Reading some comments in another tread, I'm wondering if the issues we had earlier in the summer with the van dying at the top of long motorway climbs were actually related to the fuel pump. I'd thought there was a blockage in the fuel line somewhere, but there is very little, if any, crud in a fairly new fuel filter. But could it be that the fuel pump isn't up to it? Its an electric pump fitted by a PO. It says Bugpack, but I can't find a similar model online. There is a cut off valve just before the pump, but no pressure regulator after it. I had changed the fuel filter a month or so before we had the issues to a physically smaller one, but it should still be OK. After it died there was no fuel in the filter, tank side of the pump. removing the fuel line from the filter, petrol only slowly came out, even though the tank was nearly full, suggesting a blockage. But as I'd rather replace a fuel pump than get the tank out for a proper look, am I clutching at straws to think the pump is either failing, or was never up to it? We've never had the issue pootling around, only on long hills. 1776 with twin carbs.
You could buy a new pump, fit it...but you may very well end up taking the tank out to clean the blockage.
Yes gotta be the tank, or maybe the Bossa Nova. You could try blowing up the hose backwards for temporary relief. By all means try all the easy things first, I did, but the tank had to come out in the end.
I had a failing fuel pump maybe 6 months ago. The van would run ok for 20-25 mins then stop because of fuel starvation. Called out reovery a couple of times and both times it started again before they arrived only to repeat the failure after 5 mins the next time. It was one of the cheap square metal box type, fitted a new one and it was seriously liked I'd turbo charged the engine... must have been strangling the fuel supply pretty much since I bought the bus.
Is now the time to fit an access hatch to the tank sender - would give you easier access to the tank and maybe easier to clean
i had similar on mine - would run fine but on long climbs /wide open throttle for a long time it would die. when i fitted my afr gauge i found it was generally running too rich all the time, but the moment when it died on hills it was going super lean - ie no fuel. i did a bunch of re-jetting but the fix for this for me was bigger needle jets - ie the float bowls were running dry, slightly bigger jets allow the fuel to be replenished quicker so i don't run out.
It could be your new filter has a finer grade filter medium and the fine particles that went through the old filter are blocking the new filter... Think rust suspended as a fine dust in the fuel.. Even if you have a transparent fuel filter, the rust is about the same colour brown as the filter paper.. so it is invisible. Only when you take the filter off and one side is full of slightly cloudy fuel and the other side is empty you find the real problem..
