98 cherokee 4.0 aw4 180,xxx miles well taken care of
jeep is surging at stop lights, get's a slight miss more often when i'm going a constant speed like 70mph on the interstate. one of the o2 sensors is new within 2 years the other is probably factory. the cat is gutted and has been for 4-5 years. i'm really thinking it's the other o2 sensor having intermitten problems. been doing this for several month's. if i run a bottle of fuel treatment (cheap stuff) through it the jeep ran like new. now it doesn't really help. Gas mileage seems to be the same as it always has been about 16 mpg on 31" tires.
i hate to buy a new sensor and that not be the problem. My check engine light has not come on and hasn't been on in the past 2 years.
Any one have any suggestions on what i should do? anyone every had a o2 sensor go bad and it not turn the chech engine light on??
Thanks
jeep is surging at stop lights, get's a slight miss more often when i'm going a constant speed like 70mph on the interstate. one of the o2 sensors is new within 2 years the other is probably factory. the cat is gutted and has been for 4-5 years. i'm really thinking it's the other o2 sensor having intermitten problems. been doing this for several month's. if i run a bottle of fuel treatment (cheap stuff) through it the jeep ran like new. now it doesn't really help. Gas mileage seems to be the same as it always has been about 16 mpg on 31" tires.
i hate to buy a new sensor and that not be the problem. My check engine light has not come on and hasn't been on in the past 2 years.
Any one have any suggestions on what i should do? anyone every had a o2 sensor go bad and it not turn the chech engine light on??
Thanks