I have a DB8(95-4dr gsr) integra and i've not been able to get the fuel pump to get power from the stock plug only through straight wire....so far i've checked all the fuses(under dash for main relay and under hood) and I thought the main relay was good cause I feel it click when I turn the key over but it won't get power to the pump, so I tried jumping pins 5 and 7 and the fuel pump got power so I replaced the relay and still no power anyone got any ideas?

 

check and see if you have power coming from the wire in the main relay....Like check the wire that goes from the relay to the pump...maybe the wire is burnt out.

 

Im going to do a slight snip to check for power going out from the relay, but I don't think the wire to the pump is burnt becausewhen I jumped pins 5 and 7 the fuel pump immediately turned on

 

http://www.tegger.com/hondafaq/mainr...ion/index.html

try taking a look at that. It shows you how a main relay works. If everything checks out ,its probally something in the wiring.

 

Alright reading it now thanks!

 

r u getting power from the fuse box? i had the same problem and the fuse box under the dash burned out

 

Ya just a bit ago I looked at the diagram for the main relay and noticed pin 8 has to ground out for the fuel pump to receive power so I sliced the wire open and ran a wire off it to ground it to basically see if the relay was opening when grounded to get power to it and it was the fuel pump immediately turned on and off when I removed the ground so im assuming my problem is in my ground wire that runs to the ecu so it can control when it gets power or not? Or am I missing something..

 

your on the right track.

 

Well I guess my next step is to remove my dash to follow the ground all the way to the ecu...

 

multimeter would help you do that with out taking the dash out..

 

true.

 

Happen to know where any diagrams might be or know if the ground from the relay (pin 7 that the ecu grounds to give power to the fuel pump) is a straight wire to the ecu?

 

i am having the same problem... is your cel is on ? mine isnt and all my grounds are good, all the fuses are good, fuel pump is good, main relay is good.... im stumped

 

nah my cel isn't on...I'm still convinced its my ground to my ecu.

 

check the engine thermo ground....

 

you should be able to use your helms manual if you have one.....There is diagrams in the back...

Otherwise google is your friend.

But im pretty sure the main relay powers the-PUMP,ECU,and accc.

 

well have the manual and found a pin out just figuring out which pin is it found which is for the fuel pump but not sure if its the power or ground so just stuck figuring that out.

 

here this might help...

http://www.phearable.net/tech/wiring/pinouts2.htm


also....try using a aligator clip and clip it to the relay and then to the wire on the pump...If you click the key and it works, you have a dead wire......

 

Well I figured out the problem after all the looking it turned out my ecu fuel pump circuit shorted out... fail