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What is it doing?
It misses at idle. Ok.
If you bring the RPM up, does it continue to misfire? or does it smooth out?
Ok. Do you have access to a vacuum pump, like a mity vac? Are there any stored trouble codes? is it a 4 or 6 cylinder?
Ok. I really need to know what the code is in order to have a better idea of what is happening here. I suspect the code will appear again very soon, if it's not already there as a pending code. Can you check for pending codes?
Not even pending? Pending codes wont light up the CEL. Did you happen to check it before you disconnected the battery?
It probably has pending codes in it. They will mature soon.
It had both cam and crank sensor codes before?
Do you recall the code number?
Have you inspected the crankshaft sensor connector well? crank sensors are not uncommon failures on those jeeps.
It shouldn't, but it may be making contact, just not very good contact. Try plugging it in good and see what we get
Ok. Without a code, there are too many possibilities as to why it could be giving you these symptoms. Did you say that your scan tool indicated that there was a code, but would not display it yet?
Ok. I assume that yellow means that there are pending fault codes and red means there are current fault codes. It will not allow you to review pending fault codes?
how long ago did you disconnect the battery and clear the codes? I am wondering if you drive it around the block if it will give us the code so we can proceed with troubleshooting this issue
it may take a couple drive cycles to display the code. It is definitely seeing a problem which i assume is why the light is yellow. Unless the yellow light indicates that the monitors have not run. I am not familiar with your scan tool. I have to get going for the day, so if you want I can opt out so somebody else can help you, or you can try to get the code to display and we can proceed tomorrow. it's totally up to you.
Hello and thanks for your guestion.. I will do my best to give you sound advice based on the information you provide. like it was stated before a code would be very helpful in this situation to help rule possible issues. on these 4 liter engines I have seen plenty of these kind of issues caused my the PCM. this is just based off of what I have read so far. check over the PCM and check for any corrosion along the seams mainly at the bottom. also check yout 5 volt refference at the cam and crank sensor (if you can). I would also recommend to drive it and hopefully the code will set again.
Check the cam sensor for correct index, check cam sensor adapter assembly for a seized or binding can sensor shaft. Inspect the can position sensor drive gear for damage. If the cam position sensor drive gear is damaged, remove the oil pan and oil pump, inspect the camshaft drive gear for damage as well.