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I would replace that fabric lined hose if its original thats for sure! and get a zip tie on the end so it doesn't leak at the nipple.
Yes Rusty i had a few teething probs with the catch tank system i built a few years ago but then there wasnt as much common knowledge on it all. It didn't end up as complicated as the stuff thats being used now days. In the end I removed the N80 but left it plugged in, I also removed the PCV system completely and just fed the tank form the block with a 30mm hose (flame trap still in place) and from the head with a 19mm hose and then exited it out under the wing. So no vacuum return and no chance of boost leaks.
It seamed to work ok as the pipe under the wing used to smoke a little every so often (maybe thats not a good thing though )
No do you have any more WGFV's available so that i can rule mine out? It's one i got from you anyway a year or so ago, so hopefully still in good working order
No do you have any more WGFV's available so that i can rule mine out? It's one i got from you anyway a year or so ago, so hopefully still in good working order
Yeah i got a few left.
I dont think thats it though as if that was playing up the boost would just be low but the AFR wouldn't be that effected.
Come on guys, I spent saturday pouring over the car and said it in two posts - the breather sytem isnt the issue, it is simple and self contained except for joints to the MAF hose which was bunged, back of the head, block and sump return. There is no way it can be pressurising from the IM, I've looked all around it. It HAS to be via the block or head, and my guess is it's via the block.
Interesting on the point about the turbo oil return though. I hadn't thought about that. I think to bung at the throttle body and test the inlet tract including the turbo would rule that out. Also DV is a point.
Still think fuelling is a separate issue. It is there with or without boost.
I've seen two posts in this thread contradicting on whether there is overlap in the valve opening to allow air to escape that way or not... my experience shows that there is not but I guess the positioning of the cylinders in the bore is pot luck. Anyone got a definitive as to whether this is a possible cause, and turning the engine slightly and trying again would have been a good idea
Current thinking is to leak test the DV, test intake again (in particular rule out turbo seals) and then look at pressure testing the IM again and check for leaks all round it, prob pinch / bung all vac lines out of it to isolate, check IM gasket etc... finally look at a leakdown test in case it's losing it through the rings too quickly.
Once it's making boost the fuelling issue can be addressed, if it still exists (as i suspect it will). Try FPR in case, as if it was not working and taking the 5bar fuel pump pressure that would explain things, and it takes 5 min to swap...
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