Editing Fuel Pump Upgrade (section)

==From the Forum==

(1) The piece of hose from the pump to the carrier pipe, should be the submersible type rubber fuel hose for in-tank usage ~ it's no biggy, but eventually the standard type hose may crack/split in that environment, and you'll end up with low fuel pressure at the injector rail/fuel regulator (in-tank pressure leak)


Be sure you're prepared to replace the fuel pump feed/return hoses between pump cover spouts & car...if they're anything like mine were, they'll go to pieces/split in the process of removing them, and leak badly when under pressure.


If replacing the stock OEM fuel pump with commonly available aftermarket pumps, you will find reference to 'Type 1' & 'Type 2' pump assemblies. The only difference between the pumps is whether or not they have the 'pulsator damper' (FPD.. fuel pulse damper); elsewise they have identical specifications ~ as far as Nissan is concerned, the ausdel R31 models all had the 'Type 2' setup with FPD (which makes sense really...the output spout from the pump is offset, and you don't need to bend the pump carrier output pipe to line things up, which is what you need to do with a Type 1 no FPD pump). The FPD was only included to reduce cabin noise ~ I haven't noticed any additional noise after fitting a no FPD Type 1 pump.


When replacing the stock OEM pump with an aftermarket unit, you will invariably face the following wiring issue -- the aftermarket pumps are usually terminated with spade type terminals (and you get a pigtail to suit, typically with some connector attached you can't use), whereas the OEM wiring terminates with crimped eyelets, which are attached to threaded post terminals on the pump with M4 nuts/washers. To workaround this, some aftermarket pumps have wide spade terminals with a hole drilled in them ~ the hole is nearly M4 so you only need open it up a tiny bit, and you can attach the existing wiring eyelet to the spade terminal using a M4 screw/nut/washer...this is what I did. If however the aftermarket pump has slimmer blade terminals, it's best to cut the eyelets off the existing wiring, and crimp on appropriate female spade terminals.

 


[[Category:Engine]]
[[Category:Electrical]]