LucasP Posted September 18, 2014 Share Posted September 18, 2014 So my good buddy is about to join the cult we call subaru owners. If all goes well he will be the proud owner of an 87 wagon on sunday. The car is in good shape inside and out, minus the bad fuel pump. I'm not worried about it running, I know its a strong runner, the guy just decided he didnt want his teenage daughter driving something so old and the pump went out after the last time I was up to look at it. My problem is, I have never changed a pump on an ea82 with fuel injection. All of mine have been webberized. We will be picking up the car about about dark and will need to swap a new pump in or tow it home with my 87... Lets say I'd rather not tow it the 55 miles home, and this is really our only chance to get him this car with our work schedules. So my questions are... Do I need to know anything special about ea82 with FI fuel pumps? Do these things have pressurized lines like most fuel injected cars? Am I going to need any real special tools? I'm more than capable of changing a pump... I have one term left on my way to being a helicopter mechanic. I just don't want any surprises when trying to get this done in a semi time frame 55 miles from home. Thanks guys. Quote Link to comment Share on other sites More sharing options...
Dee2 Posted September 18, 2014 Share Posted September 18, 2014 (edited) When I did mine on a ea82 90 loyale it was pretty simple. Just disconnect the battery first. The fuel tank line to the pump is gravity fed. Mine had 3 bolts and the power connector to remove. Edited September 18, 2014 by Dee2 Quote Link to comment Share on other sites More sharing options...
LucasP Posted September 18, 2014 Author Share Posted September 18, 2014 Anybody know if its actually a different pump than a non fuel injected ea82? Quote Link to comment Share on other sites More sharing options...
silverhelme Posted September 18, 2014 Share Posted September 18, 2014 An FI pump is definitely a different pump from the carb pump. It runs a much higher pressure than carb pump. Quote Link to comment Share on other sites More sharing options...
Gloyale Posted September 18, 2014 Share Posted September 18, 2014 It's an 87......are you sure it's FI? the 4wd models in that year were all Carbed.......if it's 2wd it will be FI. Process of replacement is the same either way. Quote Link to comment Share on other sites More sharing options...
l75eya Posted September 18, 2014 Share Posted September 18, 2014 You've heard about the ford f series dual tank fuel pumps? The Subaru fuel injection pump is expensive, yet an alternative that bolts in is the in line pump for 80s model Ford pickup trucks with the dual tanks. It's like 60 bucks. Carb pump won't work, not enough pressure. Quote Link to comment Share on other sites More sharing options...
86 Wonder Wedge Posted September 18, 2014 Share Posted September 18, 2014 Are you sure it's a dead pump? Could be a CAS or fuel pump driver module in the ECU.. Quote Link to comment Share on other sites More sharing options...
LucasP Posted September 18, 2014 Author Share Posted September 18, 2014 Sorry guys. Mine is an 87. The one needing the pump is a 90. Quote Link to comment Share on other sites More sharing options...
jono Posted September 18, 2014 Share Posted September 18, 2014 (edited) from what I have worked out with EA82 mpfi pumps is that there is two part numbers, and the difference between them is years, not NA V's turbo. Pump is easy to swap, more so if you can work on choppers, surely ? Two wires, two hoses - from tank is 1?2" nearly, outlet is std 8mm ? Two hose clamps Pump is external, mounted to a plate using 10mm nuts, right hand rear side of under car near front of swing arm. Spray some lube above and let sit a while as gets dry and rusty up in there. A generic efi external pump should do the trick. Test wires for pos neg and if aftermarket may need to nut the wiring out, swap plugs from old pump, solder , insulate so remains plug and play And yes, is no different to any other efi system, if pump is working, and there is fuel in it, FPR is functioning and no injectors are leaking, the line wil have pressure in it and spray out if you disconnect. If the pump is no good, maybe no pressure at all to deal with. To test it, need to T in a gauge in the line. End of line pressure seems to give me false readings, due to FPR not in circuit. 36 psi is target pressure Edited September 18, 2014 by jono Quote Link to comment Share on other sites More sharing options...
LucasP Posted September 19, 2014 Author Share Posted September 19, 2014 from what I have worked out with EA82 mpfi pumps is that there is two part numbers, and the difference between them is years, not NA V's turbo. Pump is easy to swap, more so if you can work on choppers, surely ? Two wires, two hoses - from tank is 1?2" nearly, outlet is std 8mm ? Two hose clamps Pump is external, mounted to a plate using 10mm nuts, right hand rear side of under car near front of swing arm. Spray some lube above and let sit a while as gets dry and rusty up in there. A generic efi external pump should do the trick. Test wires for pos neg and if aftermarket may need to nut the wiring out, swap plugs from old pump, solder , insulate so remains plug and play And yes, is no different to any other efi system, if pump is working, and there is fuel in it, FPR is functioning and no injectors are leaking, the line wil have pressure in it and spray out if you disconnect. If the pump is no good, maybe no pressure at all to deal with. To test it, need to T in a gauge in the line. End of line pressure seems to give me false readings, due to FPR not in circuit. 36 psi is target pressure This was exactly what I was looking for. Thank you for confirming what I had been thinking. Hopefully well will get his car home and post some pics of it here for everyone to enjoy. Quote Link to comment Share on other sites More sharing options...
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