important question

duramaxiskilinit · 07-05-2008, 01:01 AM

So my friend has an 02 LB7 with a 4 inch straight pipe and a K&N CAI and when its at idle it idles wierd and it puffs out white smoke but i don't think its an injector problem...what else could it be? any ideas will help...thanks

delong_1 · 07-05-2008, 07:40 AM

with white smoke and a rough idle why would you think that it is not an injector problem??

**TYREBOYZ_DEMAXIN** · 07-05-2008, 10:28 AM

Injector...have the dealer do a balance rate on the injectors and i can almost guarantee you there is a injector bad..also tell him to get rid of the K&N filter because there is a small chance his turbo is going but i would blame the injectors firsts.

WorkTruck · 07-05-2008, 09:36 PM

Quote:

Originally Posted by TYREBOYZ_DEMAXIN

Injector...have the dealer do a balance rate on the injectors and i can almost guarantee you there is a injector bad..also tell him to get rid of the K&N filter because there is a small chance his turbo is going but i would blame the injectors firsts.

Why get rid of the K&N? I've heard a lot of bad things about the K&N, but I still don't understand how it is different than a lot of the other filters that you have to clean and oil.

blackdeath · 07-05-2008, 09:45 PM

they say the fiber in the material are to big , but im not sure i really agree ,, but why take the chance , just take the advice from some who have experience with it

**TYREBOYZ_DEMAXIN** · 07-07-2008, 06:38 AM

i have never done a research on them myself but for the research done between brands the K&N filters on a turbo engine took one of the last slotts.i'll see if i cant find that again.

**Diesel Nut** · 07-07-2008, 06:51 AM

Check the oil. If the level is high or smells like raw diesel fuel at all its an Injector, no question.

If the oil is Milky at all its a head gasket.

My money is on injector. Thats a common failure on the LB7 and why the warranty was extended to 200k miles. Take it to the dealer.