im not getting voltage to my pump and i replaced the main relay, it used to prime but somewhere along the line it stopped i would enjoy some insight

 

Detailed car information?

 

How's the battery? How's the battery connections? Fuses okay? Stock? Are you in the right section EJ1 (this is the EF section)?

If those are ok and your test for voltage was done right then your next step would be to check the harness.
Which is where an official honda manual would be very helpfull.

 

how about your ground wire connected to your thermo, thats where your pump is grounded to even if the screw seems tight redo it, look at that wire as well

 

its an 88 hatch was a dpfi i got a conversion harness to run a b16 with a p28 and ran into some issues that the guy before me did ill re check my ground, all my fuses are good

 

well as it happens i am a liar and im not getting power to the main relay what could be the issue a fuse?

 

The main relay should get voltage on two wires when the key is in ON(II). Which wire doesn't have voltage?

 

well i just took a voltage meter to the plug im getting small amounts of voltage to two pins
one is gettin .24v and the other is getting .09v seems really low to me

 

To check the main relay harness first check for continuity between the black wire (which is on the upper left most pin/wire in your drawing) and a body ground, with the relay unplugged and the ignition off.
If there is not continuity then that wire needs to be repaired.

If continuity is fine the next step is to check the voltage between the 2 left most pins/wire ( upper and lower left, black and yellow white), battery voltage should be available. If it is not check the wiring between the battery and the main relay as well as the ECU fuse (15A) under the hood at the main fuse box.

There are a 3 more steps in the manual but I'll leave it at this for now, hopefully this can help

 

thanks alot ill go do that

 

alrighty i got power to the main relay via fuse i have 14.4v and have continuity and i checked voltage at the pump and im only getting .04v with key on i do get full voltage to the sending unit

 

To check the voltage at the fuel pump plug you'll need to use a jumper wire at the main relay plug (with it unplugged of coarse). Jump the 2 pins on the bottom right in your drawing (black/yellow and yellow/black).

Then with the ignition turned to the on position, at the fuel pump plug check for battery voltage on the 2 right most pins when looking at it with the release tab up (black and yellow/black).

If it has voltage then the pump is bad, If it has no voltage check the main relay and wire harness ( there are 3 more things to check there)

 

With the key in ON(II), two wire terminals in the unplugged main relay connector should read battery voltage to body ground. If not, a fuse may be blown.

 

hey thanks guys i got it all figured out last night and started it up for the first time with the new b16 thanks guys!

 

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