DD15....wtf??

ok .
go to Detroit diesel dealer, not freightliner, and update software's in mcm, cpc and acm. ask them to check fuel mapping numbers are correct for that engine. Ask them to run doc face cleaning procedure. When doc face is partially clogged engine is flat and unresponsive. I would connect the DL soft and run it under load. The boost pressure value, fuel pressure value, doc inlet pressure value would show something.
Addition: full of ash DPFs also will make engine unresponsive

 

if you can get it to Pittsburgh Power, that might help. I don’t know the history of the truck. They can do some ECM programming as well as a Diesel Force cleaning. You can look at the diesel Force website, they also have shops in CA that can do that service. It’s really cool.

 

You’ve mentioned that it had right at 500k miles. Depending on the service it was in before you. It could be ready for an overhead and DPF replacement. If the last DPF filters installed where just a poorly done bake and blow, then they could be already full, but the ash accumulator shows 80%.

My company’s policy is DPF’s every 250k and overhead valve adjustments on every odd #00,000mile.

 

Make sure you get a good guy to make your overhead adjustments. I’ve seen a bad overhead make it look like it needed a set of injectors because the idle speed balance was off, the computer was still compensating for it, but the amount it had to compensate looked bad.

Also, when they do the DPF’s make sure they blow and vacuum the DOC. And get at least the Detroit reman DPF’s. Even if they aren’t the most “economical choice”. At least you’ll know what you’ve got.

Frontal crash detection would definitely make your truck “feel” gutless. Because the computer is backing off the throttle for you to keep you the same distance away from the vehicle ahead of you. But if you are losing more speed than that vehicle, then it’s probably not the whole issue.

 

injectors are not adjustable on DD15

 

You right, I had alittle bleed over from the old 60 series. But other than that, the statement stands. I’ve adjusted the post accordingly.