Brandon1985

My engine runs and idles but it uses alot of gas and smokes a little black smoke doesn't have as much power as it should?

CattyXJ

Black smoke means it's running rich = bad gas mileage. Have you given it a tune up?

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Brandon1985

Yes I done just about everything to it for tune up. Is there anything that would cause it to send to much fuel to the engine?

agosto4x4Cherokee

Mine was doing the same, shooting too much fuel had to change the egr valve wasn't opening and O2 sensor 1 cable was burnt out. Now runs like a champ just passed the Smog Test guy said VERY good like a NEW car. hahaha

CattyXJ

X2 on the O2 sensor...if it's tuned up, the motor will default to run rich when the O2 sensor goes

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'89_Cherokee

Vaccum leak? Mine burned gas like crazy, but it was a smoke screen, not just a few puffs.

Brandon1985

Thanks guys I'll try the egr and o2s first.

CattyXJ

If you change you O2 sensors, they're hard to get out. Heat the bung, only the bung, with a torch for a minute before you even try to turn it. Good luck!

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