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Re: 1993 900 NA fuel pump help- asking Justin, et, al... Posted by Justin VanAbrahams [Email]  (#32) [Profile/Gallery]
(more from Justin VanAbrahams) on Fri, 18 Jan 2019 13:28:46
In Reply to: 1993 900 NA fuel pump help- asking Justin, et, al..., t, Fri, 18 Jan 2019 11:02:15 Members do not see ads below this line. - Help Keep This Site Online - Signup |
Securing the plastic fuel pipe to the pump with a hose clamp is probably not a good idea - I don't think that will give you the result you want. If you can't trim the pipe and get a new/unused section over the new pipe, it's probably best to use rubber hose & hose clamps. Just a thought.
The "ejector valve" is a siphon pump. It uses a small portion of the high pressure output of the fuel pump to create a venturi that sucks fuel from the tank into the bucket. Here's a cool video demonstrating the principle:
https://www.youtube.com/watch?v=HHa42cY0QZI
If the bucket is dry, I would indeed suspect the siphon pump, but the problem could be the pump itself (literally never seen one fail, there are no moving parts) but is more likely the electric pump not doing what it should. My suspicion is that the hose clamp/plastic pipe is not creating a good seal and thus the fuel system isn't pressurizing, but it could be a bad pump, or a miswired pump, or maybe incorrectly installed flow & return.
Some thing you could look at:
Remove the banjo on the input side of the fuel filter and see if you get flow from there
Remove the banjo at the feed to the fuel rail and disconnect the return from the fuel pressure regulator and see if you get flow there
There is *definitely* a mark on both the pump cover and the tank for alignment. My recollection is an arrow on the pump and a little line on the tank. The pump generally won't fit if it's misaligned, and I *think* if it was forced into position the two possible casualties would be damaging the siphon or losing access to the last couple gallons in the tank.
posted by 66.60.157...
, Fri, 18 Jan 2019 13:28:46 <-- Viewing This Message
, Sat, 19 Jan 2019 10:50:20, Sat, 19 Jan 2019 12:05:28, Sat, 19 Jan 2019 11:29:46, Sat, 19 Jan 2019 12:01:49
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