I found that my low fuel mileage was do to too much oil on spector air filter contaminating exhaust oxygen sensor, and also due to using carb cleaner or gas cleaner fouling O2 sensors. replaced front and rear (catalytic converter) O2 sensors and coolant temp sensor (which can also effect gas mileage), brought my gas from 55-60 miles per 1/4 tank to 75-80+ miles per 1/4 tank (4 cylinder). Also My jeep ran rough (after cool down) due to front oxygen sensor, changed and fixed that problem. However often jeep would buck and backfire, during certain conditions that I tracked to battery sliding into computer wiring harness. I placed 1" spacer on rear battery clamp to push battery forward away from wiring which stopped disruption of sensor input / output signals.
Hi,
This is a broad spectrum of possibilities. I would first start with a simple approach of insuring good gas.
When these symptoms occur, get a bottle of fuel additive and add to your tank. Possibly you have some condensation issues. This could be just the ticket... I hope so. Good luck.
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I found that my low fuel mileage was do to too much oil on spector air filter contaminating exhaust oxygen sensor, and also due to using carb cleaner or gas cleaner fouling O2 sensors. replaced front and rear (catalytic converter) O2 sensors and coolant temp sensor (which can also effect gas mileage), brought my gas from 55-60 miles per 1/4 tank to 75-80 miles per 1/4 tank (4 cylinder).
My jeep ran rough (after cool down) due to front oxygen sensor, changed and fixed that problem. However often jeep would buck and backfire, during certain conditions that I tracked to battery sliding into computer wiring harness. I placed 1" spacer on rear battery clamp to push battery forward away from wiring which stopped disruption of sensor input / output signals.
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