So I'll start by apologizing here for posting yet another thread on injectors, but I've been through the forum and lots of google searches and can't quite pin down what's going on.
Truck has 190k miles. I bought it at 188k at auction, so I really have no idea what the history of it was before that. This is my first diesel so I'm not sure what to expect.
The truck seemed to be well maintained. I changed all the fluids and put in all new suspension parts, steering parts, new tires, new batteries, fixed some problems with the rear differential, new wheel bearings, etc. When I drained the oil it seemed odd. It wasn't black like I'm used to with gas engines, it was nearly clear. It looked brand new to me. It also seemed to drain WAY more oil than I ended up putting back in. That should have been a clue, but I just figured maybe some idiot put in way too much oil before putting it up for auction??
It always seemed to smell, but I figured that's maybe just what diesels do? It also white smokes just a little bit at idle (you need a good black background to even notice). It gets terrible MPG (14-15mpg). I wouldn't have done anything except I was out at a waste water reclamation plant and a guy walked by and told me I had bad injectors. Told me he used to run a fleet of LB7s back in the day and identified the problem by the smell alone.
So then I started looking into things. I ran the balancing rate tests. Here's a the results
None look too terribly bad. 2.9 is the highest, but none over +/-4, which I thought was the threshold.
FYI. It starts like a dream. Literally in maybe 1 second. Faster than any gas car/truck I've ever owned.
I didn't do the return test because I figured that was usually only for hard starts. I can do that easy enough if you think it's necessary.
So, what do you think is going on? If it's injectors, why do they all seem within limits on balance rates and why does it start so easily?
Oh, one other thing, there's a stored trouble code P0181. No MIL. I just noticed it when I scanned codes. I don't think that has anything to do with this, but I figured I'd relay it here.