Dieseljunkie
New member
No not yet unfortunately. I haven't had the chance to mess with it again. I did do an oil change and put new fuel filters on this weekend just to rule that variable out. And they didn't change anything
6.4 pump installed, fuel pressure still drops?
- Thread starter Dieseljunkie
- Start date
No not yet unfortunately. I haven't had the chance to mess with it again. I did do an oil change and put new fuel filters on this weekend just to rule that variable out. And they didn't change anything
MorganY
New member
Replace the 6.0 HFCM. It's on its way out
Strictly Diesel
Active member
I disagree...why spend money on a pump when you can diagnose it for free?
If we're going to go that route, lets just suggest a big aftermarket pump. Stick a Fuelab in there, it will flow enough to cover up any other problems that might be causing the pressure drop issue. Great if you are selling the pump...not so great if its your wallet that has to pay for it.
Point is simple...it might be the pump...it might not. If you have money to burn, buy a pump. If not, take the time to determine where the real issue lies.
Fat fingered on my iPad...not responsible for typos!
If we're going to go that route, lets just suggest a big aftermarket pump. Stick a Fuelab in there, it will flow enough to cover up any other problems that might be causing the pressure drop issue. Great if you are selling the pump...not so great if its your wallet that has to pay for it.
Point is simple...it might be the pump...it might not. If you have money to burn, buy a pump. If not, take the time to determine where the real issue lies.
Fat fingered on my iPad...not responsible for typos!
Dieseljunkie
New member
Im going to try to test it this weekend. But if it turns out to be the pump...why not just replace the actual pump itself? Just out of curiosity and I am a college student on a tight budget at the moment. Just buying the pump would save me $100-200 compared to buying a new hfcm. But Im not stuck on gpoing that route if that be the case.
Agreed. Follow the suggestion given by Stricly Diesel, then if it needs replacement just do the pump. Make sure to clean the HFCM thoroughly as well.
Dieseljunkie
New member
Well it turned out to be the pump. I had the return line clamped shut on the last test run I did and pressure still dropped to 40psi at WOT.
Strictly Diesel
Active member
So did a new pump fix the problem, or have you not replaced it yet?
Dieseljunkie
New member
Haven't replaced it yet, planning on ordering one soon though.
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