ok guys new user and liking this site. got a 2005 f-250 6.0 and while driving orwhen the engine is under load bogs out and smokes. but not every time. can be driving about 50 try to accelerate and it boggs down and smokes. take your foot out of it and try again and its fine. need some help you guys seem to know alot let me know your thoughts.. thanks 14dman

 

Sounds a little like an issue with the EGR system. Have you noticed your boost levels? Just in case, do you have an EGT gauge hooked up and if so, does it skyrocket when the truck bogs down?

 

EGR: Check, clean, make sure it is not wet inside when you remove it (evidence of coolant leak).

Turbo: bogging here.. VGT vanes sticking.

Solution: R&R EGR, followed by Italian tuneup.

If that fails, start looking at turbo.

 

no mods truck is totally stock 88000 miles, turbo gauge doesn't act any different, no jumping etc,I was thinking egr valve.????thanks for help and any more ideas you may have.

 

I would be thinking EGR valve as well. Clean or replace depending on condition. I don't know if you have the newer EGR valve or not, but if you don't you might want to consider getting it.

If the EGR valve is significantly dirty then I would also look at the turbo as well.

Those would be my best guesses.

 

hey gearloose, turbo seems to be o.k. winds up when engine is bogging at least the gauge is showing the boost level rising. thanks I'll try to clean egr...also what is an italian tune up???

 

what color is the smoke?

 

hey tex25025, your talking about a newer egr valve?? are there newer versions available from the stock ones? or is it an upgrade? also the turbo, if the egr is dirty what do i check with the turbo??

 

Cheezit,, the smoke is blue and I mean BLUE and smells like raw diesel

 

Italian tune-up = better MPG? - TDIClub Forums

 

PM bismic about it. He knows more about the newer EGR valves then I do. Since I have bypassed mine at 32k, I haven't had to deal with it and I've stayed out of the loop on the newer updates.

You want to check for sticking as well as play in the shaft(since you are getting into it). You can coat the vanes and that usually helps mitigate sticking.

 

I didn't see this. I usually associate raw diesel smell with a leaking and/or cracked injector.

 

o.k. you all have really given me a few places to start looking. I am going to try the EGR valve first to see if it is wet, dirty or sticking then move on to the turbo. hopefully its just a dirty egr. also this started when I was driving in 4wd in the snow. I NOTICED WHEN I switch the selector to 4wd I hear like a pump start to run under the hood would that have something to do with it?/

 

Why didn't you tell us this before??????


Is the 4WD unit a vacuum operated unit?


If so, check for a problem in the vacuum lines, vacuum pump.

Check for oil getting into the pump.. and then expelled somewhere near the engine...

 

blue smoke is over fuel. could be egr issue or vgt valve/turbo vanes.