ok so after drinving my car for an hour in the rain i got home, parked it, then wen to move it agian and it started fine. but while backing up i stalled it out on accident and now it wont start, it just cranks. my fuel pump wont prime and i dont hear the relay click. i just dont understand how it could be fine 1 sec and dead the next. i pulled the relay and took a pic.

 

Usually what happens is micro cracks develop. So small it is hard to see with the naked eye but they are really there.

few things you can do.

1. Get a 50-80w soldering iron and resolder every joint add a little rosin core flux to get the solder to flow better. And yes you need that big of a soldering iron. These relay use large copper contacts and are are excellent heat sinks. They will suck all the heat away from the solder joint. So you need something that can heat the joint up real quickly.

2. Plug the relay in with the cover removed when you click the key watch to see if the contact moves. Then take a DMM and measure to see if there is any voltage going to the fuel pump pin. (test carefully you can have voltage with 0 current). Your pump will also start then stop once it reaches the correct PSI. It only runs to maintane pressure.

3. Run a hot wire directly to the fuel pump and see if it starts (could be bad fuel pump) I had a similiar issue and every time it got hot outside the pump would fail. Replaced the pump problem went away.

Your problem is either your pump or relay. The relay in hondas is a common failure point.

You could also bypass the main relay and check to see if your car starts this would tell you if its the pump or relay. I would tell you how but there is a popular main relay kill on this site that is the holly grail of kills Anyway if you go to you tube and search for main relay bypass I think I posted something a long time ago about how to bypass that relay with 2 jumper wires.

 

i just installed a new fuel pump and new main relay... neither worked... car still wont prime and the relay still wont click

 

New or used from a junk yard? If used its a common failure on hondas it wouldn't surprise me if you got a bad relay.

Have you done the obvious and checked the fuse?

Nothing magic about the fuel pump circuit feed 12V directly to it and see if the pump turns on. If it doesn't then you have a bad pump. You could do the same thing by bypassing the main relay. Bypassing the main relay removes the main relay from the equation.

Have you checked to see if you have spark? I assumed you had a fuel issue cause you said the pump wont run. But it only runs for a few seconds unless the car starts.

 

i took the relay out of my brothers working civic and the pump is a brand new walbro 255hp

which fuse are you referring to? there is not "fuel pump or main relay" fuse under the dash or hood (97 integra)

 

ecu fuse was bad.. fixed

 

Cool fuses should always be first thing you check.