JeepRunner5

i will use the napa gold oil filter when i change the oil within the next couple days!

salad

Definitely one O2 sensor. Wherever you read that there were three, stop reading there! Lol

Where is this hole you are describing?

A lot of things will cause poor idle. A proper tuneup is key, lots of XJs are neglected. Don't get all excited now about head gaskets when it's probably a $4/10 minute fix.

That said, O2 sensors are regular wear items, good for about 80,000 miles. An exhaust leaks are bad. But so are vacuum leaks, busted coolant temp sensor, busted TPS, sticking IAC valve, busted air temp sensor, cracked coil, worn spark plugs, degraded ignition wires... You get the picture.

Play catchup with maintenance and go from there!

4WD4EVER

^ This is always the best route that will always produce the most optimal results and longest life-cycle.

JeepRunner5

i am certainly not excited for the gasket but as ive seen this truck was neglected for regular maintenance on certain areas example the oil filter. i already had planed to replace that and drain the oil to replace. I know about air temp sensor and spark plugs but the rest im still learning my way. I should probably buy a repair book on the 93 Cherokee, correct? And start checking things on that list?

VTJeep

OK, I was hoping I was reading that wrong! And we should all be so lucky as to be young and employed, btw! Now, you said there was a hole between o2 sensor 2 and 3, but as salad pointed out, theres only sensor. So where is the hole? Why are you replacing the whole exhaust? Unless manifold is cracked or cat is bad don't do that yet. You need to tune the thing first. Take the throttle body off and the sensors off the throttle body. Clean the hell out of it with throttle body cleaner. You can scrub everything but the pintle on IAC. Get those plugs in as well as cap, rotor, wires, oil, refresh grounds and take some harness cleaner to anything thats gummed with oil. Jeeps aren't exactly maintenance free, but with a little attention and a can do attitude, everything I said, minus the exhaust work, should cost about 100 bucks depending on what o2 sensor you get (don't go too cheap!) compared to the shop charging you for the same parts + mark up and their labor.

salad

Head gaskets don't just explode on the 4.0L like some other engines. These things are beasts.

Repair book? If that's your jive, sure. To be honest you'll get a lot better bang for your buck by checking the tech writeup section here, reading some how-to threads, and checking out the Bleepin' Jeep channel on YouTube.

JeepRunner5

Yeah its all great and dandy until i head to college and lose my full time job to part time, so money will become very scarce for repair. Now, i was told and read the 93 cherokee sport had 3 o2 sensors. I am not 100% thats true but as i stated that's what i was told and couldn't tell you different as i am still learning. Also it is just after the exhaust manifold goes into the exhaust system. It's on about a foot and a half down from the end of the manifold. I have done the cap and rotor, wires look good but ill have someone look them over to be sure. i know where the throttle body is but not positive on how to remove it to clean. I am sure with some searching on google i could figure it out but the IAC i have no clue what that is or where it is placed under the hood. But i want to replace the whole exhaust system as it doesnt sound well but i havent heard it without a hole in it. I hate to take it to the local shop because i would rather learn how to do it myself. Of course with the help of all of you that reply to help me out!

JeepRunner5

My jive is trying to do it myself but reading it through a book or using the tech write up section here im sure i could do without the book as i had no idea this website had such thing. As for a head gasket i wouldnt know as i have only helped my dad replace odds and ends on his jeep. But hes dropped 14k into his and i have only put about 50.

salad

It's cool dude lol. Stop blathering on defending I don't even know what and do some reading. You'll figure it out pretty fast, these things are not complicated

VTJeep

Good luck!

JeepRunner5

Wasn't trying to argue or not listen to anything anyone was saying. I am just new to all of this. I have a full garage at my grasp with the tools my dad has gained over 30 years. Multiple jacks and such. But he told me im on my own and needed to learn to do it or pay to fix it. So again my apologies for frustrating anyone. I will work on what i can for the time being. Thanks for the serious help. As i had no idea where to start.

VTJeep

Never took it as arguing. I just wanted to put to rest the multiple o2 sensor thing. I guess I'll just stay on the blunt train and say that your dad not offering you guidance is very frustrating. I'm glad you have a shop and tools available, thats lucky! It will make a lot of future work much cheaper! But get your old man off his ***.

EZEARL

"Also it is just after the exhaust manifold goes into the exhaust system. It's on about a foot and a half down from the end of the manifold."


Is this where the hole is or your one o2 sensor?

JeepRunner5

Yeah being blunt would work best because a lot of the things said i run to google and for a video on how to do it. Yeah it is very nice to have those at hand but bad when i have no idea how to replace parts and such and thats where you all come in hand and have already helped me alot. My old man though just says its how he learned and wont budge unless its a serious issue. To me the idle is a serious issue as to him its no bid deal but refuses to help. So again thank you

JeepRunner5

That is where the hole is. I havent the slightest idea where my 02 sensor really is from what the forum has been telling me