levears Posted January 4, 2014 Share Posted January 4, 2014 I pulled to motor out of my brat to clean up the engine compartment and the motor. Now I've put it all back together and it won't start. At this point I can't get the fuel pump to run. If I put power directly to the pump it operates. If I put power to the wire from the voltage regulator to the fuel pump it operates. With the Key in the off position one wire to the voltage regulator has power. when the key is in the run position three of the wires have power. Regardless of key position the fuel pump doesn't run, even in the start position. Is my voltage regulator bad? What other things should I check? Any help would be great. Thanks Simon Link to comment Share on other sites More sharing options...
ivans imports Posted January 4, 2014 Share Posted January 4, 2014 my 79 brat will not pump if engine is not running has to be primed thru carb if it sits more than a month needs to see charging voltage to operate Link to comment Share on other sites More sharing options...
levears Posted January 4, 2014 Author Share Posted January 4, 2014 ivans imports. Thanks that's useful information. I had another car of this vintage where the fuel pump wouldn't run with the key in run, unless the engine was running, but the fuel pump would run in start. Thanks Simon Link to comment Share on other sites More sharing options...
moosens Posted January 4, 2014 Share Posted January 4, 2014 Alternator to V/R to fuel pump. the service manual recommends you replace the V/R and alternator at the same time. One guy here said "that's phooey" and that manuals lie sometimes ....granted there are supplements issued and service memorandums ....but I've had great success when you change both. Yes , I know you probably had both in great shape and are wondering how the alt. could go out but ....you tell us what you found , please. One wire is telling a story it seems. Check for break. Good luck. Link to comment Share on other sites More sharing options...
junk250 Posted January 5, 2014 Share Posted January 5, 2014 (edited) It could be anything, but there is an inertia/crash fuel pump shutoff switch that will cut power to the fuel pump. Edited January 5, 2014 by junk250 Link to comment Share on other sites More sharing options...
moosens Posted January 5, 2014 Share Posted January 5, 2014 Where is that? Not really right to say it could be anything. Very limited. Please show me where my inertia switch is on my 78 wagon. Thanks Link to comment Share on other sites More sharing options...
ivans imports Posted January 5, 2014 Share Posted January 5, 2014 Mine will not run if car is not running and is 100% stock setup all original also check glass fuse at the ends on mine I changed all glass fuses 1rst thing have seen the ends come loose and not contact well . Cost 1,50 $ to rule that out Link to comment Share on other sites More sharing options...
junk250 Posted January 6, 2014 Share Posted January 6, 2014 Where is that? Not really right to say it could be anything. Very limited. Please show me where my inertia switch is on my 78 wagon. Thanks Well not anything, but could be a lot of things. (Ignition switch, bad fuse, bad wire, fuse link ect.) I believe most Subarus have an inertia switch because of the electric fuel pump. I'm not positive where it is, but I believe it is behind the drivers side panel by your left foot, below where the hood latch is, and behind the plastic panel. Link to comment Share on other sites More sharing options...
eddie1334 Posted January 6, 2014 Share Posted January 6, 2014 yeah im having the same problem with my 80 brat. did gaskets and some tlc and now only certain things work. starter horn lights but no spark to the dis. Link to comment Share on other sites More sharing options...
ivans imports Posted January 6, 2014 Share Posted January 6, 2014 yellow wire to - side of coil black and white to + side Link to comment Share on other sites More sharing options...
Mtbakeris Posted January 17, 2014 Share Posted January 17, 2014 I had the same issues I did a sub wire with a small 12v regulater connecting to my ignition so It would pump gas when my car is in accessory. Worked like a charm Link to comment Share on other sites More sharing options...
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