That sounds about right to me. I will be pop- testing them myself. This is the first time I will be doing a pop- test and I am completely self- taught, so any information that anybody can give me, I will absorb! Somebody else I had spoken with, thought it was somewhere around 3200 psi, so I will test them all and see what we come up with across the board. I was also told that if you stop pumping before the injector pops, that it should hold pressure for x amount of time, and that it should not leak any fuel before it pops off.
I read up on how to take the injectors apart for visual inspection internally, but I'm not sure if that's necessary if you're pop- testing, and I'm honestly not too sure about what to look for in a faulty injector, but I might take them apart just to get the experience with the process.
Reason being for pop- testing: we just did a head swap on our E7 460. I was out with an injury for a little bit, so I was not present for some of the process. I did not have a chance to visually inspect the valve seats on the "new" (they're actually out of one of our decomissioned R- Models) heads. By the time I got back to this project, the heads were already in, and ready for rockers and jake (which is a model 690) installation. I set the valves and the jake, and I had assumed that the injectors were already tested before they were installed (because why would they not be, when you've already got them out?), but they were not.
When setting the jake on valve number 4, I had some troubles getting my clearance, so I spent hours filing the pin in the yoke down, until I could get my adjustment. I'm not sure if that has something to do with the problem I am having with this truck, (and again, if anything I am saying sounds stupid to you guys, take it easy on me! I'm still learning!). The truck starts right up, which makes me feel like the injectors have nothing to do with this problem, because there's no miss and it idles better than it ever has and does not smoke while idling. The only problem initially was a loss of power and the truck was dumping black smoke so heavy upon acceleration, that you couldn't see anything behind you going down the road. We swapped turbos and it cleared most of the smoke up, as well as helping with the power- loss issue.
That being said, you can tell there's still a fuel- dumping issue with it, because there's still a significant amount of black smoke with acceleratio- although it's not when you initially put your foot into the pedal- it hesitates and then smokes, which makes me wonder if we didn't put another bad turbo on it.
Also, when I got back under the valve covers, I noticed my intake valves all tightened up between .001- .004 of an inch. I only had one intake valve that did not tighten. (I am very anal about setting my valves, so I am confident this was not an error, and has more to do with whatever is ailing this truck). I'm leaning toward pulling the heads back off and doing a visual inspection of the valve seats, but while I'm in there, I'm covering all my bases, which is why I'm pop- testing these injectors. My exhaust valves were all still within specs. (Exhaust: .024; Intake: .016; Jake: .015)
One mistake I'm pretty sure I made, was setting the slave pistons on the jake improperly. I set the jake on the compression stroke, and I just read on the jacobs braking system manual, that you should set your jake with the exhaust valves closed. So that is something I need to fix when I get the rockers and jake back on this boneyard baby!
Any input would be greatly appreciated! Thank you all so much for the help! Safe travels, everybody!