SubaruNoobie Posted January 16, 2008 Author Share Posted January 16, 2008 "I took it off the car and hooked to a 55v battery charger..." Holeboy, if this isn't a type-0 you definitely need a fuel pump now!!! Did I forget to mention that the Charger has a 12v/24v/55v/Start/Stall selection switch on it. And that I used the 12v selection.. O.o;;; And that way it spits out fuel, but not when I put it back to the connectors on the car. I'm wondering about the ground thing.. where should I ground the pump onto the body at.. Sorry. Quote Link to comment Share on other sites More sharing options...
Skip Posted January 16, 2008 Share Posted January 16, 2008 Thats cool, sometimes battery charges with a brain need a proper battery connected to put out the proper voltage. I have several like this. I have also used these pumps as transfer pumps so they do move a lot of fuel when wired directly. as for " Do I need to ground the negative pole to the body of the car?" I'm sorry the question is a bit nebulous. this statement " Hooked up.. Even straight wired from the battery." If the latter statement means only the positive terminal of the pump was "straight wired"... Then yes the negative terminal of the pump, if connected to the chassis, will make the pump run. Sure hope this helps, I'm trying. Quote Link to comment Share on other sites More sharing options...
SubaruNoobie Posted January 16, 2008 Author Share Posted January 16, 2008 Thats cool, sometimes battery charges with a brainneed a proper battery connected to put out the proper voltage. I have several like this. I have also used these pumps as transfer pumps so they do move a lot of fuel when wired directly. as for " Do I need to ground the negative pole to the body of the car?" I'm sorry the question is a bit nebulous. this statement " Hooked up.. Even straight wired from the battery." If the latter statement means only the positive terminal of the pump was "straight wired"... Then yes the negative terminal of the pump, if connected to the chassis, will make the pump run. Sure hope this helps, I'm trying. Thank you thank you. I'll give that a shot. I just didn't want to ground it wrong and have it confuse the ecu and possibly break it...>.< Quote Link to comment Share on other sites More sharing options...
Skip Posted January 16, 2008 Share Posted January 16, 2008 Please do not leave the factory harness to the pump plugged in when you do this. I'm sure you meant to do it this way. Just makeing sure you do not back feed the ECU anything that may cause it's panties to get in a bunch. Quote Link to comment Share on other sites More sharing options...
idosubaru Posted January 16, 2008 Share Posted January 16, 2008 Because the relays and the ECU are.. I REPEAT. Are Good. there's a distinct possibility that the ECU is bad. the ECU can fail by not properly powering the fuel pump. i believe a specific transistor within the ECU will be fried in this case and if so everything else works fine and everything seems okay, no check engine light and the fuel pump won't power up...just like you said. in this case, the car will run if you direct wire the fuel pump (i've done it before). also.....i already mentioned this - if it's an aftermarket fuel pump that could be your problem. try an actual Subaru (get a used one for cheap) fuel pump. i mentioned my experience with an aftermarket fuel pump on my XT earlier in this thread. my car was running fine on the original pump but i wanted something younger than 20 years old so i bought a new aftermarket pump. the brand new fuel pump wouldn't work. worked fine off the car, installed it wouldn't do jack. install an old OEM Subaru pump and it ran fine...back to new pump, it wouldn't work. i don't know why and my "new" aftermarket pump is still sitting in my garage. i had no problems with the fuel system, i was just trying to get a pump less than 20 years old on my car!! if you do wire, be very careful and be sure to properly wire it - fuses and protection from the elements and stuff. Quote Link to comment Share on other sites More sharing options...
SubaruNoobie Posted January 16, 2008 Author Share Posted January 16, 2008 Okay... So.. I direct wired it . Bolted the ground from the negative onto the existing intake manifold. Ran a fuse and a Silver flip switch for the positive current the switch is laying in the floor and the wire is hooked up. Car starts...>.>; but the pump has to be turned on and off with each start/kill. That's a pretty simple fix. Pretty much what I wanted at first... Lol Screw existing wiring. Quote Link to comment Share on other sites More sharing options...
Skip Posted January 16, 2008 Share Posted January 16, 2008 What ever floats your boat sir. We here do not condone by-passing any safety devise that could cause harm to you or others. I am pretty sure I will not be alone in this feeling. We would like to help you fix the fuel system the way Subaru intended if you want. Quote Link to comment Share on other sites More sharing options...
SubaruNoobie Posted January 17, 2008 Author Share Posted January 17, 2008 What ever floats your boat sir. We here do not condone by-passing any safety devise that could cause harm to you or others. I am pretty sure I will not be alone in this feeling. We would like to help you fix the fuel system the way Subaru intended if you want. Nah... See.. I'm trying to just get the car to my home 100miles away from my friends home. After I get it there. I'm going to replace every existing part I can find for this. Make it top notch and original. This things practically a Classic now. Quote Link to comment Share on other sites More sharing options...
MilesFox Posted January 17, 2008 Share Posted January 17, 2008 if oyu dont want to forget the fuel pump swithc, you can replace the swithc with a relay off the + coil terminal (or ign fuse in fuse block) this way the pump will turn on and off with the key. Quote Link to comment Share on other sites More sharing options...
SubaruNoobie Posted January 17, 2008 Author Share Posted January 17, 2008 if oyu dont want to forget the fuel pump swithc, you can replace the swithc with a relay off the + coil terminal (or ign fuse in fuse block) this way the pump will turn on and off with the key. I was thinking about that.. A'right.. I'll get some pics up as soon I paint this car... Quote Link to comment Share on other sites More sharing options...
Skip Posted January 17, 2008 Share Posted January 17, 2008 You're welcome and Good Luck with you Classic. Quote Link to comment Share on other sites More sharing options...
SuBrat84 Posted January 17, 2008 Share Posted January 17, 2008 Okay...So.. I direct wired it . Bolted the ground from the negative onto the existing intake manifold. Ran a fuse and a Silver flip switch for the positive current the switch is laying in the floor and the wire is hooked up. Car starts...>.>; but the pump has to be turned on and off with each start/kill. I had mine hooked up to my radio 12v for a while... Okay, now with the car RUNNING get under there and get your multimeter out. Put the negative lead of your multimeter on ANY GOOD BODY GROUND and the positive lead of your multimeter can touch EITHER of the prongs on the connector now (bot not both at the same time!) One of them should be giving you voltage now. If it is, the GROUND WIRE in the plug is BAD. They do go bad if the shielding in them is messed up.. or something weird. You can still use the plug if you just attach an EXTRA ground wire from the pump terminal to ANY GOOD BODY GROUND.. leaving the old "bad" ground wire on there wont hurt anything. It never hurts to put extra grounds in. I do believe you said you are using an after market pump so make sure you have the polarity(+/-) on the terminals going the correct way. Quote Link to comment Share on other sites More sharing options...
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