Need some help guys.
My 7 runs good, good power, recent tune up, has 154,000 miles, gets horrible mileage, and pours tons of light blue smoke while at all rpm ranges, at all times. Coolant level has not changed.
Any suggestions.

 

light blue smoke is usually oil being burnt,
white is coolant,
black is too much fuel/ not enough air.....

check your oil level,
when was the last time it was changed?

otherwise, i'm out of ideas at the moment.

 

Oil was changed at tune up, 1 week ago (10/2/05)

 

How old is the O2 sensor? When you say "tune up", what did you change?Did it just start smoking after the tune up or has it been doing it for awhile. Is it consuming any fluids besides gas? What are you considering pour gas mileage? Getting the drift here?

It is impossible to help someone that posts up the most basic question without any details.

 

What does the smoke smell like? burning oil, raw fuel, etc.

 

I did not replace the O2 sensor, just plugs (which were fouled), wires, and oil change.The smoking has been going on for some time (about 3,000 miles, on start up, went away at operating temp and after oil change) Gas mileage is in the 9-12 mpg range. Fluid consumption has been what I would consider as normal for these engines (no coolant loss, moderate oil usage), with the exception of gas.

 

I will make a note of smell today.

 

Try changing out your O2 sensor, they are less than $20 at your local Autozone for a universal Bosch replacement.

 

i was getting 9 mpg until i :

1. cleaned fuel injectors and got a new fuel filter
2. new air filter
3. new 02 sensor
4. new spark plugs and wires
5. shift at 3.5k rpms

now i get 18 mpg =]

 

The smoke is light gray, and it doesn't completely smell like oil, but not at all sweet like coolant either. The engine runs great (smooth and responsive, up to 5.000 RPM's, that's as far as I took it sitting still)
I am going to change the O2 sensor Sunday, hope that helps some.

 

I put in a new O2 sensor and for 1 minute there was no, repete NO smoke at all, then it started smoking again, not as bad, and calmed down quite a bit, but still smoking more than usual, any more suggestions?