Loosing mpg
#1
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Model: Cherokee
Loosing mpg
I have a 98 Cherokee with a 4.0 and it is loosing mpg it use to do good. But I'm using double the gas now than what it took 3 months ago. I have a miss at idle sometimes not always. But when it does the check light comes on but the next time I start it it goes out. Need help on what could cause this. Thanks
#2
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Location: Lost in the wilds of Virginia
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Year: 1998 Classic (I'll get it running soon....) and 02 Grand
Model: Cherokee (XJ)
Engine: 4.0
Pull some codes. See your local Autozone or Advance Auto. They will pull the codes for you. Report back.
Some typical suspects for severe loss of mileage:
Codes will tell you a lot.
Check your tailpipe, too. Lots of black soot? Do you leave a black cloud behind you when you accelerate hard?
By the way, it's "losing", not "loosing".
Some typical suspects for severe loss of mileage:
- Vacuum leak.
- Bad 02 sensor.
- Bad 02 heater.
Codes will tell you a lot.
Check your tailpipe, too. Lots of black soot? Do you leave a black cloud behind you when you accelerate hard?
By the way, it's "losing", not "loosing".
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