Tonyrodz
Resident Resident
Yes, that's where my filter is--around.
Tuning file installation
- Thread starter Sam Harris
- Start date
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I thought on 03 they went inside the tank. Well @Sam Harris thats where you should start- see if you have an external fuel filter and if so, replace it.
George B
¯\_(ツ)_/¯
Fuel filter is on the frame under the driver floor. The fuel pressure regulator is in the rail on the left bank and could also be contributing.
Dantheman1540
Full Access Member
That's a bummer fuel pumps are never the most fun thing to swap. There is a company that makes a full direct drop in bucket with upgraded pumps if you feel the need to do so.
The link is to the dodge version but they offer one for GM trucks and SUVs as well. This will be my choice when the time comes, but if you do forsee big power then I see no need.
https://m.facebook.com/story.php?story_fbid=3759780300730199&id=155752837799648
The link is to the dodge version but they offer one for GM trucks and SUVs as well. This will be my choice when the time comes, but if you do forsee big power then I see no need.
https://m.facebook.com/story.php?story_fbid=3759780300730199&id=155752837799648
OP
OP
I do. This was replaced about 7k miles ago.
I would still replace it and the FPR too since it’s under the hood like George said. Mine had an issue at one point and I was able to buy a rebuild kit but I don’t remember how I found that.
George B
¯\_(ツ)_/¯
@Sam Harris Is your truck a flex fuel?
OP
OP
Yessir
OP
OP
That’s cool. Good to start with them i suppose, then do the pump if necessary. Looks like this is the one:
ACDelco 217-3073 GM Original Equipment Fuel Injection Pressure Regulator Kit with Clip and Snap Ring https://www.amazon.com/dp/B000NW4PXI/ref=cm_sw_r_cp_api_i_gEO3Eb4KZMPP2
George B
¯\_(ツ)_/¯
So your fuel pressure will be around 42 PSI while idling and jump to 45 off idle.
George B
¯\_(ツ)_/¯
I left this out of my last post.
What does BlackBear expect for fuel pressure? You may want a different regulator for a non flex? That pressure is higher.
What does BlackBear expect for fuel pressure? You may want a different regulator for a non flex? That pressure is higher.
OP
OP
Not sure. I haven’t heard back for a bit. I know they’re really busy. I’m going to see where it’s at, and go from there. I’ll plan to replace the filter and regulator. And see where it’s at after that (unless it’s reporting correct pressure anyway)
NBS Flex, KOEO (Key On, Engine Off) fuel pressure spec for V8s is 48-54 psi.
OP
OP
Hmm. I thought it was supposed to be around 50+. Guess I need to look it up.
George B
¯\_(ツ)_/¯
My 2003 flex would do 52 KOEO and 42 Idling with a jump to 45 off idle.
They look at injector data. Notice he said “might have a fuel pressure issue” since it’s leaning out. Duty cycle is probably nearing 100% at WOT which means the injectors are staying open as long as possible in order to get enough fuel through. I had that issue with my 12613412 injectors rated at 50lb/ hr but I have a blower and switched to a smaller pulley. At that point I was at the limit of my pump and MAF as well.
George B
¯\_(ツ)_/¯
Did I say something incorrect or are you adding to my post?
You asked what they were looking for fuel pressure so I was just stating they probably weren’t looking at pressure but duty cycle. So they’re probably guessing it’s pressure and couldn’t tell him a specific FP number if that makes sense.
George B
¯\_(ツ)_/¯
Got it.
