All Things Mk5 > How to Guides / Troubleshooting
Couple of issues
csrigo:
I have a slight miss on cylinder 2 at idle. Don't notice it while driving and it doesn't count enough to register an EML
I've changed the plugs and packs to rule that out. I have an issue with oil in the chamber also as there was some oil on the combustion side of the plug...not drenched but on the thread mostly however some was on the electrode..thght that was my issue but changed the plug and same...swapped packs etc no joy.
For background my turbo is passing a little so I'm gonna check the inlet and or intercooler pipe closest to the inlet to see if there is excessive oil and see if that is potentially my oil issue...im going to change cam cover gasket..pack side of plug is dry but replacing anyway.
Checked vcds and hpfp/fuel rail pressure seems ok...req 50bar actual 50bar....im assuming is ok. Can't find the block for injector quantity?
I'm getting a shot of a compression tester this week to check for the worst in case it's something more sinister.
I think the injector may be seeping also....i get the miss at idle. Also on cold starts in the morning the first 30 secs of driving is hesitant...like burning excess fuel when cold??
Any ideas or common related issues...apologies for the long post.
Cheers
mjmallia:
could be the carbon build up on the valves, as the engine is a direct injection.
colesey:
BG44K should clear the injectors. Mine was getting slow to catch in the mornings and the idle was a bit uneven however the additive cleared that pretty quickly.
csrigo:
--- Quote from: mjmallia on September 25, 2018, 02:21:09 pm ---could be the carbon build up on the valves, as the engine is a direct injection.
--- End quote ---
--- Quote from: colesey on September 25, 2018, 03:40:54 pm ---BG44K should clear the injectors. Mine was getting slow to catch in the mornings and the idle was a bit uneven however the additive cleared that pretty quickly.
--- End quote ---
Cheers for the replies.
@mjmallia your right I'm due to clean them as a matter of course as I suspect they are gummed up a bit with just over 100k now.
@colesey I might give this a bash for the sake of £20 had a nosey online may be a good shout.
Right next thing...if it is the injector and it doesn't clean thru...what injectors am I sticking in for an upgrade?..all 4 obviously..the car has been sidelined as my toy so it is going tte420 at some point but wasn't planning on doing the injectors if I didn't need to. And if it is ttrs/rs3/rs4 can these be run with my current stage 2+ Apr map with no issues...i have loba hpfp, RS4 Rtn valve but no upgraded lpfp yet.
Cheers
Dan_FR:
BG44K won't fix the injector, they need removing, flow testing and proper cleaning, if they can be salvaged at all. If its bad enough to cause a persist ant misfire then get them done sooner rather than later
Your standard injectors are fine for a TTE420 - only need a FPRV to up the fuel pressure as the 136Bar item you have now won't be enough, and no you cannot run different injectors without a suitable map, which you won't get from APR
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