Maybe its your map sensor. Mine went out and the fuel was rich try that

 

Well, at least you got a code and have something to go with.
Kinda reading along here, since it reminds me of one of the first cars I had that did the same (you kinda had to shift it in neutral and have one foot on the gas and one on the brake, when attempting to come to a stop, so not to let the engine die). I didn't do any car work back then and cant remember what caused it or how it was solved. But bad O2 sensor does not sounds impossible. TPS would be my next thought. Who knows adjusting the TV cable might do something as well...(cheap and 1 minute job)

 

If your upstream O2S has oil on it there may be a problem. The O2S has holes around the body of the O2S (NTK O2S) that lets abient air in. If the holes get clogged or contaminated with oil, etc., it will cause a shift in the O2S output.

Replace the upstream O2S (and should change the downstream as well).

Upstream NTK O2S 23151, Downstram 23099.

If the CAT rattles and stinks, replace it.

 

Thanks for all the responses.

It sounds like it is gonna cut off sometime while sitting at a light or during braking but runs like a champ going down the road with NO hesitation when hitting the gas.

Was wondering if the cat was clogged up bad, wouldn't it hesitate more? I know it rattles but didn't know if I needed to change the cat with the 02 sensors to keep from it messing up new 02 sensors or not?

Yea the upstream one has some oil on it from where I have a leak where the oil filter screws on so I need to get that little kit to fix that as well. Was hoping just to swap out the 02s and fix the issues as I don't have a ton of cash to put in a cat as well all at once.

What brands of 02s are good? I have seen mixed things here about Bosch...generally good things about NTK (which some online sites list as OEM?), but the best is to get them from the dealer?

 

Everyone says NTK, but a lot of us run Bosch's with no problem. To me at least, it's a very simple instrument, so I can't see it mattering all that much and Bosch is a reputable company.

You do not need to change a cat just because you changed o2 sensors. I avoid swapping cats at ALL costs, in my last 3 trucks I did the entire exhaust AROUND the cats, because screw spending that kinda cash on that crap.

Sure, it may be clogged, which would be another issue - but if it isn't, just keep it til it rots through or gets clogged as hell, whatever comes first.

I'm not even all that sure how you would check for a clogged cat other than going by engine codes and physically taking it down and looking through it, etc.

Perhaps someone has more insight into how to isolate a clogged cat as a problem?

 

We all are sure the oil filter is on the opposite side of the engine of the upstream O2 sensors. Ken posted your actual NTK Part numbers, front and back. I myself am having a tough time trying to figure out your post.

 

Rockauto.com sells NTK Oxygen Sensors, cheaper than the dealer.

NTK part numbers are in post #18, above.

Change them. then see what happens.

 

Yea it leaks at the oil filer then drips down the pan and part of it gets on the wiring of the sensor and runs down.

 

I asked about the cat b/c I didn't want to put new 02s on it and then if it was the cat going bad have it mess with the new 02s.

I asked about the brands b/c I have looked at probably 50 threads on them on here and everybody has a different preference it seems like, lol.

 

Thank for the part numbers CCKen. That is probably what I am going to order this weekend.

 

O2S' are less expensive than CAT's. Looks like your troubleshooting it limited to replacing parts so you might as well start with the cheapest parts.

Your Jeep came from the factory with NTK O2S' and they have proven to be what your PCM likes.

 

Sounds good to me. I know a lot of people have said to get them from a dealer but if it is gonna be the same thing then what is the point.

 

Just read some similar issue in another thread, with a battery dying (see post #5 in this thread https://www.cherokeeforum.com/f2/po1...g-fine-200315/

Was solved with new battery. Might not be related, but who knows.

 

Roler makes a good point.

How old is your battery?

Cheap batteries are good for about three years. Mid cost batteries are good for about four years. High end batteries-five yers.

If you are pushing five years on your current battery, $h!t can it.

When braking to a stop what does your voltmeter in the cluster read?

 

Re-read the link in Roler's post.

I added data pertaining to battery low voltage and idle issues.