My first time on here and need some help. I have an 03 3500 with 5.9L 6 speed manual transmission. Recently my truck started to bogg down in 4th and 5th gear at around 2100 RPM. I changed my fuel filter hoping that was the problem but it did not resolve the issue. Next had my batteries tested and they were both bad. Replaced them both in hopes that was the issue causing the fuel system to not run at full pressure. Did not fix the issue though.. my friend who is a mechanic came out and hooked up his computer. No trouble codes and all injectors are working properly. He seems to think the timing in the injection pump is off and therefore going out. He is coming back out with his gauges to check pressure in injection pump and lift pump. Truck is getting worse and now I notice a lot of white smoke coming from exhaust when it starts to sputter. It also will backfire with some nice flames. Anybody here encounter these issues or have any help? Thank you in advance

 

Pump does not do timing on your 03.

Make sure he knows Common Rail diesels or he might just end up getting hurt from the pressures generated.

 

As Pat said.

How does your mechanic know that the injectors are working properly? What tests did he do to come to that conclusion?

Did you check for oil in the rad water?

Are you sure that there is no gasoline in the diesel?

Maybe time for a compression check?

Is the air filter clean?

When you eventually discover the real cause of the problem, please do not forget to post back so that we can all learn something.

 

thank you for your input. As far as the injectors he had his snap on computer hooked up and went in to the injection system and manually shut each injector off one at a time to see if there was any change. Each injector seemed to be working. He's coming back out this weekend with pressure gauge to check lift pump and other fuel related issues. Will definitely keep you all posted and look forward to more input. Thank you

 

Cool, at least he is acquainted with the common rail.

I am moving this to the 3rd gen section to get better coverage, this is an emergency, I'm broke down in BFE area and not everyone looks here.

Keep asking the questions and these guys will be able to help.

 

thank you. I appreciate all the help I can get. I also use my truck to haul cars and when I'm loaded or going up hills the truck is affected more. Thanks everyone

 

Overfueling? Check your oil level and give it a good sniff. A stuck injector will allow the fuel to wash down the cylinder walls, flow past the rings, into the oil. It would appear as your engine 'making' oil.

I'd also recommend you not drive while 'loaded'.
Back to morning brew . . .

 

so I took my truck in this afternoon and the hooked pressure gauges up to it. The lift pump is on it's way out along with the pump in the tank and not supplying enough fuel. Going with the Fass fuel system and having it done tomorrow. Thanks for your help guys.

 

I have an 03 3500 5 speed bully dog tuned just changed the m-prop it stopped the random bogging down it shutting off but I had the same issue it wouldn't pass about 2,100 Rpms if I where to give it a little pedal it would start to back fire pretty bad if I stayed on the pedal so i checked the pressure I got good pressure I bought a fass fuel kit installed it doing the same thing any ideas please and thanyou.

 

Fuel pump bro. I put a,Fass Fuel System on it. Do the same thing bro

 

I just had close to the same problem mine stopped pulling at 2100 rpm never backfired just no power I installed a Fass fixed my problem

 

I did put a fuel pump I'm still having the issue

 

Could it be the sending unit in the tank

 

the sending unit only tells you how much fuel is in the tank, and nothing else!

 

Checked what pressure? Pressure from the lift pump and that's why you installed the FASS fuel system? If so, you should should check your rail pressure to see if your CP3 is putting out what it should.
Back to morning brew (yeah, in the afternoon) . . .