cgar mike Posted March 29, 2006 Share Posted March 29, 2006 I need help..replaced blown motor in 88 carbed justy..carb was somehow messed up..bought another carb thru internet salvage yard..same problem= wont pump fuel to carb..turn on ignition/no 12v @ fuel pump..introduce 12v manually @ pump for a few seconds to fill bowl of carb and "JUSTINE" starts right up..sounds sweet..then dies..my original carb would let her run for a few minutes(without jumping 12v to pump) then start sputtering..if I pulled to side of road & waited 30 sec. it seemed carb bowl would fill back up & we could drive like a demon for a 1/2 mi or so & then start sputtering again...new mailorder carb is dead as a stone unless i jump the pump..I know all the vaccum and pollution hoses arent correct because the cannister on pass side wheel well has 2 vac nipples looped to each other with a short peice of hose..(I paid a mechanic "friend" to pull the old engine & stab the "new" one in..I wasnt there to see it get disassembled & he ended up towing JUSTINE back to my casa) my wife is not thrilled with my obsession..why do 3-cyls need a carb with 5 wires coming out of it???????? Link to comment Share on other sites More sharing options...
75subie Posted March 29, 2006 Share Posted March 29, 2006 just wire a universal 12v fuel pump up so it is on constantly, thats what i did on my brat. once the fuel bowl fills, the pump stops pumping, then when it needs more fuel, it pumps in some more. i wired mine right up to the coil so it comes on when i turn the ignition. Link to comment Share on other sites More sharing options...
GeneralDisorder Posted March 29, 2006 Share Posted March 29, 2006 just wire a universal 12v fuel pump up so it is on constantly, thats what i did on my brat. once the fuel bowl fills, the pump stops pumping, then when it needs more fuel, it pumps in some more. i wired mine right up to the coil so it comes on when i turn the ignition. BAD, BAD idea. If you get in a wreck, the fuel pump will not shut off, and crete a serious fire hazard. Other soobs have a "fuel pump control unit" that will shut off power to the pump when the engine is not running. The Justy most likely has something along those lines. I would start looking for it. Have you changed the fuel filters? Classic symptoms with your old carb.... I'm sure you have thought of that tho. GD Link to comment Share on other sites More sharing options...
75subie Posted March 29, 2006 Share Posted March 29, 2006 thanks alot GD, that makes me feel safe while driving my brat:lol: it was a quick fix, that works well. i guess i`ll try wiring it in somewhere else. Link to comment Share on other sites More sharing options...
GeneralDisorder Posted March 29, 2006 Share Posted March 29, 2006 Have a look for the fuel pump control unit and wire it to that - I think it gets power from the choke?!?! Weird I know, but that is what I remember. Get one from an EA81 CA model as they are simpler to wire - light blue instead of black. In your Brat (Gen 2 right?) it's above the hood release under the dash. GD Link to comment Share on other sites More sharing options...
cgar mike Posted March 29, 2006 Author Share Posted March 29, 2006 I need help..replaced blown motor in 88 carbed justy..carb was somehow messed up..bought another carb thru internet salvage yard..same problem= wont pump fuel to carb..turn on ignition/no 12v @ fuel pump..introduce 12v manually @ pump for a few seconds to fill bowl of carb and "JUSTINE" starts right up..sounds sweet..then dies..my original carb would let her run for a few minutes(without jumping 12v to pump) then start sputtering..if I pulled to side of road & waited 30 sec. it seemed carb bowl would fill back up & we could drive like a demon for a 1/2 mi or so & then start sputtering again...new mailorder carb is dead as a stone unless i jump the pump..I know all the vaccum and pollution hoses arent correct because the cannister on pass side wheel well has 2 vac nipples looped to each other with a short peice of hose..(I paid a mechanic "friend" to pull the old engine & stab the "new" one in..I wasnt there to see it get disassembled & he ended up towing JUSTINE back tried filter FIRST..if I leave 12v to pump gas comes pouring out of carb actually shorted ignition out with gasoline.not lucky enough to try THAT again... Link to comment Share on other sites More sharing options...
RONAN Posted March 29, 2006 Share Posted March 29, 2006 Make sure all of your vac hoses are in the correct places. Link to comment Share on other sites More sharing options...
IdahoJak Posted March 29, 2006 Share Posted March 29, 2006 Mike, sounds like you need to make sure everything is connected right before you'll have much luck fixing the problem. If you don't have a factory service manual you might be able to look at one at the dealer and make copies of pertinent pages (they let me). Or you might get one on ebay, there is one for sale now: http://cgi.ebay.com/ebaymotors/Used-1988-Subaru-Justy-Factory-Service-Manual_W0QQcmdZViewItemQQcategoryZ119140QQitemZ8050971611QQrdZ1 Just for the record, it is not my auction. You said when the 12 vdc was connected full time to the fuel pump, you got gas flowing out of the carb. Sounds like the fuel return line is not connected, or maybe the float valve in the carb is stuck open. I still think the best thing to do is look at a factory manual and ensure all the vacuum and fuel hoses are connected right. Good luck and post back with your progress. Link to comment Share on other sites More sharing options...
cgar mike Posted April 3, 2006 Author Share Posted April 3, 2006 Must have been a really bad person in a previous life..made a bid of $20 on JUSTY MANUAL (I thought)..told the seller I would send money order then & there..not sure computer is "bug free" dont want to put credit card # in..next thing I see auction over..manual sold to "sergioiii"...for $10.95 much sadness..RONAN sent excellent engine bay fotos allowing me to see 1 component on drvs side firewall with NO vac lines to it..supposed to have 2 lines to it my buddy apparently broke little plastic nipple off side port when pulling motor..then left other line off totally..so small I never noticed the unbroken nipple..can't order one..dont have a clue what it is..can't pull one from wrecking yard there are none out here in new mexico.. AM GOING TO TRY TO EPOXY A PLASTIC NIPPLE CUT OFF OF A DRIP IRRIGATION FITTING.. sergioii..HOPE YOU WANTED IT AS BAD AS I DID..:brow::brow::brow::brow: Link to comment Share on other sites More sharing options...
bushbasher Posted April 3, 2006 Share Posted April 3, 2006 The 6 wires for the carb are choke, idle jet control solenoid, Float bowl vent solenoid, and the main jet control solenoid.(I dont know the book names for these) The carb is computer controlled, the ECU is beside the steering column under the dash. I haven't ventured into fuel pump control cause it works on my car. I know the ECU doesnt control it because the fuel pump works with the computer disconnected. My advice is to try and follow the wires from the pump. Subaru is usually pretty good with wire colors, you should be able to keep track of them as they go through the harness. Link to comment Share on other sites More sharing options...
Recommended Posts
Please sign in to comment
You will be able to leave a comment after signing in
Sign In Now