Never any need to get heated.
True - I'm probably well guilty of that, sorry. Anyhow, I'm not getting heated - just 'pasionate'!
I think the main issue is trying to find a fault from behind a keyboard. Its much easier to have a car infront of you to then see fault codes, listen to how its running/starting etc to then use your knowledge to find the fault.
You are so right! 'Suppose that is one of the main perils we run as forumites!
I mearly listed parts that the OP should be able to look at himself. By the sounds of it, most things have already been looked at, which leaves other things that may or may not contribute to the starting issue.
I guess you meant well with your intentions
- and I suppose you wanted to make sure you touched all 'bases'. I just reckon that too MUCH info can potentially be as bad as too little. I suppose you are damned if you do, damned if you dont! Anyway, peace mate!
There have been quite a few reports of poorly running cars due to excessive build up on the intake valves. Maybe I should have changed it from carbon to sludgy oil.
I'm not convinced this as big a problem as is being made out. Don't forget, the vast majority of these claims come from America - where they have very poor fuel quality (compared to Western Europe), and use poor quality oils. North American fuels still contain very high levels of sulfur (which is the reason why North American FSI engines can't run in lean-burn mode, and why ALL European cars in North America are not recommended to use longlife oils - which are invariably mid- or low-SAPS).
Threre must now be millions of direct injection cars on Europes roads (VW Group with their FSI, Mitsubishi with their GDI - and now Porsche, BMW and Ford are all introducing the technology), yet there is not a sniff of an 'epidemic' relating to sludged up valves!
The title has been changed from the original to have the 'Large Carbon deposits on Injectors' added after that issue had been found.
Sorry, didn't realise that.
The DV could be letting in air from atmosphere if there is a substantial crack etc. So its worth giving it a visual check.
Hmmmm . . . technically, you
may be right. But I'd find it hard to believe it possible to cause that kind of physical damage - weather bolted onto the K03, or remote on the K04. And if is was like that, you'd hear it leak, and feel the performance loss.
When I say you can pressure test before the turbo I dont mean just checking the intake, i mean you can add the pressure before the turbo which will then pressure test the whole system up to head. Just a miss understanding of what I meant. Everyone should be able to read my mind
Oi - I think like that too!!!
Cats also get damaged from excess heat. They can shrink and then block pipework. More common on aftermarket cats, but ive seen collapsing on oem cats too.
Hmmmm. OEM ceramic cats should never get damaged from excess heat. Ceramics have a truely massive thermal tollerance - sommat like 2,500 degC. Indeed, modern cars actually inject fuel during the exhaust stroke to then burn in the actual cat to quicly ramp up its operating temperature.
You may be right with steel substrate cats though. But then OEM-wise, no Volkswagens have steel cats, they are all ceramic. And only 'RS' (and R8) Audis have steel - normal Audis, and even 'S' Audis also have ceramic.
Im not trying to cause extra expenson on the OP.
Sorry, didn't mean to point the finger at you personally. It was more of a generalisation, mainly aimed at stealers who repeately mis-diagnose, whilst charging their customers!