Question about 1997 Jeep Wrangler
Use to get 18 mpg now I'm getting apprx. 9 mpg
Posted by Anonymous on
I have a 4cyl 97 jeep wrangler. My fuel economy went from 75-80 miles per 1/4 tank to 55-60 miles per 1/4 tank of gas. I traced this to a bad coolant temp sensor (replace twice), and fouled O2 sensors believed caused by my self by placing too much oil on spector air filter (now wipe off excess and let dry in sun), and using carb cleaner and or gas treatment (stopped using). fuel economy went back up to 75-85 miles per 1/4 tank. (also disruption of sensor input/output signals didn't help from battery sliding into computer wiring harness, which I cured by placing a 1" spacer on rear clamp to keep battery away from computer.)
Posted on Jun 20, 2015
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Posted on Jan 02, 2017
SOURCE: 99 jeep wrangler
get a 6 cylinder motor drop in this is best gas saver for most vehicles 4 cylinders dont have the ability to push all the weight of a vehicle but runs smoothly
6 cylinders are as i put in words are evenly balanced for everyday use and not gas guzzler either
Posted on May 16, 2008
If its using a lot more fuel than usual its almost garaunteed an 02 Sensor. Those are located on the Exhaust Manifold's, are about the size of your thumb, and generally have 2, or 3 wires coming from them. If you can, check them for operation before you replace them as sometimes they're kindof expensive.
Posted on May 16, 2008
SOURCE: 1997 wrangler runs real rich
First thing you need to do is have a code check done (most larger parts stores do this free) For the time being, ignore any O2 sensor codes...Usually that sensor reads rich condition and if too severe it throws a code of it's own but it may be false. Pay attention to temp sensor, manifold temp sensor and other fuel management items. Also, check your fuel pressure regulator...if malfunctioning default is full pressure.
Posted on Apr 09, 2009
There are several items you can check there. Your temperature sender if bad can make the computer think the engine has not reached normal temp, causing the computer to add extra fuel, Your MAP sensor can do much the same thing as can the Throttle position sensor. I'd also check the fuel pressure regulator as default is to a higher pressure than normal.
Manifold air temp and O2 sensors can do that too, but normally not that drastic of a difference.
Testing can be done using a digital multi meter and a haynes or chilton manual as a guide. Begin by having a code scan done (most larger parts stores do that free). Also, make sure the fuel system and lines aren't leaking anywhere...that can use up lots of fuel as well.
Posted on Jul 30, 2010
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