Another shuttering, stalling Jeep. Lol
Ok, so I got some help in another thread, but to keep from hijacking someone else's thread, let's start a new one. Ok, I'll start from the beginning. Bought this jeep. 97 ZJ Jeep Grand Cherokee with 5.2. When I first got it, it was stud seeing a little at idle. Two days after driving it, it started. Between 1300 - 1700 rpm's it would start shaking very bad. I guess this would be shuttering. Took it to the parts store and got the codes. Misfire on 3, misfire on 7, random misfire, o2 sensor upstream.
So I started with plugs and wires, changed them, unhooked the battery, and let it set for a bit. Hooked the battery back up and sent for a spin. Ran like a top. No problems whatsoever. About 5 miles, it started stalling or shuttering. This was a different feeling than the shaking before. This is like letting your foot off the gas, and putting it back on very quickly. The car would not respond this quickly to your foot if you tried. Just trying to describe it the best I can.
The next morning, I got up for work and decided I would take it to work. It's only about 7 miles and the roads were icy. So I cranked it up, backed out of my driveway and when I came to a stop to put it in gear, it died. I Cranked it back up, and drove it to work. Somewhere between home and work, the check engine light came back on. That night I went out there to crank it to leave from work, and it took me forever to get it cranked. Lots of revving, to keep it from dying. I finally got it stable enough to be able to leave work. On the way home it was stalling very bad and jumping. I stepped on the gas and tried to rev through it, and it almost died on me. I went straight to the parts store, and got them to pull the code. Misfire on 7.
After getting home I parked it for the night. Today, I drove my car to work so I wouldn't have to deal with that. Upon my research and remembering that the first codes I had pulled said something about the o2 sensor, I figured I would do a test that I saw in another post. I unplugged both of my 02 sensors. Cranked it up, backed out, and it died. Took me forever to get it cranked back up. I started mashing the gas and the engine finally cranked back up. After a few minutes of revving, I finally got it to stay cranked. I drove it down the road, and it ran pretty well. It had one little hick up going up a hill at about 25 mph, it started shaking, I gave it gas, and it about died. But it really ran very well expectorant that one thing.
So I think I have multiple problems, but that's just what I think. It defiantly runs better with the 02 sensors unplugged. Are they ok to leave unplugged? What else do you think I need to look at and test I can do. Thanks.