Fuel pressure issue

[Dieselpowerking]

Alright guys I installed a facet lift pump 40222 got it all put together but one problem is I'm losing all fuel pressure at full throttle any help? This truck has to be towing Saturday morning. So I'm kinda in a rush.

 

[Thewespaul]

Where did you mount it? Did you use a relay? Did you keep the stock filter?

 

[Dieselpowerking]

Where did you mount it? Did you use a relay? Did you keep the stock filter?

By the fuel filter and it on a toggle switch had a relay but it drained the batterys and yes stock filter set up is what I'm using

 

[Thewespaul]

Try changing the filter. You will need a relay for that pump to operate to its potential

 

[genscripter]

Alright guys I installed a facet lift pump 40222 got it all put together but one problem is I'm losing all fuel pressure at full throttle any help? .

Do you have a reliable fuel pressure gauge? If yes, then what pressure are you getting at idle and what pressure is it getting down to at WOT?

@Thewespaul is right. Sounds like a filter issue. That duralift e-pump should be pushing plenty of fuel to your IP.

 

[Dieselpowerking]

Try changing the filter. You will need a relay for that pump to operate to its potential

I just put a brand new fuel filter on when I did this it's a wix.

 

[Dieselpowerking]

Do you have a reliable fuel pressure gauge? If yes, then what pressure are you getting at idle and what pressure is it getting down to at WOT?

@Thewespaul is right. Sounds like a filter issue. That duralift e-pump should be pushing plenty of fuel to your IP.

Pressure get down to 1 almost zero with full throttle at idle it had about 8 psi maybe a little more

 

[Thewespaul]

1 psi is fine, the pump just needs positive pressure going to it.

 

[Dieselpowerking]

1 psi is fine, the pump just needs positive pressure going to it.

So as long as it doesn't go to flat zero it will be good?

 

[Thewespaul]

Yes, and with a relay setup you will generally see more pressure

 

[Dieselpowerking]

Yes, and with a relay setup you will generally see more pressure

So how do you wire the relay then? I hooked it up the it said and it drained my batterys it's a four prong relay

 

[Thewespaul]

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[chillman88]

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Wes, what gauge should be run to the fuel pump and what size fuse? I will be doing this to mine tomorrow as well. Mine is a different pump back by the FSV but same principal.

 

[Thewespaul]

I’d start with a 15 amp fuse, and I really like autometer gauges, the ultralight series being my favorite. They have an electric fuel pressure gauge that I use for pumps

 

[whiteboyslo]

The only way the relay would be 'causing' your battery to drain is if you wired the 'switch' power (the one that is telling the relay to turn on), to a constant power source. Make sure it's tied to a switched 12V source, i.e. something that's only on when the ignition is on.

Mike