So, twice now driving at low speeds and minimal load all of a sudden the truck will start running quite rough, becomes sluggish and loses almost all power. Oil is shot into the intake through the breather tube and is fouling intake charge. These codes come up right as these symptoms happen they are p0106 and p0109, which I've read are MAP/Baro sensor codes. Could this happen to have anything to do with the EGR or DPFS sensor? Or could it be a bad MAF? Also has developed an intermittent knock when it occurs. The truck is a 2005 with the 4.6l. The truck has an STS turbo system installed.

 

If it's sucking oil like that, -first, check your PCV valve. When those valves begin to fail and close up, the engine will begin to use oil.

NOTE: If the valve has been serviced/replaced with something other than the correct MOTORCRAFT part, -then you need to replace the inferior valve with the correct one. Anything other than a Motorcraft valve won't function correctly unfortunately. The margins are way to tight and these engines need to breath.

 

Thanks for the reply, I have ordered a new pcv, I was using a pcv for a mustang with forced induction

 

I believe Ford has it, - 1 quart per 1000 miles is normal. I think that's correct. - I can look that up to be sure. Thought I'd just thro that out there.

 

well it barely uses any oil, was just a quick shot into the intake through the breather. I changed out my egr valve because it has the integrated baro/ map sensor, because those were the codes thrown, I am still having problems. I have a rough idle and knock that comes and goes? I would think that if there were a knock it's probably something serious.

After reading many posts, I get excited because there are many symptoms that sound similar to mine, for example I read that auto lite plugs should be avoided. I have them in my truck (because I could not find any motocraft in a colder heat range) and I have had issues such as bent tip on cylinder #4. I pulled the plug from that cylinder to check again tonite and the tip was blown outward? I'm at a loss!! I feel like driving it off a cliff, maybe i shouldn't have put the turbo on it!! Thanks for your help jbrew, feeling sick to my stomach right now..... lol!

 

, Well , all is not lost. Not yet anyway. The knock, - all 2v's knock when #4 cylinder is down, or misfiring. - They just do. Knowing that might make you feel a little better -It would me lol.

But! -

So the gap increased in #4? Is that what you mean by, - "tip was blown outward" ?

I'm not that familiar with turbo systems. - Know what they are and what they do, - just haven't worked with one in the past. I assume that's why you went with a the colder plug ? Well, I think what's going on is some serious detonation problems. Sounds that way IMO anyway.

I suggest you look this over, (- very accurate), - http://www.misterfixit.com/deton.htm

Anything sound familiar ?

Hope it helps.

 

When you put the turbo on, did you get a programmer and custom tune for it? What octane gas are you using?

 

yes I have a custom tune from Rick, at STS. I also run 91 octane and I have a big inter cooler.
The truck threw a code for maf sensor yesterday, gonna change that out as soon as I have the cash, hopefully that has been the problem.

 

yes it was opened up on 4, I read it over and there doesn't seem to be what I am experiencing on a consistent basis. After the egr valve was replaced it seemed to solve some of the problems I had. The knocking freaks me out though, it seems to get quieter as it warms up. Not too sure if it's a rod knock? I removed the valve cover to see if anything was wrong, everything looked good. maybe a cracked flex plate?? i'll keep looking

 

I agree with jbrew in regard to the lean condition. If I were you I would get the use of a borescope and take a look inside #4 bore with particular attention on the outer edge of the piston dome. Usually with severe detonation/ lean condition the pistons top ring land will start breaking off. Then micro welding of the piston to bore is the next phase melting the piston and scuffing the bore. Thats when you start getting intermitten knocking. These pieces of debris will bounce around inside the bore hitting the sparkplug and damaging it. Hopefully I am wrong but these are just my thoughts on this. You can't really be sure until you take a look. I don't mean to make youfeel any worse but you have to just rollup your sleeves, take a deep breath and dive in... most of us have been there before ourselves. Good luck.

 

yeah it's about time i go in and get it looked at, It's kinda like going in for a prostate exam, you gotta do it but no one wants the finger up the bum!

 

edit....

 

?? not sure I follow?

 

His post was removed

 

Just for a smile.....so far it's better than a full colonoscopy..!!!