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Q: sometimes the car won't restart after being driven and warmed up. on 1992 Honda Accord

After driving and warming up then shutting it off the car sometimes won't restart.
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Have your fuel pressure checked, especially the rest pressure. When you turn off the engine, the fuel system should keep pressure in the fuel system, otherwise the engine will be difficult to start. Causes for the rest pressure to drop are a leaking check valve or a leaking injector.
try replacing your main relay especially if it happens during hot days. its and easy fix.
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