E-pump inlet pressure
E-pump inlet pressure
50harleyrider
12-22-2020, 03:47 PM #8I wanted to revive this thread in light of my recent starting issues and did this. Replaced the oe gas fuel filter and the engine fuel filter today and thought I would check lift pump operation and get a bit of fuel in a beaker to fill the filter prior to starting. I removed the filter, placed the beaker in the filter cavity, turned the key on and nothing. Is there a valve in there that stops flow if the filter is removed and there is no back presure? I may have a lift pump issue. I am using the oe ford in tank gas lift pump and it has worked fine for a couple years. should I just remove it and rely on the IP scavenging pump or get another lift pump or fix mine? the donor W210 had no in-tank lift pump if I recall. From AlanMcR post 2 maybe that pump on the side of my IP is the culprit? right now I am going to disconnect the fuel line feeding it and see if my lift pump will work. I'm thinking it may have damaged those internal plastics in the benz pump over time. It does make about 3 bar pressure so we'll see.
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