Fuel pump relay
Thread Starter
Pro
Joined: Apr 2006
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From: Perth Western Australia
Fuel pump relay
if power to the maf relays runs through fuel pump relay, with the burnoff(or click of maf relays) still happen if the fp relay is stuffed?
also, if the fp relay is not working, how long/hard will it be to start the car.
all help is much appreciated
also, if the fp relay is not working, how long/hard will it be to start the car.
all help is much appreciated
Le Mans Master
Joined: Feb 2006
Posts: 8,753
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From: Louisiana
Didn't understand the first question. If the fuel pump relay is faulty it might take 3-4 cranks to start. If it does take a while to crank I would check the CSV too. You can troubleshoot the fuel pump relay and CSV to find out what the cause is.
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Pro
Joined: Apr 2006
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From: Perth Western Australia
sorry, i wasnt clear.
will burnoff occur (or will i Hear the click of the maf relays) when the engine is turned off, after running for more than 5 minutes, if my fuel pump relay is stuffed?
(i am assuming its correct that the maf relays get there power through the fp relay)
will burnoff occur (or will i Hear the click of the maf relays) when the engine is turned off, after running for more than 5 minutes, if my fuel pump relay is stuffed?
(i am assuming its correct that the maf relays get there power through the fp relay)
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Originally Posted by ozvette87
sorry, i wasnt clear.
will burnoff occur (or will i Hear the click of the maf relays) when the engine is turned off, after running for more than 5 minutes, if my fuel pump relay is stuffed?
(i am assuming its correct that the maf relays get there power through the fp relay)
will burnoff occur (or will i Hear the click of the maf relays) when the engine is turned off, after running for more than 5 minutes, if my fuel pump relay is stuffed?
(i am assuming its correct that the maf relays get there power through the fp relay)
For running, the MAF Power Relay is energized through the redundant supply of power from the Fuel Pump Relay or the Oil Pressure Switch. If your Oil Pressure Switch is good, you can remove your Fuel Pump Relay and the car will start and run. It will just crank longer, because the oil pressure needs to get above ~4psi to close the Oil Pressure Switch and feed power to the Fuel Pump and MAF through and by energizing the MAF Power Relay.
