captaincalamity wrote:Wow Em - Sounds like a great idea, what kind of magnet, any links to what would work best, how do i get to the bottom of the tank, where is best to place the magnet?
I am not Em of course
but I think I can answer. The magnet (pretty much any magnet, all sorts are on Ebay) needs to be near the bottom of the tank. This normally means taking the tank sender unit out of the top of the tank and simply dropping it in. Because it's a magnet and the tank is steel it will stick to the floor of the tank and attract any rust onto itself. However, because it is a magnet and some of the filler neck is steel, you cannot get it in the tank that way (or at least, by no means I am aware of), so it is quite a big job to do (on a T25).
captaincalamity wrote:Although thinking about it, why would it run ok when you keep the throttle on?
You do have a point there. If it was the strainer, it would likely run worse at high throttle, when fuel demand is at it's highest. Same with semi blocked filters etc.
Blocked jets on the other hand will cause your symptoms.
This may be irrelevant, or not. A VW Scirocco uses a very similar Peirburgh 2E carb. On ours, years ago, I had the same symptoms, ie intermittent no tickover / low speed running. This had me going for weeks, like you. What it turned out to be was most odd and a faff to sort out (and a bit tricky to even explain, I will try). There is a drilling in the carb body, like an internal tube, that takes fuel to the low speed jets. When I took my carb off, I tried blowing and sucking on the jets with a bit of soft silicone tube. Strangely I found that sometimes I could suck, but not blow
Logic told me that "something" was intermittently acting as a "one way valve". Logic also told me this should not be possible as the little cone filter was in good nick, and there is no other way crud can get into that part of the carb.
Paragraph !
So, I noticed that at one end of this "drilling" (you can see traces of it's presence on the outside of the carb) there was a blanking plug at one end, just like a mini core plug. It drilled it and levered it out. Low and behold there was a tiny lump of what appeared to be rubber in the "drilling" (internal pipe way). It just fell out when I turned the hole downwards. God knows how it got into there ! I filled the place where the blanking plate had been with a cut down bolt that was an interference fit, helped with a bit of epoxy resin
It worked fine after that.
Not saying this
is your issue, probably isn't, but just could be
Might be worth checking jets with the carb off (20 minute job). Maybe sucking and blowing as I did, you never know.
Trouble with splitting the carb is you nearly always need a new gasket ! (does anyone know where you can get just the top to bottom half gasket for a 2E2 ?)
