First time in DPF truck, some questions.

I only have experience w/ a C-13 but it should be close.

When running, you don't notice a difference in performance, noise, anything. Starts and stops automatically. Usually takes between 30 minutes to an hour depending on how heavy the soot is in the DPF.

When idling, the engine revs up to 1400 rpms while the burn takes place. Try not to kill the burn process once it starts. It seems to mess everything up and the sensors get out of wack, then you have to pull over and do a manual regen.

JP

 

JP said it perfectly. Unless there is a problem, you won't notice a difference.

 

DPF do become plugged and have to be cleaned. Some can't be cleaned because they are too plugged. DPF do also crack, so it would be replaced. We have seen many systems so far do not survive disassembly too well. Since they are still exhaust parts they don't like to come apart after a couple of years and stuff starts to break.

 

Push the trip button three or four times. I learned this the hard way when I got impatient one time resetting my trip and it took a little while trying to figure out how to switch it back.

 

Now I'm wondering if that changed the temp from Celsius to Fahrenheit?

 

if you're loaded, the exhaust temps are going to be high enough to complete whats called a passive regeneration. this is where the engine ecm does not have to do anything for the regeneration process to take place. since the temps are high enough with ecm intervention, you will not notice any affect.

if you're bob tailing or unloaded, the temps won't be high enough on their own, therefore the ecm will get involved. to do this, it injects fuel into the exhaust stream. with the use of a diesel oxidation catalyst, it increases the exhaust temps to where it needs to be to perform a regen.

the only thing you need to remember as far as maintenance goes is every 300k miles, the dpf does need to be serviced. every time the aftertreatment undergoes a regen, soot is burned off, but ash will remain inside the filter. therefore cleaning is necessary. dpf's are also very sensitive to cracking. this is usually due to driver abuse. there is a required high exhaust temp light in the dash, locations vary on manufacturer , and when this lamp comes on, it is very important not to shut down the engine until the light goes off. without letting the aftertreatment cool down will cause damage to the system, like cracking the dpf.

 

When you have the DPF cleaned, make sure you find a shop that does it on-site. Most send it off to another shop because the cleaning equipment is very pricey. This causes 3 days of downtime. If you find a shop that does it on-site its about 6 hours.

 

BTW dont put the DEF in the fuel tank.