Fuel Filter Mod screwup??
Lead Driver
Joined: Jun 2003
Posts: 8,298
Likes: 25
From: Damon (South East Texas)
To be honest with you, through some careful thought and research it's my opinion that this mod lowers the fuel pressure unless you're up there or at WOT. I didn't need a fuel pressure guage to figure that out either. It seems the fuel port plugs that our dear friend Bill suggested we drill out, plays a role in maintaining the fuel pressure at the bowl and to the injectors. If you had a regulated return, a better fpr spring, or some other way of increasing the pressure this mod probably wouldn't be a problem for you.
As far as fuel economy, that tanked even with my SCT. According to the overhead liar (which is surprisingly accurate on my truck) I normally average 19mpg+ on the freeway and about 16.5mpg-17mpg give or take around town. The overhead liar said I went to 16.4mpg on the freeway and about 13-14mpg in town.
At WOT I had all the passing power I needed and then some, but driving around town, I had to mash the pedal more for the truck to follow it's normal shift pattern. It's almost as if my truck were saying: "push the pedal further, I need more fuel".
After I put it back the way it was last night, my truck is it's normal self again. Now all I have to do is "tip' the accelerator and it goes.
The long and short of it, your regulated return system has a way of increasing or decreasing the pressure; as long as it can do that, it's worth a shot. My advice: try the regulated return first before drilling out the fuel port plugs.
As far as fuel economy, that tanked even with my SCT. According to the overhead liar (which is surprisingly accurate on my truck) I normally average 19mpg+ on the freeway and about 16.5mpg-17mpg give or take around town. The overhead liar said I went to 16.4mpg on the freeway and about 13-14mpg in town.
At WOT I had all the passing power I needed and then some, but driving around town, I had to mash the pedal more for the truck to follow it's normal shift pattern. It's almost as if my truck were saying: "push the pedal further, I need more fuel".
After I put it back the way it was last night, my truck is it's normal self again. Now all I have to do is "tip' the accelerator and it goes.
The long and short of it, your regulated return system has a way of increasing or decreasing the pressure; as long as it can do that, it's worth a shot. My advice: try the regulated return first before drilling out the fuel port plugs.
Fleet Mechanic
Joined: Dec 2007
Posts: 1,766
Likes: 8
From: Hutchinson, KS
To be honest with you, through some careful thought and research it's my opinion that this mod lowers the fuel pressure unless you're up there or at WOT. I didn't need a fuel pressure guage to figure that out either. It seems the fuel port plugs that our dear friend Bill suggested we drill out, plays a role in maintaining the fuel pressure at the bowl and to the injectors. If you had a regulated return, a better fpr spring, or some other way of increasing the pressure this mod probably wouldn't be a problem for you.
As far as fuel economy, that tanked even with my SCT. According to the overhead liar (which is surprisingly accurate on my truck) I normally average 19mpg+ on the freeway and about 16.5mpg-17mpg give or take around town. The overhead liar said I went to 16.4mpg on the freeway and about 13-14mpg in town.
At WOT I had all the passing power I needed and then some, but driving around town, I had to mash the pedal more for the truck to follow it's normal shift pattern. It's almost as if my truck were saying: "push the pedal further, I need more fuel".
After I put it back the way it was last night, my truck is it's normal self again. Now all I have to do is "tip' the accelerator and it goes.
The long and short of it, your regulated return system has a way of increasing or decreasing the pressure; as long as it can do that, it's worth a shot. My advice: try the regulated return first before drilling out the fuel port plugs.
As far as fuel economy, that tanked even with my SCT. According to the overhead liar (which is surprisingly accurate on my truck) I normally average 19mpg+ on the freeway and about 16.5mpg-17mpg give or take around town. The overhead liar said I went to 16.4mpg on the freeway and about 13-14mpg in town.
At WOT I had all the passing power I needed and then some, but driving around town, I had to mash the pedal more for the truck to follow it's normal shift pattern. It's almost as if my truck were saying: "push the pedal further, I need more fuel".
After I put it back the way it was last night, my truck is it's normal self again. Now all I have to do is "tip' the accelerator and it goes.
The long and short of it, your regulated return system has a way of increasing or decreasing the pressure; as long as it can do that, it's worth a shot. My advice: try the regulated return first before drilling out the fuel port plugs.
I hadn't heard of it either till the video and hadn't heard of anyone actually doing it until yesterday. There's a good possibility without any way to regulate the pressure other than stock that the same thing would happen as stated above.
Fleet Mechanic
Joined: Dec 2007
Posts: 1,766
Likes: 8
From: Hutchinson, KS
BTW- I watched the pmr video this morning and you're right Pocket. Not comparing apples to apples when talking about pmr's and definately opinionated instead of factual.
Also watched the video where he's putting a WW on a turbo still on the truck. After he gets the housing off, he's talking about the oil blowby and says something like, "Oh, that's just the blowby from the engine, not bad for a 720,000 (ish) motor." I'm thinking YEAH RIGHT! And you're just now replacing the compressor wheel with nothing else done to the turbo?!?!?
Also watched the video where he's putting a WW on a turbo still on the truck. After he gets the housing off, he's talking about the oil blowby and says something like, "Oh, that's just the blowby from the engine, not bad for a 720,000 (ish) motor." I'm thinking YEAH RIGHT! And you're just now replacing the compressor wheel with nothing else done to the turbo?!?!?
Hotshot
Joined: Jul 2003
Posts: 12,177
Likes: 40
From: Newport, WA
)
FTE Leadership Emeritus
Joined: Sep 2003
Posts: 12,269
Likes: 773
From: Houston, Texas
When I got on the freeway my truck just kept pulling and pulling along giving great mileage at the same time. This was in the face of a fierce headwind too!
Without the headwind headed north bound, it pulled right up an over-pass without using much of the turbo or much effort.
So whether or not you have a chip, exhuast, or whatever mods, it's worth it.
Posting Guru
Joined: Sep 2007
Posts: 2,121
Likes: 0
From: Knoxville, TN
I watched that too and I thought it was funny that he said you do not need forged rods unless you going to be drag racing and that pmrs are ok for "everyday driving around town." Who ever said that they weren't?
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Fleet Mechanic
Joined: Dec 2007
Posts: 1,766
Likes: 8
From: Hutchinson, KS
I have a 2002 7.3 F250 changed the fuel filter and also took out the plunger thing to get more fuel etc..re-installed the heater element looked fine was very careful not to bend anthing,,,ran fine on the plug but when i parked it at work (not plugged in) it would not start. after a awhile it did..I went and added some diesel additive ,,this am started up fine. after i had first installed the fuel filter and turn key on waited then started the truck i could smell something like burning not smoke but like wires( I thought maybe since the fuel bowl was not filled all the it was just the heater element) ...havent smelled it since ...now my question did i burn out that element somehow?? would my truck run rough all the time if it was fried? should I put back that plunger inside the fuel bowl? is there another potential problem if my truck has a hard time starting not on the plug??
I'm thinking that when I drained the bowl and then closed the drain valve, it didn't seal completely and was seeping out when it wasn't pressurized. Then the other day I was under the front of the truck and noticed that my crossmember, tie rod, and the block below the drain tube were damp as if fluid had been covering them.
So... after all this
you might check to make sure your drain valve is closed properly and it's not just bleeding the fuel pressure off when the truck is parked.My thoughts exactly!!!!
Post Fiend
Joined: Jun 2004
Posts: 9,293
Likes: 10
From: Parker, CO
My opinion is that if you plan to modify the bowl, just delete it altogether. I'm wishing I got rid of mine.
Fleet Mechanic
Joined: Dec 2007
Posts: 1,766
Likes: 8
From: Hutchinson, KS
Well, I'm with Toreador on the drilling of the ports. And I also know why the powerstrokehelp guy only drilled out one set of the holes and not both. I'll be replacing one of mine as well!! I thought Id just drill out both sets of holes, but it weakens the area so much that it actually bent the body of the port when the drill caught. So that one is ruined. and I'll be getting that replaced before I finish it.
I definately say that the drilling of the ports is a complete waste of time for our trucks. At least is was for me cause of the setback in time and having to replace one of them.
I definately say that the drilling of the ports is a complete waste of time for our trucks. At least is was for me cause of the setback in time and having to replace one of them.