Deleting the DPF?

weekendwarriorfsw32 · #1 (**permalink**) 07-03-2009, 12:03 AM

How long does it take to fill up the DPF? I am thinking about deleting the DPF on this because I don't want fill it up and have to replace a 3 grand part for nothing. Who makes a good kit to do it?
Thanks,
Nick

Brandon D · #2 (**permalink**) 07-03-2009, 02:31 AM

You shouldn't have to worry about filling up the DPF if the truck is running good and the DPF is working properly. That being said there are kits out there to replace the DPF, but you can't just take the DPF off without reprogramming the ECM. You need to buy a tuner and DPF delete pipe to get the job done right. I highly recommend Spartan but do some research on this site and you will see there are a few options. Good Luck

dt75flh · #3 (**permalink**) 07-03-2009, 03:15 AM

plus keep in mind if you live in Calif it wont pass the visual insp for emissions

origcharger · #4 (**permalink**) 07-03-2009, 08:59 AM

And it may effect your warranty.

weekendwarriorfsw32 · #5 (**permalink**) 07-03-2009, 09:36 AM

Well I think mine might be clogged because when I floor it from the line its a dog for about 2 seconds and I think that the turbos are not getting enough flow right off the line. When I have to smog it I will just throw it back on and I don't care about the warrantee because it does not have one I bought it used with 85,000 miles on it.

smotrs · #6 (**permalink**) 07-03-2009, 11:50 AM

Quote:

Originally Posted by dt75flh

plus keep in mind if you live in Calif it wont pass the visual insp for emissions

Which is no big deal if you plan to restore it to stock prior to any smog testing and warranty work. What is a big deal is whether they are going to do any road side visuals.

69cj · #7 (**permalink**) 07-03-2009, 06:33 PM

also an 08 with 85,000 miles is still under the engine 5 yr/100,000 mile factory warranty if it hasn't been voided.

Crazy001 · #8 (**permalink**) 07-03-2009, 08:20 PM

I honestly think your line of thinking is a bit off on this one.

If the DPF were clogged, you would certainly see a trouble code, as the back pressure sensors would detect a problem. I believe there is a light on your instrument panel that is supposed to come on to indicate the DPF needing service.

Also, if the DPF were clogged you wouldn't have the problems you're mentioning now. You'd be losing power at high-boost, high RPM range, as that's when the most exhaust is being forced through the DPF. This is also the point when the back pressure is the greatest, which would really rob you of power if it were truly clogged.

My '08 has 1200 miles on it, and has the exact same lag you do from a stop. I can floor it and the thing just sits there for a couple seconds until it decides to get moving. This is a PITA especially when making a turn with people coming at you...I think I have plenty of time until the darn thing doesn't want to move. Then I panic, hit the pedal harder just as the power comes on and I fishtail...

The engine produces the most soot when it's running rich, which happens when it dumps lots of fuel into the cylinders before the turbos supply the necessary boost to burn the fuel correctly. To avoid that from prematurely clogging the DPF the PCM won't let the injectors supply that much fuel until the boost is there.

It's NORMAL!

weekendwarriorfsw32 · #9 (**permalink**) 07-03-2009, 11:02 PM

Quote:

Originally Posted by Crazy001

I honestly think your line of thinking is a bit off on this one.

If the DPF were clogged, you would certainly see a trouble code, as the back pressure sensors would detect a problem. I believe there is a light on your instrument panel that is supposed to come on to indicate the DPF needing service.

Also, if the DPF were clogged you wouldn't have the problems you're mentioning now. You'd be losing power at high-boost, high RPM range, as that's when the most exhaust is being forced through the DPF. This is also the point when the back pressure is the greatest, which would really rob you of power if it were truly clogged.

My '08 has 1200 miles on it, and has the exact same lag you do from a stop. I can floor it and the thing just sits there for a couple seconds until it decides to get moving. This is a PITA especially when making a turn with people coming at you...I think I have plenty of time until the darn thing doesn't want to move. Then I panic, hit the pedal harder just as the power comes on and I fishtail...

The engine produces the most soot when it's running rich, which happens when it dumps lots of fuel into the cylinders before the turbos supply the necessary boost to burn the fuel correctly. To avoid that from prematurely clogging the DPF the PCM won't let the injectors supply that much fuel until the boost is there.

It's NORMAL!

Well also the main thing behind doing this is the MPG just SUCKS so I am doing this to gain some MPG.

smotrs · #10 (**permalink**) 07-04-2009, 02:15 AM

That's the main reason for doing it for sure.

gopedoligist · #11 (**permalink**) 07-06-2009, 02:54 PM

nick. first thins first. your dpf will never fill up. your truck goes into regen mode to clean it out so that it will never fill up. but if u want to do it for gas milage then go for it. u will need the dpf delete pipe and a tuner to reprogram the truck so it doesnt throw codes. several companies offer these pipes and tuners. spartan diesel, sct.. ect..... just make sure u dont drive it with out that tuner. otherwise your trucks sesors will see all the soot going by and keep your truck in constant regen. and u will be getting about 4mpg haha good luck buddy. also your problem doesnt sound like a dpf issue. more like a turbo or injector issue.

Crazy001 · #12 (**permalink**) 07-06-2009, 06:01 PM

Quote:

Originally Posted by gopedoligist

nick. first thins first. your dpf will never fill up. your truck goes into regen mode to clean it out so that it will never fill up.

Um..... need 10 characters to post....

Quote:

Originally Posted by 2008 6.4L Diesel Supplement

Filter service/maintenance
Over time a slight amount of ash will build up in the DPF which is not
removed during the regeneration process. The DPF may need to be
removed for ash cleaning at approximately 120,000 miles (193,000 km)
or greater (actual mileage can vary greatly depending upon
engine/vehicle operating conditions) and replaced with a new or
remanufactured (ash cleaned) part. The filter may need to be replaced
at approximately 250,000 miles (400,000 km) depending upon
engine/vehicle operating conditions. In both cases the engine control
system will set a service light to inform you to bring the vehicle
to the dealer for service.
If there are any issues with the oxidation catalyst/DPF system a service
light or will be set by the engine control system to inform
you to bring the vehicle into a dealership for service.

trfdfirefighter · #13 (**permalink**) 07-06-2009, 06:40 PM

there is no problem with your truck, until you put an intake or exhaust on there and even then they lag a lil bit. they are right you have to run a tuner when u delete dpf which you will like alot with the increased mpg, power, and it will get rid of the lag too.

Mustangtoby2001 · #14 (**permalink**) 07-06-2009, 08:08 PM

I have heard that the lag on takeoff has somthing to do with emissions, and if you get a tune you can get rid of the lag and gain some mileage, not to mention a bunch more power. I haven't tried myself, my PSD is a company truck, not mine personally.

Chief409 · #15 (**permalink**) 07-11-2009, 10:49 AM

My '09 6.4 has the same hesitation from a stop. I've put it down to turbo lag and the emissions controls. With the Smog goons here in CA, plus getting the Extended Warranty for the power train when I bought the truck, I'll just live with it.

With a 6.4, any visible smoke is enough reason for the CHP to check you out, or Joe Citizen to call the 1-800 smog number to report you.

Sad, but true.