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  #1  
Old 06-20-2011, 07:50 PM
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What is The DPF

I'm currently looking at a 6.4 F250 and when I'm reading up on it, on this forum, I keep running into this DPF acronym.

So I guess i need to be schooled in
- what is DPF?
- what is involved in "deleting" it (cost, labor)?
- does it pass inspection with out it?
- how much does it help/hurt the 6.4 with/without it?

Thank you for your time
Jeremy
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Old 06-20-2011, 08:14 PM
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DPF is an acronym for diesel particulate filter. Essentially, it works by dumping raw diesel fuel into your exhaust and super heating it in order to burn the bad particles that are a byproduct of driving a vehicle. Therefore, this results in very poor fuel mileage while you're going through a regen/DPF cleaning/whatever else you want to call it. Deleting it requires a tuner/programmer and a delete exhaust pipe at the very minimum. Many people also take this opportunity to add a cold air intake. It all comes down to how much you want to spend. You can do a full exhaust, tuner, and cold air intake and pay upwards of $2000 depending on what you get just for parts. Progammers run about $1000 depending on brand and delete pipes $300. You can shop around though and find better prices too. Labor rate will depend on the shop's hourly rate which varies so shop around. It takes a few hours to install. Unfortunately, you will not pass emissions inspection with the DPF deleted. However, there are some people who will put their trucks back to stock for emissions testing and then re-install the deletes. The deletes will definitely improve fuel mileage and you'll gain some HP and torque. Downside is that many dealerships will void your warranty for operating outside of the manufacturer's parameters. It all depends on if you want to spend the money and how important a warranty is to you compared to better fuel economy and more horsepower and torque.
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Old 06-21-2011, 06:58 AM
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Alberta appears to have covered your questions. But I'll expand on a few things.

Regarding what's involved: The removal and install of the pipe takes approximately 45min according to users who have done it. Another guy asked a shop about it and they quoted him like 8hrs if I recall. It definitely does not require 8 hours. So if your able to do it in your drive or garage, that will be your best bet.

Regarding inspections: Although some tuners can tune the vehicle so that it doesn't produce large amounts of soot that the DPF is there to catch. The fact is you will fail the visual portion of the inspection no matter how clean your vehicle is running. If the DPF is not in place, it's an automatic fail.

Regarding help/hurt: Overall, removing the DPF will benefit the truck as you remove the regen function which injects fuel on the exhaust stroke. This is a problem because with the latest Ford Flashes, it's possible to not know your vehicle is in regen when you turn it off. When this happens, the fuel still in the cylinders will end up draining down to the oil pan as the rings cool off. Not only does this dilute the oil in your pan but also removes the oil in the cylinder resulting in a metal-to-metal reaction next time you start the vehicle.

If you do know your vehicle is in regen, there are two things you can do to prevent the above as much as possible. The first is to continue driving until the regen function is complete. This wastes time and fuel in my opinion. The second is to just drive to your destination, put it in park and let the truck idle for a few minutes as it cools down. Putting it in park disables the regen function and letting it idle will allow it to burn off all the fuel that may have been injected on the exhaust stroke.

Alberta already touched on the warranty aspect of deleting your DPF, so no need to elaborate on that. However, even tuners that are DPF friendly i.e. designed to leave the DPF in place can void your warranty. So if you need to pay a visit to your dealer, remember to revert back to stock.
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Old 06-21-2011, 09:27 AM
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This may help.

What is a DPF Delete?
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Old 06-21-2011, 02:38 PM
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Thanks for the info guys I'm going to search for a write up to see exactly whats involved in taking the DPF in and out so i can get it inspected and warranty work done on it. or is there other way to get around the inspection and warranty issue?
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Old 06-21-2011, 02:56 PM
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dpf can be removed and the delete pipe installed in less than an hour with 2 people laying underneath the truck, i have done it several times
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Old 08-23-2012, 07:25 PM
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Quote:
Originally Posted by ThirdCoastStroker View Post
dpf can be removed and the delete pipe installed in less than an hour with 2 people laying underneath the truck, i have done it several times
I know this is a super old thread but I was doing some searching about dpf's and came across this which matches my question pretty close.

You say that you can swap out the delete pipe in less than an hour but can you explain what this involves? Is it a bolt on thing or cutting and welding pipe. I obviously don't know anything about exhaust and my n00bness is showing. Thanks.
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Old 08-23-2012, 07:29 PM
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2 bolts on the downpipe side, 1 on the tail pipe side, I think 3 electronic plugs to undo, and 4 rubber hangars. Then simply bolt in the replacement pipe and done
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Old 08-23-2012, 07:45 PM
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Damn that sound pretty easy, thanks for the info.
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Old 08-24-2012, 05:26 AM
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Ya this is kinda an old thread! DPF delete is easy. Especially compared to the EGR delete. But 2 people is highly suggested. That's thing is not light.

Also I noticed originally everyone telling TXFF about emissions checks... Texas doesn't emission check Diesels. It's a great state! lol


Sent from a phone smarter than me.
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