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Guest Message by DevFuse
 

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1979 Subaru Brat Fuel pump no go


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10 replies to this topic

#1 levears

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Posted 04 January 2014 - 01:47 PM

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



#2 ivans imports

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Posted 04 January 2014 - 01:52 PM

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



#3 levears

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Posted 04 January 2014 - 04:45 PM

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



#4 moosens

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Posted 04 January 2014 - 05:54 PM

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.



#5 junk250

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Posted 05 January 2014 - 02:56 AM

It could be anything, but there is an inertia/crash fuel pump shutoff switch that will cut power to the fuel pump.


Edited by junk250, 05 January 2014 - 02:58 AM.


#6 moosens

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Posted 05 January 2014 - 03:06 AM

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

#7 ivans imports

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Posted 05 January 2014 - 12:44 PM

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



#8 junk250

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Posted 05 January 2014 - 11:54 PM

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.



#9 eddie1334

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Posted 06 January 2014 - 02:21 AM

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.



#10 ivans imports

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Posted 06 January 2014 - 11:24 AM

yellow wire to - side of coil black and white to + side



#11 Mtbakeris

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Posted 17 January 2014 - 12:14 AM

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






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