6.4L Power Stroke Engine and DrivetrainDiscussion of the 6.4L Power Stroke diesel engine and drivetrain in the 2008 Super-Duty trucks. No gas engine discussion allowed except on transmissions and drivetrain that pertain to all models. Please confine discussion of topics in this forum to those items that are specific to the 6.4L Power Stroke engine.
ISSUE:
2008 F-Super Duty vehicles equipped with the 6.4L diesel engine are equipped with an oxidation catalytic converter (OC) and diesel particulate filter (DPF). The function and operation of these parts may cause some customers to perceive an issue with their vehicle.
ACTION:
Review the Operating Characteristics with the customer.
OPERATING CHARACTERISTICS
Diesel particulates in the exhaust are trapped by the DPF. Regeneration is the process by which exhaust temperatures are increased so the particulates are combusted.
The frequency and length of regeneration will fluctuate as both are determined by the drive cycle. For most drive conditions, regeneration frequency will vary from 100 - 600 miles (161 - 804 Km) between occurrence and last from 10 to 40 minutes. The first regeneration does not require 100 miles (161 Km) and may occur at any time. The length of regeneration is usually reduced if a constant speed above 30 MPH (48 Km/h) is maintained.
The following is a list of normal operation while the vehicle is in regeneration, and do not require repair. If you are not sure if the vehicle is in regeneration, IDS can be used to monitor the Diesel Particulate Filter (DPF) PID.
Engine idle speed can be 1100 to 1200 RPM in park/neutral with foot off brake.
High idle speed drops to within 50 RPM of normal idle when the brake pedal is touched, PRNDL is actuated, or clutch is actuated.
White smoke in cold ambients is normal and the amount will be increased during regeneration.
Powertrain power is limited to 325 horsepower (HP).
Engine responsiveness may be slightly different than normal operation.
During initiation of regeneration, exhaust smell may be noticed - especially on new vehicles.
Powertrain sound will be different including air induction noise (including flutter on deceleration or engine shut down), exhaust noise, and changes in engine radiated noise.
During regeneration, exhaust temperatures are elevated.
The following is also normal and may be observed by a technician using a diagnostic tool. It is not likely that a customer would be aware of these:
The throttle body is only active during the regeneration process and during shutdown.
EGR is not operating during regeneration.
Yeah, but the 64 thousand dollar question is: Did you shoot flames out your tailpipe? [img]/ubbthreads/images/graemlins/blush.gif[/img]
short_stuff
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I think my butt just did a regen? smells funny, hot....everything you just stated. LOL
I couldnt help myself LOL [img]/ubbthreads/images/graemlins/biggrin.gif[/img]
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In this case you may want to roll up the windows, it may smell better.
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2003 F-350 Lariat CC/6.0L Diesel/TorqShift/3.73/FX4/SRW/Dark Shadow Gray.
Born on date: Jan 20, 2003
Mileage Record
Latest Oil Report
Number of reflashes done: 2 (05E15 Jan 8, 2007)
Number of C94 injectors replaced: 0
Number of times the EGR valve has been replaced/cleaned: 0
Thanks for posting that. I have 1100 miles on my truck and have gone through 4 regens. I was worried that something may be wrong. No flames but the regen exhaust is extremely hot. I really want to get a thermometer to measure it just to see how hot is gets. I did hold a piece of newspaper near it and it would not light. Probably not a good idea but I just had to see for myself.
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2008 F-350 - 6.4l - CC - SRW - FX4 - Nav System - 20" wheels - Amp Research Folding Running Boards
towing a 2006 Rage'n SS2400
loaded with '06 KFX400, '06 Wolverine 450 4x4, '06 TRX90, '05 Falcon 110 and an '06 klx110
Ours just did its first regen at 200 miles. It started with a loping idle at a stop light before I pulled into the bank. Once stopped and put into park, idle went up to 1100 and sat there for a few minutes. Anyone else notice a pretty big gain in power afterwards? The truck seems SO much better to drive now.
If it does the regen based on backpressure readings (taking high backpressure as an indication that too much soot has built up and it's time to burn it off) then I would indeed expect a renewed sense of power after a regen...
Duncan
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Ours just did its first regen at 200 miles. It started with a loping idle at a stop light before I pulled into the bank. Once stopped and put into park, idle went up to 1100 and sat there for a few minutes. Anyone else notice a pretty big gain in power afterwards? The truck seems SO much better to drive now.
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So was it running weird? You said it had a loping idle, did it sound messed up, could bystanders have noticed it also or was it pretty low key? Did you have to modify the way you were driving at all when it started.
Truthfully, the truck has felt like a dog since day one. After the regen, it was completely different. The throttle is very responsive now and is great to drive. Still dont like the shifting, especially 2-3.
The regen was pretty low key. I dont think anyone would have noticed it, it didnt want to pull away from the brakes or anything like that, but was definatly jumping around 100 rpms or so. Putting it in park, it jumped up to 1100 and sat there. I didnt have time to wait for it to stop so I shut it down. When I did this, the turbos barked a few times similar to a large single when you are on it hard and let out. When I got back in and fired it up, it was normal, then elevated again shorty after. It then went away a minute or so later. I was suprised to have a regen after only 200 miles. Makes me wonder what will happen when more fuel is introduced.......
With around 300 miles on the new truck, it was being doggy and sucking fuel pulling my enclosed trailer on a 100 mile trip out of town. I put it down to headwinds, hills etc on the country highways we were on. I did notice that hot exhaust smell when we would stop. On the return trip the next day on interstates, mileage jumped up 2-3mpg, and power felt better, so it could have been going through the regen while driving. The part about hp being limited to 325 feels likely.
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I wonder how much extra fuel gets burned during a regen if it take 10 to 40 mins to complete. It also seems that it's going to do a regen for every tank of fuel used. That sure doesn't seem fuel efficient to me.
clogged filter ... Lose miles... Regen... burn extra fuel. If I had to guess, the over head mileage is going to be way off when you figure in a clogged DPF and a regen cycle.
so after all these threads I must have missed the purpose od the DPF. Why are particulates bad in the air? wouldn't burning them off of the DPF filter just turn them into gasses, which I would guess are more harmful? And why would the EPA get involved in black smoke that can't be much more harmful than the gasses released when burning that soot.
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so after all these threads I must have missed the purpose od the DPF. Why are particulates bad in the air? wouldn't burning them off of the DPF filter just turn them into gasses, which I would guess are more harmful? And why would the EPA get involved in black smoke that can't be much more harmful than the gasses released when burning that soot.
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Particulate matter [soot] is a known carcinogen [lung cancer, etc.] The wrong size particles lodge in your lungs and cause typical respiratory ailments. You do NOT want to breath in a lot of unfiltered diesel exhaust.
Soot particles are primarily Carbon - burning them completely produces CO2 [Carbon Dioxide] which is not a 'pollutant' but is suspected as a 'Greenhouse Gas.' Breathing in CO2 will not cause health effects unless you get so much that you asphyxiate yourself from lack of oxygen. CO [Carbon Monoxide] WILL kill you in pretty mild concentrations and is in fact EPA regulated on all cars and trucks. The catalysts on your diesel truck do a great job eliminating almost 100% of CO.
So - DPFs do in fact make the exhaust a lot cleaner. The black 'smoke' you used to see is really a big cloud of tiny black particles waiting to be breathed into your lungs.
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