Just installed e pump, need help!
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Freshman User
Joined: Feb 2012
Posts: 25
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Just installed e pump, need help!
OK so I just installed an electrical fuel pump and its working perfect. I'm getting fuel all the way to the filter but nothing comes out of the injector lines. The FSS clicks so its working but there's no or very little fuel getting past the IP. I suppose the IP could be bad but it worked fine before I installed the new e pump, I doubt that it just instantly stopped working. Any ideas?
Post Fiend
Joined: Nov 2005
Posts: 7,437
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From: Charles Town, W bygod Va
I read the other day that when the cold advance is on the return line is blocked, you could try unhooking it then turn the key on to let the EP do its thing and purg air out, then try bleeding it at the injectors.
Logistics Pro
Joined: Sep 2010
Posts: 4,411
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From: Victor, MT
I would have given the epump its own power...run wire to a switch from your pump, then from battery to a switch. Then turn it on whenever you go to fire it up....
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Fleet Owner
Joined: Jul 2006
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From: Mi'kma'ki
and you bypassed the stock pump?
relay looks like this;
pin #30 - positive (5 amp fuse here) battery post.
pin #87 - fuel pump positive wire.
pin #85/#86 - one of them ground,the other to the FSS.
the FSS wire still directly hooked to ip.
fuel pump negative directly to ground.
how much cranking time so far?
puller or pusher e-pump,and where is it installed?
with the e-pump running,you have fuel like crazy @ the schrader valve?
relay looks like this;
pin #30 - positive (5 amp fuse here) battery post.
pin #87 - fuel pump positive wire.
pin #85/#86 - one of them ground,the other to the FSS.
the FSS wire still directly hooked to ip.
fuel pump negative directly to ground.
how much cranking time so far?
puller or pusher e-pump,and where is it installed?
with the e-pump running,you have fuel like crazy @ the schrader valve?
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Fleet Owner
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From: Mi'kma'ki
the FSS triggers the switch when you turn the key on,and hooks pins 30# (from the battery) and #87 (to your device) together just as if you toggled it yourself.
im surprised his ip bled dry just by replacing the type of lift pump.i wonder if his check valve in the filter head needs to be cleaned.hmm.would that even explain why she dried up though?
i wonder if he first had a failure and is trying to correct it with an e-pump.this might explain things.......oops nope.first posts explains she was running fine before he started.im puzzled.well with enough cranking,the ip should fill back up and she should fire back once again eventually.
Fleet Owner
Joined: Jul 2006
Posts: 20,357
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From: Mi'kma'ki
this way,there is no draw on the FSS line.it's used to just "flip the internal switch" if you will,so that the draw flows directly from the battery (into pin 30) to the fuel pump (pin 87) without passing go.