Anyone have any other ideas/insight? Im hoping that this issue is caused by something I have overlooked but could I be that lucky? ya, I Doubt it...

 

maybe you have leaky uppipes, u need like an inspection mirror and a flashlight i didnt think mine were leaky cus i found no soot but i went to do my manifold gasket and when i took manifold down whole uppipe came with it

 

Well that was what I thought so I started there. Up pipes leaked so I installed new bellowed up pipes and no more leaks, but still bad mpg and lack of power

 

I am not a diesel mech but I am starting to learn more since it is time for me to work on my 2000 I had since new. I saw the same thing in my truck when I did not put my additive in. I use diesel kleen cetane boost, the new diesel we get sucks and runs like **** if you do not boost it up. just what I have found out. I have a 6 sp in my truck.

 

I too use to run diesel kleen pretty much every tank. I stopped for a while then when I started losing mpg I went back to running it and only saw maybe a .5 mpg gain or so...

 

do you change the oil in the hpop? I am doing an oil flush to my hole system. changed the hpop 6 times now and can see it working. went from cranking the engine for 10 sec to now only 3 sec. I have 1 more full flush to go.

 

Do you get any smoke at all? black or white?

I started losing power and seeing black smoke when I would stomp up a hill. Didn't think anything of it. until my truck couldn't even haul the toy hauler up a hill. It would over heat and smoke like she came straight from hell didn't seem like an electrical issue, more mechanical. So I unhooked the clamp that connects the turbo and the down pipe and discovered the engine warm up valve and had been sticking half closed until it finally shut completely. (like driving your truck with the exhaust brake on all the time except worse) replaced the valve and walla she ran like new.

Another thing is if your seeing loss of power and possibly white smoke it could be your fuel pump and or connection. Had a 02 7.3l service truck started losing power and eventually started pouring white smoke and lost all power. discovered that the connection at the rail mounted fuel pump (between the driver side front and rear door in most cases) there is a black 4 pin connector (only two pins should be in use) that corroded causing a bad connection.


From what your saying, it doesn't seem like this is your problem but I thought I'd better throw it out there just in case.

 

I wish people understood how completly wastefull it is to "change" the HPO...

Every time you step on the accelorator you have just changed the HPO.



Notice the path of oil flow... From the pan to the pump to the HPOP to the injectors to the pan... Nice little change there...

 

Anyone ever heard of measuring the injector selenoid armeture distance with a feeler guage? Thats what my local shop (hypermax) said to do to determine if they are good/bad or rebuildable. Figured if I do o-rings wouldnt hurt to have the injectors flow tested and cleaned/repaired if possible while they are out. Any other thoughts here?

 

Anyone have any other ideas??? Ran my truck about 400 miles over the weekend (mostly highway) and averaged 14.9 mpg. 14.9-15 use to be my around town avg. And around 20 hwy...Anyone have the rifraff frx? Likes, dislikes, improvements?