1993 Honda Civic Repair Question
What are the symptoms of a bad fuel pressure regulator?
It could be that or the Idle Air Control Valve, IACV.
Here is a walk through diagnostic for your situation, just follow the link below;
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I have never seen an FPR fail on a honda. Your problem, if you are not getting fuel after it's warmed up is most likely your main relay. If your main relay is fine, have a look at the fuel pump
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Speaking about the main relay, been there before with a 98 Honda Accord-DX and got me good-between it and the ignition switch-No fun
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