Upgrades and Aftermarket - 6.0L EngineUpgrading and adding aftermarket equipment to your 2003-Up Super Duty or Excursion with 6.0L Power Stroke diesel engine. Please confine discussion of topics in this forum to those items that are specific to the 6.0L Power Stroke engine.
I wonder if I'm running lean (hard on the engine).
Installed a AFE PG7 stage2, and boost pressure increased 7-10 psi above stock for similar loads. And fuel economy dropped by 1-2 mpg. So, why is this? I commute with this truck 50 mi/day and pay close attention to the mpg.
Folks have posted that boost is controled by the EBP sensor, so more flow through engine, same back pressure = more boost pressure. My daily commute hasn't changed, I still set the cruise at 60 mph. But now I see 7-10 more psi than before. I'm going the same speed, same fuel amount, but more boost = lean? Am I damaging my engine?
Side note: my 2005 PSD does NOT have a MAF...a temp probe sit in its place.
A diesel is oppisie of a Ga$ A gas you hurt it when u run it lean but dont really hurt it running it rich and a diesel you cant hurt running lean but kill them running them to rich,
I got a question on this lean subject. Say you spray nitrous and burn the fuel compelety up and it is running leaner. Not a big big shot just to clear the extra raw fuel. But say your spray little more than needed nitrous, and with there not being much fuel in the cyclinder left. Will it damage or scratch the cyclinder walls? I thought maybe diesel also lubes motor? Can too much nitrous burn hole in piston? Any affects at all?
With just and AFE stage 2 air filter system your not going to lean your truck out. Thanks, Micah
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2004 CC Ford Powerstroke 4X4 6.0L
If you run a diesel to lean it shuts off it would be the same as the old IDI diesel's thats how they got shut off is by cutting the fuel, So NOS is fairly safe on a diesel.
the problem with nitrous and too much fuel is that the extra ox lets more fuel to burn. that is if you are injecting more fuel. this can raise combustion temps up to the blow up point. lean diesels just loose power, to rich and they blow black smoke. and yes, to much fuel can hurt the cylinders and rings. and over temp the turbo. i remeber back it the 60'2,,guys would over fuel their 260 cummins diesel. some of the old cab-overs where you could see the exhaust and turbo was a sight to see. the entire exhaust and turb would be glowing cherry red and a foot or two of flame would be coming out the exhust pipe. it got pretty expencive after the engine went to hell, but they were movin the freight!
Contact AFe. I don't kow if this is specificly the issue, but I understand they are working on a fix for '05's and a CEL which I'm surprised you're not getting, if it is indeed overboosting. Could be a DTC but it hasn't set the CEL yet.
__________________ 2004 EB Excursion, 4x4, 6.0, everything but step tubes and 2nd row chairs, Magnaflow Exhaust, Isspro Gauges in an under cubby pod, Fumoto sitting on V Codes and Revo 285's.
"Treat me good, I'll treat you better; treat me bad, I'll treat you worse." - Sonny Barger
It just doesn't make sense to be going the same speed on the same roads and see more boost pressure and decreased mpg.
I doubt I'll see a CEL on my 2005 with the AFE stage 2. Luckily or not, I don't have a MAF sensor. A temp sensor sits in its place. [img]/ubbthreads/images/graemlins/shrug.gif[/img]
I notticed in your sig that your egr plug fell off...and hince your problemo..(unless you plugged her back in)) the egr communicates with the ebp sensor and the pcm and the epa (ok that was a joke) but when not functioning properly you get defueling, (some get a cel i did not and i don't have a maf sensor either) and poor performance...plug it back in and after a couple days let us know whats up..the egr may need cleaned if it has been unpluged awhile...05 and newer pcm's do not tollerate the egr just being unplugged they are smarter then the 03-04 in this respect..I have the afe stage 2 and have seen perhaps 3 lb more boost but that is into the pedal real deep and normal driving my millage stayed very similar to a clean donaldson...
j.schall
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2005 f250 PSD 4x4,CC,LB Magnaflow 4" turbo back exhaust.
I had a Service writer once tell me the characteristic I was discussing could be an O2 sensor. I reminded him that they do not have O2 sensors. He then fell back to the point that it still could be running lean - I stopped conversing with him on the topic after that.
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2004 White F350 XLT, CC, SB, 4x4, 6.0L Auto, 3.73LS, Camper Pkg, Skid Pkg, Edge 2" Mini Spring Pack, Bilsteins, MBRP Exhaust, FluidAmpr, Elite Regulated Return (55 psi), Airdog, Weld Evo Velociti & LT285/75-16
Built: 11/03/03
With the EGR unplugged the Exhaust backpressure table changes which affects the boost. That is most likely why your boost is higher.
Tadd
__________________ Elite Diesel Custom Tuning www.elitedieseleng.com tadd@elite-diesel.com 1-866-631-8518
Elite Diesel SCT Tuning for 6.0 and 7.3's with Cylinder Pressure Adjusted tunes, Programmers or 6-position chips, Custom 6.0 Injectors, 2 Stages of 6.0L Fuel Systems, H-11 Head Studs, Fire Ring Kits, Single and Compound Turbos for the 6.0L, Engine Internals
04 F350 XLT SPORT CC DRW
Elite Diesel SCT Tuner,AFE Stage 2, 345cc Injectors, 6" Stacks, S400 turbo. 701hp on #2
Look in the september issue of Diesel Power Mag.
Ford Senior Master Technician
the plug somehow vibrated bake on my egr and i made two 340 mile round trip runs with my stuff to my new home. lots of hills and mountais towing about 6000 lbs. i didnt see any difference. it did make that plug jump off the egr. is it trying to tell me something?
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