i just got my 03 350 cc drw 4x4 a couple months ago. i didnt drive any other 6.0 before i decided to get this one. 113k for 15k was just too hard to pass up, or i thought so.. lol

i kinda thought in the back of my head that the truck was a little slow getting up to speed, but i kinda just figured it was just a heavy truck. well i purchased a warranty along with it and had a small steering leak and needed new ball joints. when i took it to the shop i told the guy i wanted him to drive it, so he did, and as soon as he took off he said it was a pig.. so while he had it he ran the test on it and got the code p2263.. not sure the exact def of it, but it say my turbo isnt being told to spool either from the ebp or the mgp.. i do get boost at around 2600rpm so im guessing as a first time vgt owner that the veins are stuck to the position they are at wide open or whatever.. and the dealer told me they had to put the turbo on..

ok so the first thing i did was remove the egr valve and it looked real clean from some of the pics i have seen on here.. i then went to the ebp sensor and cleaned the tube.. it all looked fine..

now im left scratching my head on the MGP sensor i think its manifold gas pressure.. i try to look it up and all i get miles per gallon stuff or MAF sensors.. if it isnt the MAF where is it located??

so is the MGP the same thing as a MAF?? i only seen one other sensor around and it was by the oil line off the manifold and it looked like a temp sensor..

i have read so many post about no boost and they all seem to be so different.. in my case the engine runs strong and smooth.. it does seem to hold on to the gears when you try to hammer on it.. but im thinking it is just waiting on more power..

i am pretty sure my turbo is ok and the veins are working cause the mechanic was able to control them somehow when he had the computer on it.. holding it around 1200rpm and you could just hear it coming on.. he is sure it is just the MGP sensor..

and if you are wondering why i dont just let him and my warranty fix it is cause the warranty i have charged extra for sensors so i didnt choose to get it, but i have had no problems with them fixing the other things.. all approved with out a hitch after the inspector checked it over goin back to the shop wed to get it done..

 

P2263 is Turbocharger system performance. The code definition says check the MAP (what you are calling MGP) sensor and hose, EBP sensor and tube, CAC system leaks, exhaust leaks, exhaust restriction.

All that being said, check the MAP sensor hose and nipple. There is a small black rubber hose that goes from the passenger side of the intake manifold over towards the HVAC box to the MAP sensor. Remove the hose and check it for plugging and also check the nipple into the intake manifold for plugging. CAC--charge air cooler (intercooler) check ALL the hoses from the turbo through the intercooler back to the intake manifold elbow for leaks. Sometimes they aren't obvious. Check the y-pipe connection from the back of the turbo down to the exhaust manifolds for cracks/leaks by looking for smoke/soot. Sometimes that's easier to do in the DARK with a flashlight to see smoke than in the daylight. Usually requires two people--someone looking and someone to "blip" the throttle.

 

So after reading some other post I tried unhooking the maf.. as soon as I took off I found out this thing does indeed have a turbo on it.. it still didn't act like it was any stronger though.. if anything maybe a little sooner on picking up on the power, but the sound was there immediately..

Any thoughts or clues as to my problem?? Does this indicate the maf as the culprit??

 

Oh and I checked the map sensor hose and found no blockage.. thanks

 

Might be worth something to take out the EBP tube and sensor give it a good cleaning and see what happens?

15 minutes of work=piece of mind regardless.

 

Tried the ebp and tube from the exhaust manifold the other day.. I just cleaned it though it wasn't blocked either just a little bit on the sides.. and I took the tube off on both ends.. so I'm at the point now where I'm pretty sure the turbo is fine.. just I'm guessing by unhooking the maf it just goes to a default position on the turbo veins??

 

Do you still have the CAT on the truck?

 

Yes.. truck is completely stock..

 

Im just curious because I have read a few times a clogged cat could cause a no boost situation

 

Before I hooked the maf I would never hear the turbo until it was about 2600 rpm.. with it unlocked it was real loud at about 1200.. the tone never changed with the rpms during the time it ran with no maf..

 

Dang auto correct.. replace the hooked and unlocked with unhooked..

 

best answer i got from anyone so far is to get the lataest flash installed..
egr system blockage, but if i disconnect the egr with the key of doesnt that disable the system??
i am guessing my turbo is ok cause when i unhooked the maf i assume the turbo went to a default position since i was able to hear it then?.?.....

 

Scheid Diesel told me they had the same issue and the flash fixed it, but i dont understand this flash stuff... how can the program just not be working anymore?? like it has a timer that says ok just stop im bored with this...

he also told me to do the egr complete delete or simply use the block off plate and buy his black max programer..

 

If I do take off the cat and find it is plugged can I just bust it all out?? Had an older explorer one time I did that to..

 

Yes...or just buy the test pipe..... and KEEP the OE cat.... JUST IN CASE the feds stop you for no CAT. Test pipe cheaper than a new cat.