Hi Folks:

I've got an injector that's acting up - it's missing at idle, lotsa smoke. When I put it into gear and put a bit of a load on it, it clears up. I'm guessing the nozzle is fouled. No diesel in the crankcase, no codes . . .

Rather than spend 6 million on 6 injectors, I'm thinking of changing the stock nozzles to the DDP 50 horse nozzles. Bad idea?

Thanks.

 

My truck is doing the same. I took it to the shop and they put the scanner on it and isolated it to the #6 injector in less than 5 min.

 

Thanks, but I'm still wondering if changing the nozzles would be a waste of time (and money, LOL!) or if that would be okay. Nothing wrong with the rest of the system, and I'm pretty much certain it's a fouled nozzle . . . Only 120k miles, and everything else is working perfectly, no codes.

 

there is nothing wrong with your nozzles, nozzles do not fowl up on cr. not enough data to help. the scanner just checks to see if the crystal is cracked. just check the injectors with a ohm meter. on your 05 there are three plus along the rail with two injectors on each. they will read 0.4 to 0.5 ohm's. over 1 ohm it is bad. if it is white smoke you have, it is more likely low compression on a cylinder. miller special tools makes a rail cap. cap off one injector at a time to find the one causing the problem and pull that injector, run a compression test to see if it is the injector or compression problem.

 

Hi Carl, and thanks for taking the time. I suspected an injector simply because from time to time I would have a rough idle - nothing really bad, but a minor shudder - that would usually clear up after a burn on the highway. It would resurface intermittently over time, but for the most part it ran well. What was really puzzling is when it's cold outside (Alberta, minus 20C) - I run the glow plug cycle, fire it off, and it's really ragged and smoky for a bit till it warms up. If I plug it in, then it fired right off, clean and normal. Smoke is white-ish, with a blue tinge and when I tap the throttle, a belch of black. Once it's warmed up, if I put a load on it - just in gear and normal acceleration from a stop - after 1,000 rpm it clears up, stops smoking and runs properly. It's only at idle, whether or not in gear. That's what led me to suspect a plugged up nozzle . . . Thoughts?