Golf V GT 1.4L TSI - service centre says I need 4 new injectors?!?!?!?!?!

[brad]

So, whilst similar events cannot always be the same conclusion, my misfire only happened when the car was cold and ended up being gunk and crap built up on the back of the valves. When cold the gunk was hard and stopped the valves closing properly but when warm became sticky and tacky and effectively sealed the valve.

My mechanics got the gunk out and the problem went away. Cost me about $600 to have it done. I was told that these engines can have that happen because the spray pattern doesn't always get to the back of the valves to keep the engine clean.

It's a direct injection engine. The fuel won't reach the back of the valve - ever. The injector is downstream of the inlet.

You could put a borescope / endoscope into the inlet and have a look. borescopes are cheap these days - I use a $20 unit and the video is acceptable but they are hard to manipulate.

Whether it be an injector or carbon build-up, the inlet has to come off so I'd bank on an inlet valve clean & pull the injectors for a test & clean.

I'd also ask what the partno for the new injectors is and shop around.

[Mattlock]

It's a direct injection engine. The fuel won't reach the back of the valve - ever. The injector is downstream of the inlet.

Ah yeah! That's what they said. Thanks for the correction.

[grtuned]

Definitely need to find out if there is a super session of the injector part number I'm unaware of different spray patters being used
If you can't find any change then I doubt that's the reason. I'll personally be checking around for a bulletin or tpi that may shed some light on this spray pattern change and see what I find.

[brad]

I'm not sure what block the GT has but the CAVE partno appears to be 03C906036F.

They are ~$280 on ebay; $135 on Aliexpress; $50 at $29 OEM VW Injector Eos Golf Jetta Passat CC 1.4 TFSI 03C906036F

[Umai Naa!!]

God that's cheap.

You'll want to hope that the installer has the fitting tools with the teflon seal-honing sleeves.

FSI (TSI, etc) injectors will fail because of carbon build-up, but rarely would you replace a full set. You'd only do the one that's gone bang, and clean the rest, along with a thorough cleaning of the intake.

[grtuned]

You get anywhere with this????

[warhead]

I remember reading somewhere else on this forum or another that the spray pattern had been changed in a different revision of the injectors so I didn't think to question the mechanic when he told me the same thing.

Anyways, since I was planning on selling the car anyway, I managed to find a buyer willing to take a gamble on the injector(s) being just dirty and needs a good clean rather than a replacement so I've since sold the car. I miss it already