6.7 Fuel Rail Pressure Drop with Hot Tunes

BK39 · Feb 10, 2015

Buck1 said:
Yes sir. Stock lift pump has 210k on it. I was telling a guy how well it was doing as he is getting ready for number 3 on his 2014, so I probably jinxed myself.

This is good to know. Mine did it the other day getting on the freeway, 0-80mph. Blah, just died. And I only have 11k on my truck. Guess it has a weak pump.

MorganM · Feb 10, 2015

Have you noticed the pump making any more noise than usual?

BK39 · Feb 10, 2015

Me or Buck1?

Me, no. I have not noticed it making any noises.

MorganM · Feb 10, 2015

BK39 said:
Me or Buck1?

Me, no. I have not noticed it making any noises.

Both!

I've read where they begin to groan so was anticipating that would be a symptom of failure.

BK39 · Feb 10, 2015

MorganM said:
Both!

I've read where they begin to groan so was anticipating that would be a symptom of failure.

I'll pay more attention to it now that I know what it is.

Buck1 · Feb 11, 2015

No extra noise on mine. I did just change the filters. But I was thinking the same thing. Never happened before, but maybe I was taxing it more than usual. So the question is low pressure or upgrade high pressure?

Powerstroke_fan · Feb 11, 2015

We need to get our hands on one of morgans stroker pumps matt as soon as they come out. Ive been debating on putting a new stock lift pump on at the same time.

dseitler · Feb 11, 2015

When I started this thread it was in reference to a drop in rail pressure not supply pump pressure. The code you are referring to is a drop in rail pressure where your CP4 cannot supply enough fuel to maintain the rail commanded. Pulling up hill is a perfect example where you can run your CP4 out and not supply your fuel rail with enough fuel to maintain pressure and it will shut off. LPFP will send a different code if it does not supply enough pressure.

Buck1 · Feb 12, 2015

dseitler said:
When I started this thread it was in reference to a drop in rail pressure not supply pump pressure. The code you are referring to is a drop in rail pressure where your CP4 cannot supply enough fuel to maintain the rail commanded. Pulling up hill is a perfect example where you can run your CP4 out and not supply your fuel rail with enough fuel to maintain pressure and it will shut off. LPFP will send a different code if it does not supply enough pressure.

10-4. Thank ya sir!

Buck1 · Feb 12, 2015

Powerstroke_fan said:
We need to get our hands on one of morgans stroker pumps matt as soon as they come out. Ive been debating on putting a new stock lift pump on at the same time.

I agree.

Morgan what is the word on ETA for them?

HS-MotorsportsDallas · Feb 12, 2015

dseitler,

We're glad that the pumps cured your issue you were having. As Zane said, this kit works excellent on stock or modified trucks.

MadDiesel73 · Feb 17, 2015

at what power level do we have to get concerned with the lpfp system? if running a dual hpfp .

bigrpowr · Feb 17, 2015

MadDiesel73 said:
at what power level do we have to get concerned with the lpfp system? if running a dual hpfp .

pretty much immediately.

Powerstroke_fan · Feb 18, 2015

So I shouldn't run dual fuelers with a stock lpfp?

HS-MotorsportsDallas · Feb 18, 2015

I wouldn't run a dual fueler without a lift pump. The stock lift pump struggles with tuning alone on some trucks. I would suggest doing a lpfp at the same time.