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I have this same Jeep. When I first got it it ran like crap. It used like a half a tank to go like 20 miles. I changed the Oxygen sensor, plugs, wires, and rotor\cap. It took care of this problem. I also ran a couple tanks of injector cleaner through it and this also helped. This helped in my case. If the o2 sensor is bad it will cause bad fuel mileage and possibly idle problems. Bc the computer adjusts the fuel air mixture by what the o2 sensor reads.

You have a coil not cap and rotor. The idle control valve is inside or on the side of the throttle body. Clean it out, lube linkage, seafoam it, O2 sensors are expensive and the code is set off by other issues such as carbon build up, idle control valve not clean, the computer thinking the air is rich and dumping more fuel.

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Q: Why does your 95 Jeep Wrangler 2.5 4 cylinder fuel injected get such poor gas millege and idle like it is going to stall out?
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