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Guest Message by DevFuse
 

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Seeking Fuel Pump "Relay" location


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2 replies to this topic

#1 Petersubaru

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Posted 09 January 2008 - 02:03 PM

My Haynes is very limited for my '86 ea82 Hitachi carb non-feedback..I believe that the "rev sensor/fuel pump control box" functions somewhat as a relay for the fuel pump..But is there another "separate" relay located somewhere else for the fuel pump..Thanks

#2 mdjdc

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Posted 09 January 2008 - 02:12 PM

There is a box over the hood lacth in the left kick panel. That is the relay for the fuel pump. It functions to cut fuel pressure in the event of an accident.

#3 Gloyale

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Posted 09 January 2008 - 04:06 PM

There is a box over the hood lacth in the left kick panel. That is the relay for the fuel pump. It functions to cut fuel pressure in the event of an accident.


That is the Rev sensor/FPCU. It will not power the pump unless an ignition pulse is pressent.

Have you tested for spark? Does you're Tach work?

If you have a multimeter with a rpm function, you can test the yellow(??) wire at the rev sensor as if it was the negative side of the coil and see if you get an RPM signal. If no signal, the Rev sensor will not power the pump.

If there is signal, but no voltage sent to the Fuel pump. it could be the rev sensor's gone out. Check the fuses first, to make sure that the circuit has voltage.




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