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I've not had any fault codes other than the one I caused pulling injector leadI dont think any flagged errors clear immediately so it should still be visible with a scan for fault codes.
So to the experts... If I take my car to the vw specialist now even when its NOT failing to start, how likely do you think it is that they will be able to diagnose the problem, e.g using vcds/vagcom
It'd be impossible to diagnose using vcds then if nothing was logged.
I would have thought it would be at the time the fault code is logged you would have an issue, if no fault is logged then is the part not still operating within the working tolerances?Impossible to say as none of us know for sure what the issue is.
My advice - now that the MAF issue seems to be sorted, is to see how it goes, and see if the problem rears its head again. Fingers crossed one of the things youve done so far has helped and that's the end of it.
Not true at all, there is a lot more to VCDS than just code reading. If all you want is code reading there are scanners for £30 on eBay.
VCDS has the ability to display live data for pretty much every sensor and elecrtrical component on the car, a sensor can fail or start to provie an inaccurate reading and won't necessarily throw a fault code
The point is no one knows what is causing it to fail to start and only after being sat for 3 or 4 days and from what tests I've done so far it hasnt really given any clues. Plus anytime the prob occurs there are no fault codes shown.I would have thought it would be at the time the fault code is logged you would have an issue, if no fault is logged then is the part not still operating within the working tolerances?
It may be within certain parameters but doesn’t mean it is reading accurately. MAFs are well known for this, usually under reading but won’t throw a fault code unless extremely bad or there is a short to ground etc.I would have thought it would be at the time the fault code is logged you would have an issue, if no fault is logged then is the part not still operating within the working tolerances?
The point is no one knows what is causing it to fail to start and only after being sat for 3 or 4 days and from what tests I've done so far it hasn’t really given any clues. Plus anytime the problem occurs there are no fault codes shown.
I think either the issue is the lift pump is running weak on occasion, hence the pulsing hose and bursts of fuel (unless someone says that’s normal) or maybe it’s my injector seals are leaking. Other than that I would have thought its battery related as I can’t see why it would only occur after a few days. Something must be building up or running down during that time.
Not that I can seeAre you sure when your cleaning the waters getting somewhere it shouldny