Dan90 Posted October 13, 2009 Share Posted October 13, 2009 I have 90 model brumby with an ea81 motor. When the pump is connected with the standard wiring (under the right hand side door from the pump to the battery) it does not pump any fuel. When a wire is connected directly from the battery to the wire under the right hand side door the pump will start working. I'm not sure where the wires go once the move forward past the door. Is there a wiring diagram or sorts somewhere to solve this? or would anyone off hand know? Cheers Link to comment Share on other sites More sharing options...
GeneralDisorder Posted October 13, 2009 Share Posted October 13, 2009 There is a tach pulse sensor that will not allow the pump to run unless the engine is being cranked. There may be nothing wrong with your pump wireing at all - have you verified that you in fact *do not* have fuel or may it be the case that you don't have spark/ignition? GD Link to comment Share on other sites More sharing options...
quartus Posted October 13, 2009 Share Posted October 13, 2009 Though probably not recommended, I had the same problem and circumvented it by grounding the NEG terminal on the pump directly to the mounting bracket. I'm sure I disabled some safety function though (ie turbo fuel cut out, etc) http://www.ultimatesubaru.org/forum/showthread.php?t=103540 Link to comment Share on other sites More sharing options...
Dan90 Posted October 14, 2009 Author Share Posted October 14, 2009 There is a tach pulse sensor that will not allow the pump to run unless the engine is being cranked. There may be nothing wrong with your pump wireing at all - have you verified that you in fact *do not* have fuel or may it be the case that you don't have spark/ignition? GD Will need to check what it is actually doing. When the pump is connected straight to the battery I can start the car and move it around the yard. So I would think it is pumping some fuel around (only put the motor back in last weekend). Will check and post what I find if I can't get it working. Thanks for the replies. Link to comment Share on other sites More sharing options...
Cougar Posted October 14, 2009 Share Posted October 14, 2009 The fuel pump relay should be checked. Link to comment Share on other sites More sharing options...
ferox Posted October 14, 2009 Share Posted October 14, 2009 I recently had the same problem, and in my case it was the Fuel Pump Control Unit. (Black box located next to the hood release under the dash.) http://www.ultimatesubaru.org/forum/showthread.php?t=99877&highlight=FPCU I also replaced the fuel pump in case the old one was drawing too much current and burning out the transistor. The old pump pumped well when connected to the battery, but that didn't really tell me how efficiently it was running. The car runs like a champ now. 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