INSTALLING INLINE ELECTRIC FUEL PUMP
HELLO! MY INTANK FUEL PUMP QUIT AND SOMEONE INSTALLED A INLINE PUMP. THE PROBLEM IS WHEN I TURN ON THE KEY TO POWER IT UP, IT TURNS OFF AFTER TWO SECONDS. THE NEW FUEL PUMP RELAY IS SPLICED TO THE O...
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You might want to post what chassis you have so anybody with good knowledge of that particular chassis / model / year can offer some help.
With a Chevy P30 chassis, when you first turn on the key the engine computer causes power to be applies to the fuel pump relay for two seconds to supply fuel under pressure to the fuel rail.
Then when you continue to turn the key to start the engine, power is applied to the fuel pump relay once again as the engine is cranking over.
When the engine starts and oil pressure comes up, the fuel pump relay drops out and a pair of contacts in the oil pressure sender close to provide power to the fuel pump. Those contacts then become power to the fuel pump so long as the engine is running and producing oil pressure. The relay is no longer providing power.
Apparently you are tied into the fuel pump system somewhere that is not providing power once the engine is running.
Is your problem that the engine starts and then quits once you let off the key???
With a Chevy P30 chassis, when you first turn on the key the engine computer causes power to be applies to the fuel pump relay for two seconds to supply fuel under pressure to the fuel rail.
Then when you continue to turn the key to start the engine, power is applied to the fuel pump relay once again as the engine is cranking over.
When the engine starts and oil pressure comes up, the fuel pump relay drops out and a pair of contacts in the oil pressure sender close to provide power to the fuel pump. Those contacts then become power to the fuel pump so long as the engine is running and producing oil pressure. The relay is no longer providing power.
Apparently you are tied into the fuel pump system somewhere that is not providing power once the engine is running.
Is your problem that the engine starts and then quits once you let off the key???
