am running a 05 6.0 ltr ,I know there not the best by far,but anyhelp here would really be appreciatted.Here is a bit of history on this engine,had the ficm changed 3 mths ago,had hpo chaged 2 ths ago,and then the other day was running fine ,then came to pull away from a store and blue smoke and severe miss started,got it home and put some fuel conditioner,cleaner in and changed oil,it starts right up when u crank,but after a few minits it starts to smoke blue,and after its warmed up it clears up with no smoke,when driving it goes in to limp mode were it will only go 90-95 kmh,no matter how hard you push on the thottle,other than that it seems to run and idle not to bad,but I can tell there is a miss.Long story short,took it to dealer and they say I need a new motor!!!,they say low compression on #1,3,and 5 and #7 is overfueling.But there is no blowby from the oil filler tube and it ran great up till yesterday,please help!,I am ready for a nervous breakdown here.

 

Possible blown Head Gaskit

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ok,,but would a blown head gasket not pressure up the coolant?

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just got a call from dealler,,now they are saying it could be bad valves??,they done a crankcase pressure test and its not to bad,I personally think its just injectors,but don't want to spend 5 grand for nothing

 

Did you try cleaning the EGR valve? THey can cause all kinds of mayhem when they stick

 

Is the Turbo spooling? X2 on the EGR cleaning.

 

It really sounds like worn out piston rings...sorry man

 

I'd double check the FICM. A lot of times you'll see this exact issue, a whole bank of cylinders is "bad".... notice the 1,3,5,7... If it was 4 random cylinder OK, but it's not, it's all on one side. I'd test the FICM. It may or may not be the issue, but it's easy to test and free.

Where are you located?

 

X2 on the FICM. Who did the r&r on the old FICM? Have some knowledgable third party check it out or do a quick check on the FICM yourself!

 

I'd check the EGR to. They can really make them run bad. If it's just carbon on it and not wet your just needing to clean it and lube the stem with graphite.

 

well the same thing happened on my 2003 and it came out to be low fuel pressure in high boost, fuel pumps are spendy but that is what my problem was, take it in for diagnostics