I am having problems with my 94 civic cx the fuel pump is not working and I'm not getting any spark it will turn over fine I have already replaced the main relay and have also put in a new ecu thought it was just a fuel problem but checked for spark today and had none is this a bad ground somewhere maybe? Any input will help

 

Check the G101 ground on the thermostat housing, 15A hood fuse 31, and 15A dash fuse 24.

 

Already have and nothing even cleaned the ground on the thermostat and made sure ithad a good connection still nothing

 

How did you test fuses 31 and 24?

 

I haven't tested them but the fuses were good even replaced with new and nothing. I will test them tommorrowto see if they have power going to them

 

This^ is the logical next step. Both top test tabs of each installed fuse should have battery voltage to body ground.

When you turn the key from off to ON(II), does the CEL turn on and then off after 2 seconds? Or does it stay on steady?

 

Steady it stays on the whole time

 

This is called CEL code 0 and, in conjunction with a no-start problem, generally indicates that the ECU is not getting either voltage or ground.

 

That is what I thought but wasn't completely sure I will test the fuses to see if I'm getting anything if they are not how do I fix it?

 

It's more productive to identify the problem before discussing the fix.

 

I will post the results tommorrow butim almost positive that it will not have any power cause I've eleminated almost everything else it could be

 

It's possible that both tabs on both fuses will have voltage and that the problem is a bad wire (1) between fuse 31 or 24 and the main relay, (2) between the main relay and ECU, or (3) between the ECU and the G101 ground. (4) It's also possible that the ECU is bad.

If the one of the fuses does not get voltage, then (5) there's probably a bad wire between the ignition switch or hood fuse box and the fuse.

Obviously, some methodical electrical testing is needed to precisely pinpoint the problem.

 

Ok so I tested #31 under the hood it has power but I can't find #24 under the dash it only goes to23

 

You'll find the dash fuse box diagram in the Electrical section of the FAQs sticky.

 

Dizzy

 

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