Help!!!!

[grassman97]

03 6.0L powerstroke started smoking real bad with black smoke and after it warms up start to hear a knocking! cleaned EGR valve and replaced oil and filters and fuel filters! HELP!!!!!!!

 

[iracemine]

black smoke means too rich, knocking sounds like

 

[rammertide07]

Codes?

 

[grassman97]

there are no codes being sent!!!

 

[rammertide07]

there are no codes being sent!!!

Are you saying that there is no CEL? because not all codes set off the CEL. It takes a more capable scanner (MODIS, AE, etc) to pull these codes.

 

[grassman97]

We have had 2 diffeen code readers on the truck and neither as returned anything! I have a mechanic coming over tonight with an infrared reader to see if it might be a fuel injector. and maybe able to pinpoint which one it is as well.

 

[rammertide07]

The code reader I'm talking about can run 3 different tests (buzz, compression, contribution) on the injectors to see if you have a bad one. The simple OBDII scanners, like what autozone use, wont cut it. I'd bet it will fail the buzz test....

 

[grassman97]

i am pretty new to this so what is the buzz test?

 

[rammertide07]

It actuates all 8 injectors at once (engine is off for this test)....then cycles through each injector. IIRC its the same as the firing order Listen for one/or more injectors that sound weak, or different, from the others.

Compression- self explanatory

Contribution test- test each cylinder to make sure each one is contributing the same amount of work as the others. This is done by the PCM shutting off each individual injector at a time and seeing how much the rpm's drop. If they all drop the same...life is good.

 

[grassman97]

i can tell i still have quite a bit to learn! changed the brakes for the first time last night! needing to learn more and more tho!
thanks for the help!