It is spring here in North Carolina, so not very cold. My car starts fine. Glow plugs are new. But has a very rough idle now upon starting. I use diesel fuel treatment every fillup. I purged with Lubro moly about 6 months ago. I rev the engine a little and it will finally smooth out.

Should I purge again or is it time to rebulid injectors?
260k miles

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1982 300SD Light Blue
2002 Honda Accord SE
1974 Toro Wheel Horse Tractor
2000 Toyota Tundra Pickup

Do the purge again.....if it doesn't work then I would get them tested....and or rebuilt if needed.

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Proud owner of ....
1971 280SE W108
1979 300SD W116
1983 300D W123
1975 Ironhead Sportster chopper
1987 GMC 3/4 ton 4X4 Diesel
1989 Honda Civic (Heavily modified)
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Section 609 MVAC Certified
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"He who fights with monsters might take care lest he thereby become a monster. And if you gaze for long into an abyss, the abyss gazes also into you." - Friedrich Nietzsche

Anytime I come across someone talking about using DP I have to chime in. DP is snake oil. The only way to effectively clean your injectors is to take them apart and soak them in carb cleaner. It's too easy and for the cost of a can of carb cleaner (not the spray kind) vs DP, you can clean lots of injectors. For what I've seen, DP, unless your local parts store carries it, costs close to what you would pay for a can of carb cleaner when you include the cost of getting it shipped to you.
I tried DP once. The car still ran the same after it was run through the system. I then upon the advice of a senior member here pulled the injectors one by one pulled them apart and soaked each injector individually. Before soaking the injectors, I inspected all the parts. They were still dirty and this was just after running the DP. After soaking them in the carb cleaner, the parts sparkled like new. The car idled much better after cleaning them with the carb cleaner.
One last thing, while you're at it make sure you get new heat shields. You can't reuse them after pulling the injectors.

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DJ


84 300D Turbodiesel 190K with 4 speed manual sold in 03/2012

I was assuming he would have been sending them out......if he has the means to pop test them for spray patern due to their milage then doing it at home is a good idea

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Proud owner of ....
1971 280SE W108
1979 300SD W116
1983 300D W123
1975 Ironhead Sportster chopper
1987 GMC 3/4 ton 4X4 Diesel
1989 Honda Civic (Heavily modified)
---------------------
Section 609 MVAC Certified
---------------------
"He who fights with monsters might take care lest he thereby become a monster. And if you gaze for long into an abyss, the abyss gazes also into you." - Friedrich Nietzsche

I just did the diesel purge, and it did not get dirty, and had no noticable effect.

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Think Alternative Energy!
300CD '80 (now gone but not forgotten...)

Could you take them to a dealership or someone with the testers to see if it has a good spray pattern? That is what I did with mine when the head came off. The report was that they all sprayed like they should

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01 Ford Excursion Powerstroke
99 E300 Turbodiesel
91 Vette with 383 motor
05 Polaris Sportsman 800 EFI
06 Polaris Sportsman 500 EFI
03 SeaDoo GTX SC Red
03 SeaDoo GTX SC Yellow
04 Tailgator 21 ft Toy Hauler
11 Harley Davidson 883 SuperLow

I either have the dealership or the local diesel injector place. I am sure either one could test and tell me.

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1982 300SD Light Blue
2002 Honda Accord SE
1974 Toro Wheel Horse Tractor
2000 Toyota Tundra Pickup