Combines 96 2166 short of power

[FR]

Maybe the fuel pump needs a reman.

 

[Tango]

Check the injectors also. I have a 96 2166 and had to replace an injector a couple years ago. Ran rough and short on power. Good luck Steve

 

[theredgreenshow]

I would start checking the "cheap things" and work my way up. Obviously, the air supply and then the fuel supply. Those Cummins transfer pumps just recirculate the fuel through the injector pump and back to the tank. I had a Dodge pickup and when I pulled the inj. pump and reinstalled it, I couldn't even reprime the system because the transfer pump was shot, but it somehow still got fuel to the inj. pump. You can crack the return line to make sure it is flowing. Shouldn't have any air in it at all. If that all checks out, I would pull the pump and injectors and take them to get checked. I would go right to a Cummins Shop and make sure to take the engine serial number with you. The shop closest to me says that they sell parts to the Dodge Dealers for the same price that they sell them to me so I save about half by going there--no kidding. Since you recently set the valves, I would even check them again to be sure one hasn't come loose or something. I hope that this helps. Your machine should sail through corn and hardly know it's there. Good luck.

 

[shellman]

All the posts below make sense, but I would look a a couple of additional items before getting too radical. First, check throttle cable adjustment. On the end by the pump you have a spring loaded capsule. It has 3 indicator marks possible to show with the spring under tension. You should see the first one. Any tighter and you will break the pump shaft and looser will not get you to high idle. Second, check high idle rpm. Don't remember the spec, but with emission engines it must be there and not short. (two most common problems from the factory). Check transfer pump pressure. If the transfer pump pressure is low, power will also be short. Check boost pressure, both at the manifold and at the aneroid on the pump. Have seen cases with adequate boost in the manifold, but not at the aneroid-limits fuel. Am not a big fan of doing much with injectors other than replacing. You cannot put the injector under the same stress as in the head. Have seen injectors test "OK", but I have a rod and a ball of aluminum in my shop from an engine with testes good injectors. Remans with core aren't that expensive and will be cheaper if you would need to do anything with your old ones. Additional last thought, did you by chance get some winter blend fuelIJ If so you may be seeing the affect of blending n1 with the n2. lighter fuel with less BTU's per pound produces a less heat from the same volume of fuel. Happy Holidays. Bert

 

[notilltom]

Thanks to all who replied. I appreciate it. 1- No 2 Fuel with 2-5% soybiodiesel which should help lubrication. 2- Seems to have full high idle but not enough "guts" once it starts to pull down much more than 100 RPMs. 3- Not sure what is the transfer pump (the one near the first filterIJ) and what is the aneroidIJ I just want to know enough to ask good questions and describe the situation to a tech rep at the dealer. 4- I suppose I will need reman injectors when it is said and done. 5- Any chance they didn't get a valve_valves set right last summerIJ Thanks much, Merry Christmas Remember, Santa drives a red sleigh and wears a red suit. Tom

 

[theredgreenshow]

The transfer pump should be a mechanical pump on the front side of the engine block. It has a hand primer on it. The aneroid is located on the injection pump and looks like a diaphragm because it is one. What it does is sense the boost pressure from the turbo and regulates the fuel delivery so as to reduce smoke by cutting the fuel delivery at lower boost pressures. If the aneroid isn't sensing an increase in boost pressure then it won't increase the fuel delivery and that would result in a loss of power at high rpm's. The line from the intake to the aneroid could be plugged or kinked or the diaphragm might have a leak. In addition, I would check the valves again just to be sure. I got pretty familiar with the Cummins B engine in my '94 Dodge and the 8.3 in your machine has basically the same fuel system. My Dodge puts out about 370hp and 800 pounds of torque. lots of fun to drive. My hired man drives it now and we don't have to fix it as much because he keeps his foot out of it. Good luck!

 

[dave_morgan]

We had a problem with the aneroid sticking...pulled the rubber seal back and sprayed with penetrating oil...no more problems...I would look there first as it is easy to fix and not hard to see if it is making a full stroke.