Are they any less likley to stick open?Gum up?If you have a bad injector and exchange all 6 for aftermarket ones are you going to be screwing the next guy?

 

I would think driving habits is probably the key player in gumming up or not, but if you have bad driving habits, bigger injectors would just accelerate the problem you would think. More fuel = more carbon. JStieger's DD3s gummed up pretty bad, but his is the first case I have heard of.

Everyone these days takes the tips off for honing or installs new tips, so your core returns will get cleaned when they are disassembled. If there are no mechanical defects and they are just carboned up, you can trade them in with a good conscience.

 

Yeah, but problems dont just come from the mechanics of the tip side of the injector.

You have a solenoid up top that has many parts and can go bad.

 

I thought most problem injectors (leaking etc) were on trucks with the HP boxes?

 

HP boxes usually raise the rail pressure. Common sense tells me that the injector solenoids are more likely to fail with the increased pressure. Those little relay valves are designed to hold back fuel at a given pressure, you raise the pressure significantly and pretty soon they can't hold the pressure any more.

 

J.Davy - here's my experiences with pictures:

http://www.turbodieselregister.com/f...d.php?t=136945

When I read through all these injector knocking posts, there were lots of stock guys with problems and then DC coming back to them about excessive idle time or no load time so I think driving habits play a big part. Since my problems I have changed by driving habits somewhat - more just driving it like I stole it rather than puttering around, volunteering to move houses a lot more etc.

I think there is also something to be said for Don M coming out with the Flux (40 HP) injectors for the 305/555 crowd specifically designed for the TST PMCR. My guess "speculation only" is that he found by going any bigger you're not getting the atomization with the TST PMCR, which would promote the gumming up. That might also be why (my speculation only) DD sells their packages with pressure box + big injectors - i.e., to ensure the good atomization. If I had to do it over again I would have bought the DD2 or Flux or II right at the start.

Industrial Injection said that while my injectors were really badly carboned up, they could still be cleaned up after total disassembly and reused (if there were no other mechanical defects). I guess they were so confident that they gave me a really, really good deal on the exchange. The DD3 tips were the Italian Sprint type versus factory Bosch, since Bosch doesn't officially sell the tips as replacement parts yet (supposed to be soon though). The Sprint tips are supposed to be pretty good quality from what I've read. I remember AK Ram posting a while back about the DD2's being actually the Sprint EDM's too!

Did you get your rail pressure gauge installed yet? I've been noticing you posting about rail pressures recently!

 

if the whole ,,run it hard thing ,,dodge states was in fact true..then what would be the exact difference in doing so??with more pedal,running it harder,wouldnt the only difference be that the comp would be demanding higher rail pressure?if that were correct,then a pressure box would be a benefit to the situation wouldnt it?or i guess it would depend on when the box starts adding pressure?...........any thoughts on this?..............bama

 

Ahhh yes. Those are the DD1's (50hp) that are straight Sprint EDMs. They get honed just a tad to make DD2s, and honed a little more to make DD3s.

In terms of running it hard to keep the injectors from becoming gummed up, I believe they are referring to heat. You kind of need to get the cylinders hot for an extended period of time. Tow something really heavy occasionally. It takes heat to burn off carbon build-up.

 

I got the generic shaft buy STAR caliming I had to much idle time and dident work the truck hard enough. After a lot of frustrasion on my part and my wifes generasity I got a presure box. I wasent going to get one but she suprised me with one so i put it on. I can honestly say that after putting it on the truck is significantly quiter. It dident quiet down emidiatly but after a little over 4 months with it on I can tell a definate diferance.

 

JStieger,I have not got my gauge yet as Spa moved to a new location and were slow to send it,hopefully soon.I have 2 bad injectors that might have screwed my motor,I will know monday.Does anyone know if there is a difference between the electronic portion of the injector from 03 to 05?

 

My experience with injector knock is as follows:

At least one of my injectors has been knocking for over a year, now. DC refuses to take care of it. It started on a trip to Thunder in Muncie with my 7500lb. travel trailer. The trip was over 8000 miles. Admittedly, I did not hot-rod the truck because, I was concerned with fuel mileage.

The knock is only under load, from 800-1400 rpms. It goes away over 1400 rpms. Fuel mileage & power are normal for an unmodified engine. No white smoke, either.

A few weeks ago, I towed the trailer approximately 8-900 miles to the High Desert Diesel Round-up, in Palmdale, CA. The speed limit with a trailer in CA. is 55 mph. I didn't get much over 60 mph, most of the trip. By the time I got back to Phoenix, the knock was gone.

The thing I have changed is that I started using Primrose 405 fuel additive for probably 4-5000 miles, now.

If my injectors were fouled, maybe it took that long for the Primrose to clean them. I really don't know. I, however, do know that the knock is mysteriously gone. Performance is still the same.

Just thought I'd pass my experience on to you folks.

Joe F.(Buffalo)

 

wow now I am thinking that one of these convereters is in reach, good prices for a tc, never thought they were under a grand..... hmmmmmmm I know what I want to give my truck for Christmas !