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NAXJA Forum User
- Location
- Cincinnati, Ohio
I was reading a post about a guy who's problem was almost dead on to mine:
http://www.naxja.org/forum/showthread.php?t=29662&page=1&pp=15&highlight=tps
I have a 1997 4.0 4dr automatic with 77,000 miles and it was doing the same thing: "Everytime I would start up the vehicle it would run for a few seconds and then it would start to sputter, make a couple pops/clunks under the hood like it wasn't mixing fuel right or getting enough gas. I could floor it and it would still do it, till it cleared up after about 5 seconds and would be good to go. It would only do this at idle and low take-off speeds."
I replaced both O2 sensors, added new exhaust, plugs, rotor and cap, wires, battery, etc. I even bored out the TB and added a bored out spacer thinking I was having bad combustion issues and wasn't getting enough air, but it still did it and still showed an engine light that kept pulling heater circuit codes for front and back.
So yesterday I was at a light turning right to head to my place and all of a sudden it wouldn't go. The engine was running and I had it in automatic but it wouldn't move. The engine would rev but no luck at all. So I put it into the "1/2" gear setting and it worked fine. I went to bed, got up this morning and it ran fine for about 5 minutes and then did the same thing. So I went and had the transmission level checked. The fluid was brown but full. Then I took the advice of someone who told me to check my fuses, which I did and the only one I found popped, was the same fuse you told the guy was told about in the post above about regarding the o2 heater circuit which I was having the same issue with.
So while I was replacing that fuse I also was tightening down a sensor on the left side of my throttle body (if you are looking at the engine from the front). When you unscrew it this sensor, it looks like a small rod. Well, the rod was dirty so I cleaned it off with some TB cleaner, then plugged and screwed it back in. I then hooked the battery back up and went to start the jeep. Well...I put it in gear and pressed on the gas and the sucker almost bogged down on me...and then it did and died. Turned it back on, tried reverse and it worked great, but put it back in auto...even the "1/2" gear and it bogged and shutdown. I restarted it in park, put it in neutral and reved the engine...no problems....except I noticed that none of my gauges were working, rmps, fuel, battery, etc...none of them. I thought maybe I had not put a fuse back in correctly after going through all of them, so I took them out and put them back in again....same thing.
Could it be the sensor I cleaned (if so, what sensor was it?) Could it be my TPS possibly. I don't think the transmission has ever been flushed, could it be that? Could be the fact that the heater circuit for the O2 sensors are now working?
What do you all think or what should I try?
Thanks,
Chris
http://www.naxja.org/forum/showthread.php?t=29662&page=1&pp=15&highlight=tps
I have a 1997 4.0 4dr automatic with 77,000 miles and it was doing the same thing: "Everytime I would start up the vehicle it would run for a few seconds and then it would start to sputter, make a couple pops/clunks under the hood like it wasn't mixing fuel right or getting enough gas. I could floor it and it would still do it, till it cleared up after about 5 seconds and would be good to go. It would only do this at idle and low take-off speeds."
I replaced both O2 sensors, added new exhaust, plugs, rotor and cap, wires, battery, etc. I even bored out the TB and added a bored out spacer thinking I was having bad combustion issues and wasn't getting enough air, but it still did it and still showed an engine light that kept pulling heater circuit codes for front and back.
So yesterday I was at a light turning right to head to my place and all of a sudden it wouldn't go. The engine was running and I had it in automatic but it wouldn't move. The engine would rev but no luck at all. So I put it into the "1/2" gear setting and it worked fine. I went to bed, got up this morning and it ran fine for about 5 minutes and then did the same thing. So I went and had the transmission level checked. The fluid was brown but full. Then I took the advice of someone who told me to check my fuses, which I did and the only one I found popped, was the same fuse you told the guy was told about in the post above about regarding the o2 heater circuit which I was having the same issue with.
So while I was replacing that fuse I also was tightening down a sensor on the left side of my throttle body (if you are looking at the engine from the front). When you unscrew it this sensor, it looks like a small rod. Well, the rod was dirty so I cleaned it off with some TB cleaner, then plugged and screwed it back in. I then hooked the battery back up and went to start the jeep. Well...I put it in gear and pressed on the gas and the sucker almost bogged down on me...and then it did and died. Turned it back on, tried reverse and it worked great, but put it back in auto...even the "1/2" gear and it bogged and shutdown. I restarted it in park, put it in neutral and reved the engine...no problems....except I noticed that none of my gauges were working, rmps, fuel, battery, etc...none of them. I thought maybe I had not put a fuse back in correctly after going through all of them, so I took them out and put them back in again....same thing.
Could it be the sensor I cleaned (if so, what sensor was it?) Could it be my TPS possibly. I don't think the transmission has ever been flushed, could it be that? Could be the fact that the heater circuit for the O2 sensors are now working?
What do you all think or what should I try?
Thanks,
Chris