Regen Question

the computer wont regen if its not needed. when the DPF is full it will regen by itself(passive at 60+MPH) if it neeeds an active regen(you start it) it will le you know

 

Regens are activated if you stay over 45mph for at least 30. minutes. don't worry about performing a manual unless the yellow or red lights come on. (Is that listed on your visor?) doesn't always need a clean out cuz it depends optically on how much stop & go you are doing in a given week. More stop & go the more it will automatically start.. If you see the yellow lights come on get your speed up for 30min. sometime hard to do if you're in traffic. If your red light comes on stop! call for help! you can first. try it manually.. While driving, If you are loosing power/ derated/slowed down look for white smoke out of your stack then shut down asap.

 

Active regens require input from an operator (by that I mean the driver or a mechanic). The only ones that start by themselves are the passive (or rolling] regens. If they could do it by themselves, it would be dangerous because when you do one, you need to be in a safe place away from anything flammable...including what is under your truck. damutt was right on damoolah...you can push the button until your finger falls off...if the sensors in the DPF are telling the computer everything is normal, then a parked (active)regen won't initiate.

Besides...why would you want to do one anyway. All a regen is in reality is the computer injecting minute amounts of diesel into the exhaust at a high rpm (for exhaust temp) to burn away accumulated soot on the DPF membrane. If the computer isn't telling you that you need to do one, that means there isn't enough soot to worry about. Besides, it turns the soot to ash, and the ash stays in the DPF until it gets full and then they have to service the (expensive) DPF by removing it and force clean it at a shop and then 'bake' it at an extremely high temp to ensure that all the soot is gone.

If you have time, search youtube for 'servicing a DPF'...you'll see how involved it is to work on one.

 

If other readers are driving Internationals, normally, you only know if it's doing a passive regen if you stop (exhaust temp light) or if your DPF is getting close to needing a service (light smoke puffing out the stack) if the passive regen doesn't have time to complete and it still needs one done, sometimes you get a DPF light (yellow), if it doesn't start a regen by itself, then after a short period, the DPF light will start blinking and a warning buzzer goes off...if you don't stop and regen then, it will eventually derate and the little upside down triangle will come on...if you keep going then...it will eventually turn on the red engine and/or the red stop sign then shut down. I am not sure what the Paccar system does...never drove one of those.

 

depending on milage of the truck, you will be able to smell it it, has a very unique smell too it