My 1993 civic will not start. It dose spin over but will not fire. I changed the main relay but did not help also i dont hear the fuel pump either. I was going to replace it but instead of the normal 12.5 volts going to it there was only 0.5 so wtf is wrong with it please someone help me. I just put alot of money in the front end of the car an would like to drive it back an forth to work.

 

Turn key on but don't crank. The oil and battery lights should come on. The check engine light should come on then go out. The main relay should click on when the key is first turned, and click off when check engine goes out. (During the time it is on, fuel pump would run).

 

you replaced the main relay with a new one or known working unit ?

If so test voltage for the fuel pump wires at the relay, hopefully someone can tell you the colors

if good there start the pump or relay work your way back or forward and see if you can find a break or test voltage at any connectors

did you check for spark ? can you here the fuel pump prime?

if you in central Florida i got a pump you can test with

gl

 

main relay is new an the fuel pump will not prime an i do have spark. The last time the car started i had to leave the key turn on for 45 seconds before it prime but after that nothing now.

 

Sounds like bad power capacitors in the ECU. Try another computer.

 

ok im a little buzzed but i am gonna try to help .....

before when it would prime after 45 secs that was before the new relay ?

I gonna llok for my helms to see if I can figure out which wires go to the pump from the relay so you can test at the relay to see if you getting 12v there

how did you check for voltage at the pump ? did you remove the connector from the pump and test ? or was still connected ?

I think you should be able to run wires straight from the battery to the pump to test... but you might want to wait for someone else to chime in before you try that

how many miles on the pump ? original ?

 

yes 45 secs before new relay an we did check volts at relay an it was fine an fuel pump was checked still connected. An i had the car for 11 years an i believed its the original

 

remove the connector from the pump and check the voltage

 

[QUOTE=egsleepercivic;51474785]remove the connector from the pump and check the voltage[/QUOT
i will try that man thanks.