bluebirds30

hi i have been searching and searching trying to figure out why u am not getting fuel now the fuel sending unit is fine I have a brand new electronic fuelpump and filter and I have it wired straight to the battery. I'm still not getting fuel. this is the thing I have a 1978 280z l28 motor installed what am I over looking what is going on? I have searched for the many times and still nothibg

bluebirds30

if you have diagrams of the fuel lines and or wiring for fuel or a link to another thread this would help also Like I said I can't find the info about the problems I'm having.

NismoPick

Welcome to ZDriver!

So is the fuel pump making any noise when it gets power?
Have you removed the output line on the pump to see if it's actually flowing?
And since you are running an EFI L28 instead of the stock carb'd L26, you are using a fuel injection pump, not carb pump right?

And you can download the FSM from XenonS30

bluebirds30

thank you now I just purchased the vehicle from its second owner who installed the motor just before parking it in 2004. the pump does come on but and now I have dropped the tank to clean it out and replace a "strainer" according to some guys at napa. was unable to find this "strainer" so will be reinstalling the tank tomorrow. now seethis is where I'm confused its dual carb/ fuel injected? this is what I was told. and no i did not pull the hose directly from the pump but I did pull the hose from the bay and was not recieving fuel. and the pump is a spectra premium universal electronic fuel pump.

NismoPick

It's one or the other... not both. The 240Z & 260Z (L24 & L26 motors) are dual carbs. The 280Z (L28E) is fuel injected. Maybe the guy used the L28E block and head, and used the L26 carbs?

A pic of your engine bay would clear this right up.

Welp... if you want to see if your fuel pump is pumping, wouldn't you check at the pump too?

That's a carb fuel pump ( Spectra Premium/Fuel Pump (SP8016U) | AutoZone.com ) so hopefully you are running carbs, otherwise it will never start. Carb fuel pumps put out 2-10psi while fuel injected pumps can put out 100psi. The L28E fuel injection needs 35psi.

bluebirds30

here's the bay see that seems to make sense I do know its l28 because I do have the recipts for the motor and same time I am happy I cleaned the tank wasn't terrible but deffinatly could have used the cleaning out but I will check from the pump as soon as its back together again and I had just assumed that it was flowing through the pump since it was brand new but sounds like I should try.

evandubya

Those would be carbs!

bluebirds30

see I knew that but I have pics and the recipts saying its a l28... confused on thisone. but then the pump should be good for the motor right?

vg30_s12

Check the head and block castings(passenger side on block and head)possiable someone swapped the fuel injection for old school su carbs

bluebirds30

hmm okay that makes mire sense. does the fuel lines go straight from the tank to fuel filter to pump to lines to carbs? or is there other routes.

bluebirds30

so Is there a second fuel filter besides just before the fuel pump I tried to download the service manual but for some reason can't get it to open