According to my scanner the cam sensor is working fine. I did pull the DPFE, found a bunch of crud in the vaccum ports and tested it for resistance and there was none so I replaced it, picked up a new EGR valve too. The DPFE didn't solve the issue but I'm going to go ahead and replace the EGR valve tomorrow and see if that changes anything.After change the DPFE and test driving today I did finally get a code for Lean Condition so it could be the EGR valve sticking.....I'm about ready to cut my losses though lol This has been a frustrating endeavor

 

FWIW, my advice. Replace the EGR as said. Replace the PCV valve. Get a quality coolant system flush. That means don't go to a muffler shop or quick oil change. If you can find a shop with a Mahle VCX4 machine. It operates at 55 to 110 PSI and will clean out all the all the crap in your engine. I believe it also back flushes in the process. The machine brought a 4.2 of mine back to life and what the machine takes out of the engine goes to a clear tube. You won't believe what comes out of your engine.

 

What are your codes? Post them, and fix the real problem. It is not often that a Ford EGR creates a lean condition. GM yes... they use electronic EGR's that die all the time.

Being a parts changer without addressing the real issue will indeed makes this a frustrating endeavor.

 

That was literally the only code p0174 lean bank 2. That was it. Code gave me a laundry list of possibilities. The PCM isn't trying to help me at all lol. I had to run it till it stalled just to get it to squeeze out that lean condition code. I've been running my Autel MaxiCOM MK808 on it this whole time and the PCM refuses to tell me anything useful. On the old PCM it had 1 stored code for the IAT P0113. I replaced the part and the code never came back. The code could have also meant a short or a bad PCM, changed out the PCM. I've been running it like crazy with my scanner hooked up trying to find any clue as to what's causing it and it wasn't until yesterday that I received that lean condition code which for the most point is rather generic.

I'm going to replace the EGR valve today and see what comes of it. It definitely looks like the original EGR and looks cruddy just like the DPFE did. When I pulled the DPFE and tested it for resistance and got nothing in addition to the visible shape of it tells me it could have been part of the problem. The new DPFE tested fine for resistance.

 

The issue is completely random. The truck drives fine for awhile then boom, it happens. Sometimes it'll stop and be fine again after a few seconds and sometimes it just persists and popping it in neutral, shutting the engine off and back on again allows it to go just fine again. There's no rhyme or reason to it, no codes, nothing. It's absolutely bonkers. The fact that it's random and can be temporarily resolved leads me to believe it's something mechanical failing or sticking. That's why I was able to believe the possibility of the EGR valve sticking. I monitored the fuel pressure from my scanner during an episode and the values were all the same from when it's acting up or running fine, nothing is out of the ordinary. PCV valve clogging up or something maybe. I'd like to think if were a bad vacuum line it would be more consistent but I don't know a whole lot about this engine in particular.

 

If the EGR was causing a lean condition, you would be lean on both sides.... so you would have P0171 and P0174 together. I really don't think the EGR is going to fix your issue. The 4.2 is pretty notorious for having crappy intake gaskets. I am a lot more familiar with the 4.6 and 5.4, but I know enough to think you're barking up the wrong tree.

 

Well I just finished replacing the EGR, used seafoam spray on the throttle body/intake and cleaned it out and added an extra 5 gallons of fresh 93 octane to the tank. When my wife gets home I'll go out and drive it and see if it happens again. Unfortunately the one place where the issue is consistent, it won't start doing it sitting still in the driveway, it only starts happening when you're driving it.

Would a leaky intake gasket be this intermittent though? I would imagine if that were the case, the issue would be all the time not just randomly and cleared up by shutting the engine off and back on.

 

Not with an intermittent problem. Intakes will be constant. Let us know how it turns out tonight and if that doesn't cure it or help it, we can all brainstorm together. Good luck.

 

That's what I was thinking. Thanks for all the assistance, it's really appreciated. I have my toddler and I don't want to take him out with me in case I get stranded but I was able to at least sit in the driveway for about an hour with it running and revving it with my Maxicom hooked up to it. Nothing out of the ordinary, no spittin, no sputtering, nothing. But like I said, I was never able to get the issue to arise while sitting still, it always happens while I'm out driving and the engine is under a load. So as soon as my wife gets back I'll head out and run it and see what happens. I'll keep the thread updated and let you all know what I figure out. Thanks!

 

Most of the guys on here are glad to help a guy out, and most are knowledgable about the GEN 10's in general. Some are more suited to older and even newer rigs that just don't relate to GEN 10's own personality. Not everything that works on a later truck will work on our GEN's. We try and help to the best of our abilities, but like everything else, if you don't receive all the information from the owner, most of what we say is generalized. Once the make, model and engine/trans are listed, then we can usually help and most often we are correct in our information. We do blow it at times, but we aren't there personally, so it only takes one thing to throw off a generalized answer.