I bought a volvo with the d11 engine and it has low power after 10 minutes of running. I bought the truck knowing it was this way and it has been deleted for a couple years by the previous owner. They have tried a different computer plus a couple sensors. Any help would be appreciated.
my guess is a bad delete. Depending on the flash, a lot of rogue deletes just delete the error codes related to the scr/dpf/egr with out charging the actual program. I would contact a few different companies and ask how they do there deletes and get your ecm reflashed to a non emission file rather then a modified file.
Then again, why was it deleted in the first place. Low compression, burning oil, worn injectors, bad temp sensor, turbo waste gate, split intercooler.
No error codes?
The truck doesn’t throw any error codes itself. I haven’t had it to a shop yet to put it on a scan tool. It ran with no problems for two years after the delete. I’m not sure why he deleted it.
Let's not keep mentioning the exhaust, just focus on the issue. Have you any way to measure fuel pressure at the cylinder head? Do you have a racor or diesel pro fuel filter on it? Can you measure fuel restriction? These will usually throw 128-96- xx. Doesn't mean it has to. Is your engine equipped with I-EGR? Let's start from scratch
It has a diesel pro filter. It has the externally cooled egr. They put a new fuel filter housing on it as well. I’ll have to get a new gauge to check the pressure my truck was stolen a couple years ago and that’s something I hadn’t replaced yet. Do you happen to know what fitting I need to check the pressure at the head. I don’t have a fuel restriction gauge but might be able to come up with one.
I usually just drill and tap the supply banjo screw and fit a test fitting to it, that way it's always there in the future. Should see minimum 65 psi. As a rule, I don't want to see more than 4" negative pressure going into the lift pump at idle. And not more than 6 full throttle full load.