Truck has what I consider less than stellar performance. It smokes the freeway at night pulling a mild grade. It will smoke a lot accelerating in first gear, especially if I have had it idling for 10 minutes. It does burn oil. Say a quart in 500 miles. The exhaust does smell oily.
Just checked my fuel pressure at the schrader valve. It is running about 2.5 to 3.5 PSI. I don't have bubbles when it is idling but I do get them when I throttle up and let off the throttle.
It has a new air filter. Does the same with the air filter housing removed. It has a new fuel filter. Timing on the fuel pump was retarded. I advanced it and when I checked it with my Ferret, it was at 10.9 degrees. This did improve performance.
Truck starts immediately. One time, during a warm start, it stumbled and took maybe 5 seconds of cranking to get it started. That was after a couple hours of sitting. It has never repeated that.
Truck idles smooth as can be. On my actron timing light, it is a steady 660 RPM. Cracking any injection line will drop it to 640 or 650 RPMs.
When accelerating, it feels like a gasser running on 7 cylinders. There's a little bit of that vibration feeling you get when a gasser is missing. Maybe I am imagining that.
I changed the injectors out with some rebuilt Uhaul injectors. There was definitely a very wet injector with the old ones, they had gray paint so I expect it was time to change them at 140k miles. All return lines and caps were replaced. Olive for the return line was replaced. Exhaust quit having that burn your eyes with raw diesel going on after the injectors were changed.
Compression was taken cold. All cylinders were at 440 to 455 except one was at 475.
It seems to me like there is an excessive amount of oil in the intake. I will likely change the CDR since it appears to be original.
To recap:
Newly installed rebuilt injectors. New return line kit. New air and fuel filter. Lift pump pressure seems low to me. Burns oil. Smokes grey/white on acceleration. Compression is good.
I do have a Uhaul rebuilt IP sitting on the shelf.
My thoughts were to replace the IP prior to seeing what the fuel pressure was. Now I'm wondering if the fuel pressure is giving me grief and if I should replace the lift pump? Or screw it. Start at the grill and work my way back to the tail pipe replacing everything on the way.
Just checked my fuel pressure at the schrader valve. It is running about 2.5 to 3.5 PSI. I don't have bubbles when it is idling but I do get them when I throttle up and let off the throttle.
It has a new air filter. Does the same with the air filter housing removed. It has a new fuel filter. Timing on the fuel pump was retarded. I advanced it and when I checked it with my Ferret, it was at 10.9 degrees. This did improve performance.
Truck starts immediately. One time, during a warm start, it stumbled and took maybe 5 seconds of cranking to get it started. That was after a couple hours of sitting. It has never repeated that.
Truck idles smooth as can be. On my actron timing light, it is a steady 660 RPM. Cracking any injection line will drop it to 640 or 650 RPMs.
When accelerating, it feels like a gasser running on 7 cylinders. There's a little bit of that vibration feeling you get when a gasser is missing. Maybe I am imagining that.
I changed the injectors out with some rebuilt Uhaul injectors. There was definitely a very wet injector with the old ones, they had gray paint so I expect it was time to change them at 140k miles. All return lines and caps were replaced. Olive for the return line was replaced. Exhaust quit having that burn your eyes with raw diesel going on after the injectors were changed.
Compression was taken cold. All cylinders were at 440 to 455 except one was at 475.
It seems to me like there is an excessive amount of oil in the intake. I will likely change the CDR since it appears to be original.
To recap:
Newly installed rebuilt injectors. New return line kit. New air and fuel filter. Lift pump pressure seems low to me. Burns oil. Smokes grey/white on acceleration. Compression is good.
I do have a Uhaul rebuilt IP sitting on the shelf.
My thoughts were to replace the IP prior to seeing what the fuel pressure was. Now I'm wondering if the fuel pressure is giving me grief and if I should replace the lift pump? Or screw it. Start at the grill and work my way back to the tail pipe replacing everything on the way.