Guys, this is my first post despite being a reader for quite a while.

I've searched and searched but all the other posts that were similar weren't quite right so I decided to post, please excuse me if you guys already know the answer to my problem

The truck has been starting a little rougher and rougher over the last three months. I guessed glow plugs and figured with summer coming up in Vegas it wasn't a big deal. The first 3/4-1 mile it runs rough and would miss, but after that it's golden for the rest of the day to include multiple restarts etc.

It popped a check engine light and though I don't remember the specific code right now it was low fuel pressure on each of the eight cylinders. it also popped a fuel control module fault

The oil levels are fine and I refuel from a tank in the bed but it's got an inline water filter on it

It has now gotten to the point where it takes quite a while to get it running when it's cold (if the first start is in the middle of the day when it's 110, I usually don't have a problem). This morning I cranked and cranked with a couple of cylinders firing and a lot of black smoke. It never did start and I had to take my wife's car

HPOP? FCM? Thoughts?

Thanks in advance

 

Well, this is a good old diagnostic that's needed here. ALWAYS start with a fuel pressure test with these. Then you probably (if the pressure is ok) have a bunch of misfiring fuel injectors or possibly a high pressure oil concern.
I'd bet that if you look at the codes here, you have a bunch of cly. contribution codes, which explains that it was running rough, but the cause needs to be pinointed.

 

Grease mark,
Thank you. I'll try to grab those codes and post them here as well

 

Ok guys, here's a couple more data points:
-the mileage has been dropping (~18 down to about ~15 on the highway)
-the problem appears to be worse when the truck is parked uphill (sounds weird I know)
-codes:P0611 (fuel inj control module perf), P0261/4/7/70/3/6/9/82 (cyl X inj circuit low)