Question about Jeep Grand Cherokee

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I have trouble with black smoke coming from exhaust and also revs up when at a standstill 2.7 diesel

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  • Jeep Master
  • 20,706 Answers

Its running rich as a pig ! (rich = black smoke , unburned fuel)
and idle screams , hot or cold or both? (engine )
no engine stated, we can fix engines unknown.
Gas , diesel, 2.5, 4.0. or bigger engines, name it.?
post the vin and we can decode that. (i can)
the vin decode is in all FSM books made. so , you can too.

rich has many causes.
from lack of tuneups (misfire causes rich)
excessive fuel pressure.
map sensor wires fell off
ECT sensor wires fell off.
thermostat stuck wide open engine never gets to full temp 180F

i can list 50 more
do you want to gue$$ or test?
your call, we cant guess what you want to do or what tools you have.

Posted on Apr 28, 2015

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Posted on Jan 02, 2017

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its about air filter ,

open your filter air & oil both than clean your air filter than try to change your engine or transmision oils also,

black smoke indicates that your engine can't get more fresh air for serial or parellel combustions,

its easy to solve.

try itwith care.no risk is there

THNX

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