gsr_b20b

Hey so my girlfriends car is having a no start issue. Its a 93 hatchback dx automatic. She was driving and pulled over for a minute and as soon as she put the car back into drive it died. The past 2 weeks we've had issues with the fuel pump relay, when the same thing would happen. So I assumed it was just that. I replaced the fuel pump relay but that's not the issue. If i turn the key to the on position (when the fuel pump should prime) but its not priming. So I checked with a test light to see if there's power at the fuel pump relay and there is power on 2 wires of it which I assume is normal. With the test light I found that there is no power at the fuel pump if the key is turned on and there's no power being sent to the fuel pump when the motor is turning over. The main relay clicks like it should and I also have tried a different main relay with no luck. I've tried pulling codes but the check engine light just constantly stays on and doesn't flash to reveal a code (with the little blue ecu plug being jumped). I've checked the ecu fuse but its fine. Then me and a friend decided to run a hot wire straight from the battery to the fuel pump. And run a ground to the body of the car off the fuel pump. With this the fuel pump turns on and seems to be working. I try turn over the car but it won't start. Im really stumped here, could it be a bad ecu? Or some sort of other fuse/relay? Please help!

Former User

When the engine won't start, does the starter still crank the engine fine? If so, have you tried cleaning and tightening the G101 ground attached to the thermostat housing?

gsr_b20b

yes the starter still cranks the motor fine. ill check that ground, could it be something so minor?

Former User

Yep

gsr_b20b

Cleaned all engine grounds including the thermostat ground and still no power to the fuel pump.

Former User

Check whether 15A dash fuse 24 is blown.

gsr_b20b

I checked, its good

gsr_b20b

im getting so confused, different pgmfi relay, different fuel pump relay, just tried a different ecu, cleaned all fuses in the engine compartment, including the thermostat ground. checked all the main connections on the tops of the strut towers in the motor bay and still no power to the fuel pump

gsr_b20b

didn't clean fuses I meant to say cleaned all grounds

Former User

Is there spark at the plugs?

gsr_b20b

ill test that in a bit and let you know

gsr_b20b

would a 5spd ecu actually work in a automatic civic? cuz I tried the 5spd p30 ecu out of my ef in my girlfriends car lastnight. And still had no power at the fuel pump

gsr_b20b

Car is also getting no spark. Replaced distributor and still no spark. But there is power going to the distributor. Could something be disabling the distributor and fuel pump?

Former User

1. Unplug ECU connector A.
2. Turn key to ON(II).
3. Ground pin A7 or A8 in the unplugged ECU connector to the metal frame under the dash.
4. Does the fuel pump run?

gsr_b20b

Okay ill try that. You mean ground the ecu or ground the "a" plug on the harness?

Former User

The A7 or A8 connector pin, not the ECU.

gsr_b20b

Just tried grounding those 2 wires and no fuel pump power still

gsr_b20b

Even ran a test light off the fuel pump plug to test as well

Former User

Was the key in ON(II)?

gsr_b20b

Yes it was

Former User

Your test result tells you that the problem lies in the main relay circuit rather than being a bad ECU.

Do you have a multimeter?

gsr_b20b

Oh okay that makes sense. I can borrow one from a friend

Former User

Post again when you have a multimeter and also post a picture of it if you don't know how to use it.

gsr_b20b

Okay I will do. Thank you for the help so far

gsr_b20b

this is the multimeter