that.

But it seems that to do it you should do it properly and address the pressure regulation too and costs add up.

The other option is if course taking an angle grinder to the original balance shafts 

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Performance Modifications / RTMG Race oil pump

« Last post by NorwegianMK5 on Today at 11:01:07 am »

Hello a few questions so i’ll make it short.

Does the race oil pump for the ea113 from rtmg performance replace the whole balance shaft assembly?

Can you do the job without dropping the engine?

Do i have to time the pump, if so what do i do?

Considering the balance shaft is removed, do i need to tune the car again for this change?

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Members Rides / Re: Marticus' Red GTI

« Last post by Marticus on Yesterday at 09:42:39 pm »

Ok, another small update, but progress is still progress.

After a quick check with some calipers and a trip to the hardware store I came home with some m6x20 bolts and washers.

It turns out that the intercooler is threaded for these but the radiator will take the old self tapping screws.

The only real issue was getting the new AC condenser to fit to the intercooler as it didn't want to line up. But after extending one of the holes in the brackets I made it work.

So after all that the new cooling stack is together:

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Mk5 General Area / Re: Tyre Recommendations - Golf GTI (2008)

« Last post by dennis10 on Yesterday at 10:00:24 am »

My Edition30 came with Dunlop Sportmaxx RT2 tyres - they're decent and I've had the RT1 tyre in the past.

But my go to tyre is always the Goodyear Eagle F1 - amazing tyre, have had it on a number of cars including my V6 Mk1 Audi TT.

Have just had Goodyear Efficientgrip performance 2 tyres fitted to the Rav4, but too early to tell.  Have had Efficientgrip 1s before, decent all round tyre

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Cosmetic/Interior Modifications / Re: front bumper conversion

« Last post by Markack on Yesterday at 07:41:15 am »

I know this is way too late and would be interested to know if you completed this mod? I just changed out to a gti front bumper on My mk5 golf fsi 1.6 today. Was certainly not a straight fit and required cutting and finessing to get it to fit.

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Mk5 General Area / Re: Tyre Recommendations - Golf GTI (2008)

« Last post by Flyingscotsman on Yesterday at 07:07:48 am »

I'm running Continental Sport Contact 7s on my 18 inch Monza 2s.  Done just under 10,000 miles on them and wearing well so far. With rotation of tyres should get another 10,000 out of them.

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Mk5 General Area / Re: rough idle/misfire without fault code

« Last post by generalen15 on July 14, 2025, 09:47:26 pm »

Interested in this thread as I (like many it seems) have this idle misfire type thing every now and again.  Goes away as soon as throttle is pressed, never have a problem when driving around.  Have the oil control rings to replace when I find the time, hoping it is that.  I have no codes or errors and it drives perfectly except for this.  I did test with the MAF unplugged and it seems to run alot better with no misfire.  MAF has been replaced, along with all the usual items, so I'm hoping it will be the control rings.

have you check the channel 14-15-16 for misfire live data?(status must say enable/active)  also 91-93 for vvt, 103 for lpfp and 140 for hpfp. i have 4-5bar on 103, 50bar on idle (140) 27-28kw and 0-3kw(warm engine) on 91-93 should be good as that what i have on idle with new chain+tensioner and rings from VAG, also you should check the PCV if its leaking, and if u maybe should see which Cyl is misfire ofcourse test swaping coil and plugs to different Cyl and if the problem still is present is to change place on the injectors...

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Members Rides / Re: Marticus' Red GTI

« Last post by Marticus on July 14, 2025, 08:58:32 pm »

Started playing with the new cooling stack today:











All looks compatible, but the old screws that are looking self tapping screws going into the plastic end tanks, are not going to work with the alloy S3 intercooler and radiator.

So now I'm off to ETKA to try and find the correct bolts..