Hi everyone,
My 02 with 182K miles on it has had a gradual, but overall dramatic decrease in city fuel economy over the past year or so. The type of driving we have done hasn't changed in any dramatic way, and my driving for economy has definitely stepped up after seeing the decrease, but still seeing quite a large effect. I used to be able to see 16-17 MPG without too much difficulty. This was real, calculated MPG. I'm now down to about 10.5 or 11. Interestingly enough, my highway fuel economy is the same as it's always been - between 20 and 22 depending upon speed and terrain. I've kept up maintenance as far as fluid changes, tire air pressure, etc. I don't know what would cause such a loss of city economy without affecting highway. I did change my O2 sensors about 2 years ago - using Denso universals. Apparently the TB isn't too happy with them as I frequently get OS heater over current CELs, especially when it's cold out, or when the vehicle is started and left to idle for any length. I will change them soon to OEM Delcos, but I'm not sure that will do too much.
Other than economy, I don't notice any changes at all, except for rough idle due to bad engine mounts. This engine is a replacement (my original had the cracked sleeve issue), and has 86K on it.
Any thoughts would be appreciated. I can't afford to replace it, nor do I want to, but $60.00 fill ups every 160-180 miles is getting really annoying.
My 02 with 182K miles on it has had a gradual, but overall dramatic decrease in city fuel economy over the past year or so. The type of driving we have done hasn't changed in any dramatic way, and my driving for economy has definitely stepped up after seeing the decrease, but still seeing quite a large effect. I used to be able to see 16-17 MPG without too much difficulty. This was real, calculated MPG. I'm now down to about 10.5 or 11. Interestingly enough, my highway fuel economy is the same as it's always been - between 20 and 22 depending upon speed and terrain. I've kept up maintenance as far as fluid changes, tire air pressure, etc. I don't know what would cause such a loss of city economy without affecting highway. I did change my O2 sensors about 2 years ago - using Denso universals. Apparently the TB isn't too happy with them as I frequently get OS heater over current CELs, especially when it's cold out, or when the vehicle is started and left to idle for any length. I will change them soon to OEM Delcos, but I'm not sure that will do too much.
Other than economy, I don't notice any changes at all, except for rough idle due to bad engine mounts. This engine is a replacement (my original had the cracked sleeve issue), and has 86K on it.
Any thoughts would be appreciated. I can't afford to replace it, nor do I want to, but $60.00 fill ups every 160-180 miles is getting really annoying.