my 98 xj is using a ton of fuel and blowing black smoke o2 senors changed i need help
03-17-2018, 09:11 PM
#1
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Model: Cherokee(SJ)
my 98 xj is using a ton of fuel and blowing black smoke o2 senors changed i need help
ok u guys r the best here 98 xj bone stock using a ton of fuel and blowing black smoke when im in the throttle...o2 senors changed ...where do i go next
03-17-2018, 09:19 PM
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Year: 1998 Classic (I'll get it running soon....) and 02 Grand
Model: Cherokee (XJ)
Engine: 4.0
Get to Autozone or the like and ask them to pull codes.
Also, the the O2 sensor requires power. Check the fuse for it. It could also be a shorted wire to the O2 sensors.
How many sensors do you have on the 98?
One other thing, what brand of sensor did you use? If it's anything other than NTK/NGK or Mopar, it could be bad out of the box.
It could also be a vacuum leak.
Also, the the O2 sensor requires power. Check the fuse for it. It could also be a shorted wire to the O2 sensors.
How many sensors do you have on the 98?
One other thing, what brand of sensor did you use? If it's anything other than NTK/NGK or Mopar, it could be bad out of the box.
It could also be a vacuum leak.
03-17-2018, 09:19 PM
#3
CF Veteran
Do you have a check engine light? What are your fuel trims? Did this gradually happen or just after there was a change made to the jeep in anyway I.e. did you modify with different injectors?
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