Any reason not to put the 12v fuel pump closer to the lift pump to shorten the electrical runs?
Self Bleeding Diesel Fuel System
Have had lots more questions about diesel fuel line routing.
Here are a few pictures of an Isuzu 4JB1-T setup, but the same for any diesel install.
Routing = tank, sedimenter, 12V fuel pump, engine lift pump, Fuel Filter, IP, return line back to tank.
Pump wiring from 12V relay =
86 - ignition circuit - white (+) when key is on
85 - ground (-)
30 - Positive (+) from battery (usually taken off main starter lead)
87 - (+) when key is on
No need to ever worry about bleeding the system.
If you run out of fuel or you change the filter, simply switch on the key, wait a few minutes, start the engine, and drive away.
If you get a bad batch of fuel, note the drain screw on the sedimenter.
Drain as many times as necessary until you purge all the smeckley and then drive away.
Here are a few pictures of an Isuzu 4JB1-T setup, but the same for any diesel install.
Routing = tank, sedimenter, 12V fuel pump, engine lift pump, Fuel Filter, IP, return line back to tank.
Pump wiring from 12V relay =
86 - ignition circuit - white (+) when key is on
85 - ground (-)
30 - Positive (+) from battery (usually taken off main starter lead)
87 - (+) when key is on
No need to ever worry about bleeding the system.
If you run out of fuel or you change the filter, simply switch on the key, wait a few minutes, start the engine, and drive away.
If you get a bad batch of fuel, note the drain screw on the sedimenter.
Drain as many times as necessary until you purge all the smeckley and then drive away.
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It depends on the pump, but if you're referring to the E8012S Universal Electric Fuel Pump that I started using after this thread was posted, there is a prefilter circled in red included with the pump that you simply leave off. Note the 2 pump fittings circled in green.
The reason for leaving the pump pre-filter off is because if it clogs, you don't know where to look to clear the clog and you don't need a 12V pump pre-filter with a sedimenter and proper fuel filter.
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click to enlarge
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The reason for leaving the pump pre-filter off is because if it clogs, you don't know where to look to clear the clog and you don't need a 12V pump pre-filter with a sedimenter and proper fuel filter.
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click to enlarge
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Gotcha. Mine doesn’t come with those… 👍🏼
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