Clean those injector tubes

[Vaughn MacKenzie]

In an effort to alleviate a rough idle problem, I thought I'd remove and check out my injector tubes. I brought home an ultrasonic cleaner from work and tossed those babies in there with a mixture of diesel and paint thinner. Sure enough some some small debris particles came of some of them, quite a bit out of cylinder #1. I followed this up with blasting though them with brake parts cleaner and reinstalled them. What is interesting, the Dodge service manual says those tubes are pre-filters, designed to break up particles that get through the system by hydraulic action from the injection pulses. Interesting.

Anyway, it did not help the idle problem one bit (one cylinder slight miss) but it DID give the Cummins an infusion of power that I wasn't expecting! #ad
SOP Meter guesses at least 15-20hp, not as much as upgrading to RV injectors, but at least half of that. I had a blast ripping around town with the windows down in the warm spring air the other day. Man I'd forgotten how loud that straightpipe is! Those poor people who had their windows down too, they didn't look too impressed. Maybe I am a little too obnoxious #ad


Back to the injector tubes, you injector BOMBmeisters should consider removing and cleaning those tubes anytime you do an injector upgrade.

Vaughn

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'01 2500 QC Shortbed 2wd, 6-speed, 3. 54LSD, Cab & Fog lamps, Camper & Tow Pkg.
BOMBed: RV injectors, PS Boost module, Amsoil air filter, straightpiped exh. , Aeroquip 3/8" fuel line w/tank mounted lift pump, AutoMeter Sport Comp gauges, Line-X'd, Amber turn signal conversion.
Mildly BOMBed Performance: 0-60 @ 10. 0 sec. ,
40-60 @ 5. 5 sec. ,
0-100 @ 24 sec.

 

[John]

..... and now, my theory. I believe this is one reason why the '98. 5/'99 fuel filter system is superior to the later version. On the earlier system when the filter is replaced you remove the entire (fluid) contents of the filter assembly (including the filter), the fuel is dumped, the "cup" is cleaned and dried (preferably with compressed air) and a new filter installed. Whereas, on the later design you carefully remove the filter from the top, trying not to have any of the contaminates drain off the filter into the uncontaminated fuel... see where I'm going with this? If the "cup" is not removed from the later version and cleaned in the manor previously described, contaminates can be introduced during the filter change.

..... just an observation made after looking at both designs (after personally using the early design and witnessing several filter changes with the later design)

 

[Vaughn MacKenzie]

yes John, and we know what happens to those contaminants that fall into the filter bowl. . . head straight to the VP-44 then on to the injector tubes/injectors if the engine is still running #ad

 

[John]

..... don't even get me started on the cheap looking, black plastic lid on the later version. #ad

 

[Briar Hopper]

Better a cheap looking black plastic lid on top of my fuel filter, than one on top of the entire engine, like the Duramax. #ad


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Tom
Secretary of the Great Lakes Turbo Diesel Registry GLTDR B. A. D. Boys

 

[Royal]

VAUGHN: The filter in the tubes are called EDGE filters ,which are designed to break up any foreign objects from the injection pump before the get to the nozzle valve. They have been used for many years in the inlet connectors of most all injectors.