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Black smoke when accelerate

Tiny
BEN TRINH
  • MEMBER
  • 2001 DODGE TRUCK
  • 200,000 MILES
I HAVE DODGE TRUCK R1500 ENGINE 5.9.
FOUR SPARK PLUGS ON RIGHTSIDE ENGINE BANK 2 COVER WITH BLACK CARBON.
FOUR SPARK PLUGSON LEFTSIDE ENGINE BANK 1 KEEP WHITE COLOR
WHEN ACCELERATE, BLACK SMOKE BLOW OUT OF TAILPIPE.
I RELACED INJECTORS, NEW SPARK PLUGS, INTAKE TEMPERATURE SENSOR, BUT VEHICLE DOES SAME THING, IT MAY FOUL SPARK PLUGS AT BANK 2, IT SHOW CODE P0174 LEAN BANK 2. COMPRESSOR 120 EACH CYLINDER. INJECTOR LIGHT FLASH WHEN TEST.
PLEASE SHOW ME THE SYSTEM IS PROBLEM.

THANK FOR HELP.
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Thursday, April 18th, 2013 AT 9:43 PM

3 Replies

Tiny
CARADIODOC
  • MECHANIC
  • 33,916 POSTS
Check for a vacuum leak on the right side. The oxygen sensor will detect the unburned oxygen, then the Engine Computer will command more fuel to that side. No matter how much fuel it keeps adding there will still be that extra oxygen there. The fault code will be "running lean" but you will see and smell the extra fuel.
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Thursday, April 18th, 2013 AT 10:42 PM
Tiny
BEN TRINH
  • MEMBER
  • 2 POSTS
Thank for you answer.
I think about vaccum leak, I hook vaccum gaugez and it show steady 18.7. Also I replaced bank O2 sensors and on monitor numbers jump up and down both bank 1and 2 look like. What do you think?
Do you think bank 2 catalytic converter no effiency, how to test catalytic converter for effiency?

Thank a lot for your help.
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Friday, April 19th, 2013 AT 10:54 PM
Tiny
CARADIODOC
  • MECHANIC
  • 33,916 POSTS
You won't find a vacuum leak with a gauge. First look at all of the hoses to see if any are cracked. To check for leaking intake manifold gaskets spray water on the running engine while it's still cold. Look for places it gets sucked in or causes the engine to slow down.

You don't have an efficiency problem with the catalytic converter. That would be detected by the Engine Computer and it would set a diagnostic fault code and turn on the Check Engine light. That would have nothing to do with how the four cylinders are running on the right side.
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Friday, April 19th, 2013 AT 11:12 PM

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