I have a daily driven '89 DX hatch. A few weeks ago, it suddenly died while driving, with no previous symptom. I had it towed home, suspecting fuel pump since I couldn't hear it.
Did the following:
1.Tested volts at pump, nothing under any key position.
2. Applied 12V to gr/r wire at pump - pump then ran fine. (but car still would not run even with pump hot-wired)
3. Replaced fuel pump relay. Still no start. I get 12V to the pump when key is in "start" but no voltage in "run"
4. I don't notice any smell of gas at the tailpipe
I've read elsewhere that there is a flapper valve in the intake that triggers the relay. Is that a likely fail point? Or would the fuel pressure regulator be more likely? Is there a way to test the fuel pressure on the 323?
Also, most cars (I think) have a fuel pump that runs when key is "on" for a few seconds to prime the system. I don't see anything in the circuit that would do that.
I really need this car to be running
Did the following:
1.Tested volts at pump, nothing under any key position.
2. Applied 12V to gr/r wire at pump - pump then ran fine. (but car still would not run even with pump hot-wired)
3. Replaced fuel pump relay. Still no start. I get 12V to the pump when key is in "start" but no voltage in "run"
4. I don't notice any smell of gas at the tailpipe
I've read elsewhere that there is a flapper valve in the intake that triggers the relay. Is that a likely fail point? Or would the fuel pressure regulator be more likely? Is there a way to test the fuel pressure on the 323?
Also, most cars (I think) have a fuel pump that runs when key is "on" for a few seconds to prime the system. I don't see anything in the circuit that would do that.
I really need this car to be running
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