Some May recall my previous problem with my Fuel pressure. Initially the thought was air in the lines. But now I think it's something to do with the air dog pump block area itself. It still could be a house in this area,i dunno. What I do know, is that the problem is stemming from this area.

 

Last night after work, I killed the batteries trying to get the truck to crank over. Luckily I had a guy to jump me.

 

On the first startup of the day, it cranks over no problem. Sits afterwards, then it becomes a problem. This has happened a few nights in a row now. But not bad enough like Last night.

 

I'll bump the starter to get the pump to cycle, and I can distinctly hear a whirring noise like it's not primed. But maybe after a few bumps it'll prime and the whir noise goes away, the pump changes in sound and Fuel pressure goes back up.

 

Mind you I get about 17psi, when it's not sounding primed. But when it gets primed, 20 to 22psi. I'm at a loss here, and tried calling air dog But they didn't answer. Probably called too late...

 

Any idea what it is? Could the fittings to the pump block be bad? If it happens again tonight, I'll record video of it to try and get it.

Well as outlined in my thread about seeing grandma, the injectors were the culprit to my fuel problem the whole time. 

 

With that being said, with the injectors progressively showing a decline in performance over a course of a year or so, what could it be from?

 

I bought DAP 75HP injectors about 5 years ago when my stock set went bad. Over the course of 5 years i maybe put 40k miles on the injectors. Why would they have gone out so prematurely?

 

The representative at DAP didn't offer much up as to why they went out. I was considering another set from them but I'm hesitant now. I don't want to encounter this problem again in another 5years/40k miles. 

 

Anyone have any suggestions or input to the matter?

 

Mike i need that guys number you suggested to me in Lewiston because i never made it to him on the way back obviously. 

 

One i get mine bench tested and can find out what's wrong with them I'll give everyone a heads up. But in the meantime I'd like to be able to make some sense of this...

Here you go...

http://www.manta.com/c/mmd0zfg/idaho-diesel-technology-inc

Called guy in Lewiston. Recommended me to a couple shops located in the valley instead. 

 

Called one place, guy told me don't expect any performance injector to last long. Said they are media blasted to make the holes bigger. 

 

Said the largest i could go,reliably would be the rv275s.

 

He mentioned something about laser cutting too, but never got to that since i lost phone reception. 

 

Any thoughts on the matter? If i buy another set that gives me an extra 100hp, say, should i expect them to poop out on me in 5 years or less? I'm confused...

That doesn't sound right to me, especially ot of a quality injector but I'm not an expert in this area so hope other chime in.