I'm not saying it can't happen, it's very often quoted yet I've never seen, during my searches regarding power loss, for which I have done many times having had various related issues, anyone who has actually found a delaminated hose to be the cause of their problem.
Like I said, I didn't say it can't happen but all but one of your examples are symptoms of another problem, not the cause. One of them is due to a restricted snorkel intake and not hose related at all. I'm not trying to argue with you, I'm just saying that delaminated hoses are often quoted but rarely the problem. Just to add, mine are fine. My intercooler is looking worse for wear so I think that is likely the problem. It's ballooned top and bottom as they often do and there are oil stains in the matrix suggesting a leak. The problem arises only really on hard throttle as the revs rise. My theory is that as the pressure increases due to boost, the air escapes from a hole or more likely a crack in one of the intercooler galleries opening further, causing a loss of boost. At least that's what I'm hoping as whilst a new i/c is not a particularly cheap fix, it's a simple one.
I'm tempted but I'm not sure I can justify the £300-odd (minimum) for an upgrade, which to make full use needs a remap which is another £250...
Oh, I know it's no Ferrari... it's my second td5. This one was great when I first got it but it's had a few issues which have been sorted. A dying fuel pump was my last issue, after fitting a new one, it went as good as ever but recently it's been struggling with power. I checked a few other things when I did the fuel pump, including turbo hoses etc and the intercooler looked in bad shape. I'm thinking it's giving up the ghost now and I'm losing boost through holes and cracks in it and it's a similar shape to the green oval which adorns our nemesis vehicles... I know it's not the manifold as that was skimmed and had the webs cut when my new turbo was fitted in February (the week before the head gasket failed...Ya have to rev the TD5 to get the grunt out of it..
I'm revving mine to 3k quite regularly to get it going.
below 2.5k it's gutless
)
I have checked it all, its exactly 13 threads, the push rod moves with a distinct stop, either end of its movement range, and I've drowned the wastegate spindle in penetrating spray. I did think there was a possibility of the wastegate being slightly stuck open, robbing the engine of boost but it seems to move freely. Also bear in mind it's a fully reconned turbo from a reputable company with a 2 year warranty, so it should be fine anyway.
I don't have a means to check boost, I just know it feels sluggish compared to how it used to feel. Having ruled out several suspects, it seems to be narrowed down to my rather sorry looking intercooler.
My MAF is dead and disconnected. Allegedly, on a 10p engine, the MAF is solely to control the EGR valve. Therefore if you have no EGR (like myself) the MAF is pointless anyway. When you read the explanations as to how it works, it does actually make sense. Even Wammers, the self proclaimed Oracle of diesel engines will tell you the same....
