Fuel Pressure issues
#11
#12
#13
Ideally, you will have 10 psi at WOT. The VP-44 will run on low pressure (5 psi or less), but that tends to be hard on it and can lead to premature death.
The new OEM pumps are crap - to get one that puts out enough pressure to keep your VP-44 happy, you have to go to the aftermarket.
Last edited by Dr. Evil; 02-23-2009 at 05:10 PM.
#14
---AutoMerged DoublePost---
I am using a switch and a light. With everything stock. Warning of pump failure was all I was looking for. I assumed a stock set up would keep everything working fine. I put an Edge EZ on over the weekend also. This has no effect on fuel pressure everything stayed the same. Would it make any difference if the switch is in the bottom of the filter housing or as the fuel line goes into the injector pump? My friend with the 02' has everything the same as mine and no flashing light until he goes WOT with his hyperteck programmer on performance. 140 horses or so.
BB
---AutoMerged DoublePost---
Yes, essentially we are looking for flow - the more flow the better because the VP-44 is lubed and cooled by the fuel. But, how will you measure flow without an expensive flowmeter? Instead, we use a guage to measure the pressure instead of flow. Most of the aftermarket lift pumps increase the line size to 1/2" so they can deliver more fuel to the VP-44.
Ideally, you will have 10 psi at WOT. The VP-44 will run on low pressure (5 psi or less), but that tends to be hard on it and can lead to premature death.
The new OEM pumps are crap - to get one that puts out enough pressure to keep your VP-44 happy, you have to go to the aftermarket.
Ideally, you will have 10 psi at WOT. The VP-44 will run on low pressure (5 psi or less), but that tends to be hard on it and can lead to premature death.
The new OEM pumps are crap - to get one that puts out enough pressure to keep your VP-44 happy, you have to go to the aftermarket.
Last edited by Big Bill; 02-23-2009 at 06:28 PM. Reason: Automerged Doublepost
#15
There should be no bleed hole as it has nowhere to bleed to. The bleed hole is very small. We are not talking about the feed holes for the banjo.
However, it looks like you are at the correct port.
The only real step between the OEM pumps and the full FASS is the FASS HPFP. The FASS DDRP is a stock equivalent pump with a 4 year warranty.
Dave
However, it looks like you are at the correct port.
The only real step between the OEM pumps and the full FASS is the FASS HPFP. The FASS DDRP is a stock equivalent pump with a 4 year warranty.
Dave
#16
#17
There should be no bleed hole as it has nowhere to bleed to. The bleed hole is very small. We are not talking about the feed holes for the banjo.
However, it looks like you are at the correct port.
The only real step between the OEM pumps and the full FASS is the FASS HPFP. The FASS DDRP is a stock equivalent pump with a 4 year warranty.
Dave
However, it looks like you are at the correct port.
The only real step between the OEM pumps and the full FASS is the FASS HPFP. The FASS DDRP is a stock equivalent pump with a 4 year warranty.
Dave
#18
I knew you would soon be here Dr.
I am using a switch and a light. With everything stock. Warning of pump failure was all I was looking for. I assumed a stock set up would keep everything working fine. I put an Edge EZ on over the weekend also. This has no effect on fuel pressure everything stayed the same. Would it make any difference if the switch is in the bottom of the filter housing or as the fuel line goes into the injector pump? My friend with the 02' has everything the same as mine and no flashing light until he goes WOT with his hyperteck programmer on performance. 140 horses or so.
BB
You need more than a warning that the pump is going out. This is especially true when you are running the OEM Carter LP - you need to see a guage so you can see exactly what the output of the lift pump is. Generally, LPs tend to die over time, and you can generally see it happening. And NO the stock setup is not really adequate for even a stock truck. It doenst matter iif you are stock or bombed - you still need a mechanical fuel pressure guage. You can install a mechanical guage very cheaply if you dont mind running fuel into the cab (its really not a big deal at all).
Yes, you can get a stand-alone pump - but they cost almost as much as the bad boy with the filters. I would suggest the Airdog 150 as they are on sale right now. yes, they arent cheap - but, if you buy from an approved vendor - the pump is GUARANTEED FOR THE LIFE OF THE UNIT. I easily spent more money on the crap OEM Carter pumps than the Air Dog costs.
Last edited by Dr. Evil; 02-24-2009 at 12:22 AM.
The following users liked this post:
Big Bill (02-23-2009)
#20
Dont forget about putting a FP guage in....you should also have a Pyrometer and boost guage as well - they will actually save you money and are a great help when troubleshooting.