black smoke after WOT

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Oct 26, 2009, 09:05 AM

justa4banger

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black smoke after WOT

ok, so i have the weirdest problem.....
when i go WOT and let off after 5 seconds, i leave a big trail of black smoke....
i had my check engine light on, popped the codes, and it threw the egr valve code twice.... than i think my front 02 sensor is dead....than it threw a code of running too rich...
im running e85.....
i checked the vaccum hoses for the EGR and their all hooked up ...
the car does not misfire..
can it be that my egr valve is going out???
can it be the front 02 sensor??

plz i need some help on this

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Oct 26, 2009, 09:30 AM

thedru13

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Is your car eating oil?

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Oct 26, 2009, 09:37 AM

bluebanana23

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burnt oil would be bluish hue

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Oct 26, 2009, 09:48 AM

justa4banger

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Quote:

Originally Posted by bluebanana23

burnt oil would be bluish hue

thats correct...
the car does not smoke at idle or cruising

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Oct 26, 2009, 09:49 AM

rolly1818

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seems like u popped an IC hose.

in general (not sure on e85):

black smoke: overfuelling
white smoke: burning coolant/water
blue smoke: burning oil

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Oct 26, 2009, 10:40 AM

justa4banger

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Checked all my clamps...eveything is good

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Oct 26, 2009, 10:58 AM

evo unknown

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does the smoke occur when the car is idling, or after warmed up and driving?

bad air filter? fuel injector leak? bad timing and therefore misfiring?

just throwing out ideas..

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Oct 26, 2009, 11:03 AM

justa4banger

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No smoke while idling nor cruising....only when I get on it and let off than after 5 seconds its smoke...and its not misfiring...

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Oct 26, 2009, 11:19 AM

4G63 T

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on side note would stroker motor will have bluish smoke? normal?

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Oct 26, 2009, 11:53 AM

#10

justa4banger

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bump for some help with knowledge

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Oct 26, 2009, 01:41 PM

#11

rolly1818

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could be ur turbo is on its way out.

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Oct 26, 2009, 01:46 PM

#12

cij911

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Sounds like you are dumping fuel (running rich on throttle lift off )....the fact that you think your o2 sensor is bad and the code says you are running rich - well there is a start...

Log your runs and see what your AFRs jump to after WOT runs....

Also, when cruising, what is your AFR ?

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Oct 26, 2009, 01:46 PM

#13

newbieEVO8

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Check your EGR hoses at the throttle body.

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Oct 26, 2009, 03:10 PM

#14

justa4banger

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my AF stay between 14.7-15.2 cruising...sometimes goes lower in the 12s....
my egr hoses are all hooked up..they are zip tied down...
the AF do go down to 10 flat when i let off though when i go WOT....
can the sensor really be the culprit???

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