im having issues where my main relay is good and my fuel pump works. When i turn the key on it will not turn the fuel pump on. I put my relay in my friends civic and it worked. I used a jump wire to 1 & 7 and the fuel pump comes on. I see this is a common issue in 90's model hondas. i have a 95 civic Dx. Any help?

 

Check whether 15A dash fuse 24 is blown.

 

both fuses are good. very confusing

 

So did you jump 5-7 in the main relay connector? Does the pump run with this test?

 

just tried it fuel pump kicked on, ecu ground looks good. i had the issue where it seemed like the main relay was going out. Taking a while for the fuel pump to kick on now it doesn't at all

 

Sounds like a bad ECU. Plug everything back in and then unplug ECU connector A.

Turn key to ON(II) and then ground terminal A7 or A8 in the ECU connector. Does the pump run everytime you ground the terminal?

 

the terminals where the main relay goes right?

 

The ECU is behind the passenger kick panel.

http://www.phearable.net/images/tech...schematics.gif

 

so i jump A7 to A8?

 

No. With key in ON(II), use a wire to ground terminal A7 in the unplugged connector to the metal frame under the dash.

 

fuel pump didn't cut on

 

What was the wire color at the terminal you grounded? Key in ON(II)?

 

yellow & green

 

Grn/Yel? Key in ON(II)?

Describe what you did. Just need to make sure test was done correctly.

 

 

ok i unplugged A terminal on the ecu. put my jumper wire inside the plug where the yellow green wire is and turned the key on nothing happened . Opened the ecu and it has a burnt spot on the motherboard

 

Where is the jumper wire in your picture? The wire is Green/Yellow not Yellow/Green. There's a difference.

 

the black wire on the left side and the yellow & green one

 

Can't help you if you don't follow instructions.

 

im trying i dont much about this stuff

 

ok i tried the wrong wire i found the green and yellow and it still didn't kick it on

 

Is it by chance under a capacitor?

Capacitor would look like this:

 

yup little black circle under it and its broke on one prong

 

I believe you finally managed to do Ron's test correctly by finding the Green/Yellow wire which I am thinking confirms it being the ECU.

With the popped cap in the ECU, you could try replacing the capacitor and see if the ECU is still good and if it fixes your issue.

Ron may have more tests to verify things even though it looks pretty cut and dry with your recent discovery.

 

ok thanks for the help guys i ordered a ecu and just gonna try it out. Ill update what happens when it arrives