It looks like I have injector issue(s) and will need one or more replaced. I guess how many are bad will be the turning point on deciding whether to replace the bad ones or all of them. I have several questions I would like opinions on. My current mileage is 188K, my fuel pump recently replaced is a basic FASS and I plan on keeping the truck forever unless it turns into a money pit. It's an 03 305hp with the NV5600.


1. Should I go reman or spend the extra money for new injectors?


2. What is your # on bad ones to make you replace all 6 of them?


3. If I do go new and replace all of them, without making any other changes (other than maybe adding filtration) should I go to a higher hp injector? For the money it certainly looks like I should.


4. What brand would you go with if going to a higher hp?


5. How high should I go with the extra hp injectors? 75-100 sounds really nice, but it seems as though only about 60 would be safe without changes, right?


6. I'm posting another thread on this question to get real world info hopefully, but at what point of increased hp injector will my fuel mileage DECREASE? I really don't need the extra hp but if it doesn't decrease current mileage or actually increases it as some manufacturers claim, that would really be nice.

 

I would not go reman's. I went brand new Engineered Diesel +60hp. Reason why I went new is that I hate doing work twice let alone 3x's. Extra hp is a small improvement though since I had 2 bad injectors, I saw a minor improvement in mpg.

Extra HP is all depends on where you want to go with your truck. HP monster? Personally I use my truck as a DD/towing so +60 hp will be nice with a minor turbo upgrade and run pretty good with my stock turbo.

 

Thanks dodge2005. Looking forward to all the other replies.

 

So far, if I replace them all, I'm leaning towards The Industrial Dragon Flys or the Scheid Lightning 50hp. Do these sound like good choices?

 

Either of those 2 you are looking at are reputable dealers. There are more. F1 is a good choice, DDP is another; so is Exergy.

So, in this thread alone you have six good places to research. I agree that all other things being stock, don't go very much on the oversized stix. Especially with the 03, you are limited by your small turbo... 60 hp stix is pushing things a little. The HE341 doesn't have as much room as the HE351 on 04.5 and up trucks. Personally, I'd stick to stock flow and use a programmer to get more. Some mfgs can get you better mileage with the slightly bigger holes... many can't and actually hurt mpg.

I'd replace all 6. You've lost a couple and the rest are not far behind.

 

That's probably what I'll have to do since I plan on keeping the truck. Maybe I'll change the turbo one day eventually. The only time the truck gets pushed is when I pull my 5er and that's usually only 60-500 miles/yr, otherwise it's a pussyfooted around daily driver. I haven't seen the F1 or Exergy and the ddp is a little more pricey than the others.

 

F1 has given me great service over the years.

 

Thanks, Madhat.

 

When I did injectors last year I narrowed it down to Engineerd Diesel, Exergy or Industrial. Went with Industrial Dragon Fly 60 hp and 10k mi later so far so good.
I researched the crap out of how they rebuild them, hone, and price and the Dragonflys won out on both process and price.
Realize that there are 3 categories of replacement injectors. 2 are remans. The cheap $2-300 remans are just used injectors they are tested and only the out of spec parts are replaced. Yes you could be buying just a good operating used injector technically.
The "new" or sometimes still called remans in the $350-500 range are all remans using old injector bodies but with all new internals and solenoid. These are the Industrial, Exergy, thoroughbred, etc ones.
Then there are new virgin injectors, typ OE, Bosch Motorsports, and some hi dollar aftermarket ones with bigger tips. These are the $8-900 injectors.
Call Todd at TC Diesel. I bought the "new" reman Dragonflys from TC for less, shipped to AK, than industrial sells their own injectors retail. Plus I had great service and advice from him.
Used the orig crossover tubes with new orings also with no issues.

 

x2 to call Todd at TC Diesel…he will tak the time to help you get what you want and you can be assured that what you get is what you wanted.

 

Thanks Grit Dog and seafish.