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  1. Morning all, long time no see. Been somewhat quiet around my Polo for a while, not least because nothing seems to have gone wrong for a long time... the silence is deafening... I'm driving down through France again this summer and as part of my checks i thought it should be about time to have a look at the fuel delivery system, especially seeing as E10 is now here and most of the rubber is OEM still on my Mk2f. I've had the odd hesitation now and again which I've diagnosed as a minor fuel pressure problem (either old pump or likely just a need for a new filter) so have decided to just do the whole lot in one go. Has anyone done this recently? I've bought a few lengths of SAEJ30-R9 fuel hose from CODAN, with my verniers i noticed that the vast majority of lines and connecting barbs want an 8mm ID (or i suppose 7.9mm / 5/16") hose so thats nice and simple. Got some nice stainless hose clips too (the 'jubilee junior' style rather than the worm band type). For the 'sump' (that square filter / fuel reservoir thing) to pump inlet connection the part is a proprietary 10mm to 12mm ID pipe (Part 19 in the diag). Found some guys in Deutschland who make new ones but I've had luck squeezing hose over a slightly oversized barb before with the help of some hot water so going to try some 10mm ID hose. Found a NOS 'original teile' Bosch pump on ebay that i snapped up. The old one sounds like a buzzsaw and almost 30 years of service is probably more than enough to guarantee retirement! As for the supporting bracket (14) the original looks horrendous under the car, and it'd be nice to at least try and refurbish it if so much new stuff is going on. However it doesn't look all that complicated to me - surely some mild sheet steel bent into a sensible shape with homes in the right places for the bush bolts to attach will suffice? Has anyone else knocked up one of these before? Sitting here with a coffee before work it feels like it'll be easy but I can imagine i'll cave and just scrub up and paint the grotty old one when it comes to it! As for the rubber lines in the engine bay the two that concern me are the inlet and outlet lines to the MPI body and the injector (8 and 9). The injector-end of these has two big brass elbow unions that look like they're swaged onto the hoses - I can't find any info on how these were originally connected / whether they're simple to remove and replace etc. The square 'sump' / filter (16) I've found on ebay as an un-branded pattern part for £80 so haven't bought one on a whim yet. I managed to find a picture of one cut open and it has a screen filter that runs between the input/return and the pump side barbs on it. My feeling is as its not cracked it should be fine to keep, perhaps give it a clean in a pot of petrol to see if anything on the screen can be swirled loose. Very little info online about these apart from folks who have cracked them and have found them hard to source. That leaves all of the 'hard' lines that make up the majority of the fuel system - all nylon it feels like. Can i run on the assumption that these can all stay as they are? Thanks for the help!
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