Fuel Filter System Priming - Ford Powerstroke Diesel Forum
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Old 04-01-2007, 09:56 AM
LTJDS
 

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Question Fuel Filter System Priming

Does anybody know if after releasing the pressure in the fuel system, when changin' the filter? Do you have to re-prime the filter housing b-4 you start her up again. If so HOW?
I believe some trucks prime by cycling the ign key back and forth to get the pump to prime, but I may be thinking of Gas and not Diesel Fuel Injection.
Any Info would help. I am installing a fuel pressure gauge and I want to make sure I can start my truck after exposing the closed system to depressurization and the intro of AIR,,,, THANKS ALL
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Old 04-01-2007, 10:28 AM
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I've only changed fuel filters once so far, but no problems here. You can hear the fuel pump running when you turn the key on. After I changed the filters and both cannisters were bone dry, I turned the key on and waited until the pump quit making noise. The truck fired right up and didn't miss a beat!

I am assuming that the filter housing on top of the engine has some sort of self bleeding valve on it. If that's not the case then it must force the air back through the return system to the tank.

Hopefully one of the techs has the full "correct" answer, but you shouldn't have any problems with air based on my limited experience.
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Old 04-01-2007, 02:04 PM
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I have changed my fuel filters a few times and I just pull the old ones out and put the new ones in, never a problem. I make sure I change both filters each time and I lube the o-rings with a little oil befor I install them. The only other thing I do is "cycle" the key a couple times and fire it up. I dont notice any smoke, rough idle or any of that stuff. The only thing I hate is the mess when I change the filter on the frame, "dont wear your best shirt" - I hope this helps.
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Old 04-01-2007, 07:15 PM
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Smile Thanks

Thank you guy's . Your info helps ALOT Just needed some reassurance that their were no hidden obstacles. THANKSSSSSSSS. ltjds
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Old 04-01-2007, 07:23 PM
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On the 4X4's the front drive shaft is in the way. I would spent 15-20 bucks and get one of the sockets off eBay if you don't have huge sockets. It is much easier and worth the money spent!!!
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Old 04-01-2007, 07:30 PM
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On the 4X4's the front drive shaft is in the way. I would spent 15-20 bucks and get one of the sockets off eBay if you don't have huge sockets. It is much easier and worth the money spent!!!
__________________
alot easier defently worth the $$

Matt
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