MAXMEL44

Just recently picked up an 07 with 99k on it. After a few days at home I noticed it would blow out smoke on startup for about 5 seconds or so. Some side notes coolant level is fine, no sludge I can see, oil is clean. The smoke itself is light grey not white or dark grey. It does not smell sweet, it smells slightly like it was running rich. I have no cel on. I have changed the pcv and also pulled the front plugs, they were clean but did smell a little bit like oil. I've have many Maximas but this has got me.... Any help would be appreciated.

T_Behr904

Are you using synthetic or conventional oil? The two have different colors and smells when they burn.

From your description, it sounds like there is some wear on the valve guides, and a few drops of oil seep into the combustion chamber when it's sitting, and when you start it up it burns off. I've seen this many times with several different types of cars over the years.

MAXMEL44

Ive researched and have heard that also. I think the car has conventional in it. It was changed right before i picked it up probably with the cheap stuff. Im also considering going with a thicker oil(syn) like 10-40. Thanks for the reply

T_Behr904

Sure, no prob.

MAXMEL44

An update........today i decided to get on it a lil bit on the highway. After getting off the HW it started sputtering so i stopped at autozone to find out i have the cel p0304. Cylinder #4 problem.....Pulled the front plugs and some idiot(not me) put in Autolite double platinums...WTF??????!!! so tomorrow im gonna take it all apart and replace with NGK's...

infiniti medic

Nice,
I think the 10 40 will be to thick. 5 30 and some Lucas oil additive. That what I use Mobil 1 and Lucas for my cars

T_Behr904

Probably cyl #4 coil pack went dead. Good idea to replace the spark plugs too while you're at it.

MAXMEL44

Update changed the plugs back to ngk's and changed the oil. Still smoking on startup and the car is going back to the dealer on Monday.. Still under warranty. So we will see

kimbo

Did you find out the problem after taking to dealer?