mknack
NAXJA Forum User
- Location
- california
Hello, lately I have been running into a few issues with my 2000 Cherokee, 4d, 4wd. I am running a 6.5 in long arm, 4.11's and 33/12.5's. I used to average around 15 mpg overall, but that has changed.
Over the last year, it has steadily dropped to about 9 mpg, and thats at best. Im not sure what could cause such a drastic change. I have not changed anything on the jeep since I first bought it 10 years ago and put the lift, etc on. I recently had it smogged and it barely passed for the first time. I cant exactly remember what the NOx number was, but it was only about 25ppm less than the max here in CA. Any ideas what might cause this issue and what can be done to fix it? I replaced the lower two O2 sensors about a year ago now, I never replaced the upstream ones.
Also, I was wondering if there is a fuel filter mounted before the gas tank, or is the filter just mounted on the bottom of the fuel pump in the tank itself. I have never chnged or serviced the fuel pump or anything with the tank since I have owned it. Not sure if this is going to cause any issues or not.
I have also noticed along with the increasingly bad mileage, I also have quite a noticeable loss of power. My cherokee is all of the sudden turning into a gutless pig.
Over the past few years, I have had to replaced the TPS a few times after it kept going bad. I finally bought a factory one from the dealer and it has been fine for about a year now.
A few things that I am thinking about addressing to fix the issues are the CAT for the high NOx reading. Possibly a new exhaust header, since I have the original factory one still. Maybe having someone check the torque convertor to see if its still ok.
Any ides or suggestions would be great
Over the last year, it has steadily dropped to about 9 mpg, and thats at best. Im not sure what could cause such a drastic change. I have not changed anything on the jeep since I first bought it 10 years ago and put the lift, etc on. I recently had it smogged and it barely passed for the first time. I cant exactly remember what the NOx number was, but it was only about 25ppm less than the max here in CA. Any ideas what might cause this issue and what can be done to fix it? I replaced the lower two O2 sensors about a year ago now, I never replaced the upstream ones.
Also, I was wondering if there is a fuel filter mounted before the gas tank, or is the filter just mounted on the bottom of the fuel pump in the tank itself. I have never chnged or serviced the fuel pump or anything with the tank since I have owned it. Not sure if this is going to cause any issues or not.
I have also noticed along with the increasingly bad mileage, I also have quite a noticeable loss of power. My cherokee is all of the sudden turning into a gutless pig.
Over the past few years, I have had to replaced the TPS a few times after it kept going bad. I finally bought a factory one from the dealer and it has been fine for about a year now.
A few things that I am thinking about addressing to fix the issues are the CAT for the high NOx reading. Possibly a new exhaust header, since I have the original factory one still. Maybe having someone check the torque convertor to see if its still ok.
Any ides or suggestions would be great