Call Davco and make sure you’re being sold the correct filter. I had that issue with one and was told absolutely they were selling me the correct filter, and it kept plugging up. Called Davco support and gave them the vin from truck and they gave me the correct filter part number for several different brands, none of which matched what I was being sold. Just because the filter fits in the housing, doesn’t mean it’s the right filter.
Way ahead of you. Already checked and they are the correct filter via pete, kenworth davco and a couple others.
Your truck may be too new for any of this but I was telling a Dr today about your filter issue He said they were having that same sort of issue when bio first started being used, said it was basically reacting with the fuel lines but he thinks any of the new rigs unless something was replaced should be bio safe Just a thought
Took a new ‘18 579/MX13, IL > ID. Didn’t get but a couple hundred miles away from the DC and a CEL popped up. Called the shop and they asked if it was derating. It wasn’t. They said to run it and if it derates, call them back. He said these new trucks are built with check engine lights turned on. Haha. Now, I’m in a ‘20 T680/MX13. I’ve not been in it long. The only thing I’ve had is an anomaly of the transmission (PACCAR) backshifting two gears on the 2nd stage of the engine brake, shooting the revs to 2100rpm, coming into a town. That popped a couple lights and a message telling me I needed to service the transmission. When I stopped at a stop sign, it made a loud racket, went into neutral, and stranded me. Turned off the key, went back to the car behind to alert him of what happened. He responded that it sounded like the truck ate it’s transmission. Haha. I get back in, start it up, it goes into gear, and has been perfect ever since. I’m at 126K on it. Independent of issues, I think, they’re the doggiest engines I’ve ever driven. The fuel curves are horribly soft, which is how I think they fuel mileage like they do. But, they’re very smooth and quiet, which is really nice to drive. They’ve made huge improvements in the engine > trans interface; they’re a way smoother operation than earlier models. Even so, three dealership personnel (parts and service) have told me they’d never buy a PACCAR and look at a Cummins, if I’m wanting to buy a truck. My employer’s family used to own the dealership and it’s right next door. Hopefully, there’s enough info being exchanged, on proper servicing, to where I don’t suffer a breakdown on the road.
Thats what i thought too at first hence why i changed out the lines. Figured either i somehow had old lines or that the last owner put cheap junk in then had the whole system scrubbed. Still eats filters like mad and the line change didnt really help.
Got me stumped I’ll keep asking around but from all you’ve done it seems you’ve checked all the right boxes
Just be glad Cat isn't still in the on-road game. You'd be begging for that $10k bill after a turbo failure.
The engine is fine. The emission system is where it really goes downhill. If you're smart you know what to do about this.
The fuel filter is not the engine, nor does it get dirty faster because of the engine you have. This is the silliest thing I have heard in awhile.
You bought some bad fuel somewhere. That didn’t turn black due to a Paccar engine issue. Even though, I agree, you couldn’t give me a truck with a Paccar engine in it. I’ve seen it first hand many time what this engines do. I haul for a carrier that has had a Paccar engine issue on every truck. There Acing them out one by one. From sensors to DEF issues. And they bought these trucks brand new.
