please help fuel pump problems red top sr

[driftiteasy0113]

i am doing an sr swap in my 89 s13. we got everything done today and tried to crank it. the fuel pump didnt prime at all. and we have the wiring right i believe.do you have to rewire the fuel pump when you do the sr swap in and early s chassis? can anyone give me suggestions please? wiring diagrams?

also we cranked it with the cas unplugged and we couldnt get oil pressure to build.any help with this as well?please let me know guys,thanks

[driftiteasy0113]

and yes i have searched

[virus77]

how are you checking for oil pressure? Gauge, dummy light, cranking with no oil filter?

Is you fuel pump dead, run direct power to it and see if it comes on. If it does then just run the black/pink wire to the ground on a relay and a switched ignition to the other side to swtich it on. Have a nice battery + going to the relay with the output going to your fuel pump. Not only is this a mod but it will for sure run your fuel pump in case you managed to screw up the wiring earler(should be black/pink to black/pink). If you dont know how to wire a relay and you need more guidance read an articel on wiring relays. If you still dont get it, post here and I'll draw you a diagram LOL...

Seems like a lot of fuel pump problem lately.

[driftiteasy0113]

so your saying to do this from the fuel pump relay?ya i think a diagram would help me understand better haha

[virus77]

I'm bored so I drew you this factory certified diagram. Grab one of these blue relays from under your hood, you should have extras, i've never seen a 240sx that needed all the relays lol. just match the diagram with the little numbers on the pin where the relay connections are. The same diagram with the coil and switch symbols is also drawn on the relay



Modified by virus77 at 11:32 PM 10/2/2009
Modified by virus77 at 11:35 PM 10/2/2009