You really should learn a bit more about the function of your vehicle and vehicles in general, especially before offering advice like replacing an entire exhaust system. The cat being gone won't mess with the runningn of a vehicle, in respect to o2 sensors. The OP tightened a screw or two and solved the issue. No money out of pocket, and sure didn't have to replace the entire exhaust.

Exactly. And the downstream ONLY checks the function of the cat. Has no bearing on how the motor moves fuel.

So basically the spark was happening so late the explosion was happening when the exhaust valve was opened.

Which is probably what caused the cracks.

 

Couldn't say it better myself.

 

Hmmm I believe I called it two pages ago...

 

Do you want a cookie? Pat on the back?

Good for you?

In all reality your "calling it" wasn't really calling it 100% correctly. The motor was never running rich, it wasn't burning the fuel/air mix at the right time.

It was really just the timing being off because of a rotor being incorrectly installed.

I'm actually the one who "called it." I just wasn't sure of the source.


In the end of the day, though, the only thing that matters is the OP got his problems solved. IT doesn't matter who helped, or what was said, he figured it out and thats all that counts.

 

Why do you have to be such a dick? If anyone is looking for some recognition it seems to be you. How about you just STFU... and as far as anyone is concerned Captain_America did call it, aparently you just dont' know how to read very well. Get off your high horse and act your age.
And the rotor wasn't installed incorrectly, the distributor moved. duh

 

So you know more about this than the OP? Intersting. Especially since he said he coudln't explain the situation any better than I did.

And my bad for saying rotor being off, your correct it was indeed the distributor. I had to have been thinking of something else and said rotor instead of distributor. It was the dist that was not correctly installed.

Anyway...

Am I the one making posts about how I "called it?" Nope. Just Captain America. Who seemed to think the cause was the vehicle running rich or timing to be retarded. Neither of which were the case.

And don't get upset because I told you the truth about secondary o2 sensors. You were wrong, and still are.

I'm sorry you think I'm on a high horse. It must be tough to be called out on being wrong and not being able to admit it. At least I admit my mistakes and don't get upset with those who were right and corrected me.

Grow up and accept some criticism.

 

This sounds nothing like "rotor install incorrectly"

A restritced exhasut would cause the symptoms the OP described, but as I mentions we weren't getting the whole story. My suggestion of repairing the exhaust was purly my opinion. I wouldn't want to be the guy driving a POS with cracked exhaust manifold, no O2s, no cat, and loose distributor wondering why it won't run right. To each their own. I'm done

 

Right, you just wanna suggest spending money on things that don't need to be replaced, save the cracked manifold.

Oh, and you wanna be the guy telling people that the rear o2 sensor effects how the motor runs.

Thats the guy YOU wanna be, right?

Like I said, I accidentally replaced "rotor" with "distributor." My mistake, I admit it.

But go ahead and re-read post #31 and #32 in this thread.

This is what I have a problem with. Its inaccurate.

 

Here, read this: http://auto.howstuffworks.com/question257.htm

It will help educate you about O2 sensors and what their prupose in an automobile is. If you get confused with the big words try using a dictionary.

 

Are you effing kidding me???

You do realize there are TWO o2 sensors in the exhaust.

The one closest to the motor does what your cute little link states.

The one after the cat does nothing but trip a CEL if the cat is removed.

It has absolutely no effect on how the motor runs. And this subject has been beaten to death many many times on this forum alone.

Keep talkin man, it just shows how much you need to learn.

By the way, thought you were "done."

 

Since you like links and seem to be the one needing education I thought I'd provide you with some.

This one even has pics for you! I know there is alot of text to read, don't let it intimidate you. If you can't deal with reading that much, just skip to the BOLD title called "A new role for o2 sensors with OBD-II" and the paragraph following it.

http://www.aa1car.com/library/o2sensor.htm

And here is a link to a 3 page thread from this forum. But the first couple posts is really all you'll need to read.

https://www.cherokeeforum.com/f2/o2-sensor-33003/


Have fun learning how much you don't know.

 

Seriously, you do pretty well to make my point, so what's yours?

I've forgotten more about how a car runs then you'll ever know. As stated in both the article I linked to as well as the material you linked to, the O2 sensor provides information to the vehicle's computer to help it adjust fuel/air mixture. I related this to the fact that the OP said his vehicle was running rich.

So what your trying to say (and are not doing a very good job of it) is that O2 sensors with improper readings will never make a vehicle run rich? Why not just say that then? So I ask, what is your point?

 

Having a cat missing won't cause the o2 sensors to adjust for anything.

The first o2 sensor is before the cat. So it could not care less if the cat was there or not. And this is the o2 sensor that the motor uses to control fuel trims. Not the secondary o2 sensor.

The secondary o2 sensor serves one purpose. To let the ECU know the cat is missing or clogged. The ECU does nothing but trip a CEL with this knowledge.

So saying that the o2 sensors are trying to adjust ANYTHING because of improper readings due to a missing cat is completely incorrect.

Period.

 

Enough. Geeze. You two sound like kids arguing. Pathetic. Cherokee do you notice gee oh dee has like 2,500 posts to your 200? So read more talk less or go to your ricer forum where you came from.

 

The OP has a '94 so he's probably only has one O2 sensor anyway. I was just pissed by Gee oh Dee's condescending manner in which he replied to Captain_America. His post count is propbaly that high becuase of useless/pointless post such as that and those that followed. Post count can be just an indicator of how long someone has been a member of the forum and not necessarily their experience. I am appuled by how many people with senior member status are so cocky. And with the last remark you made 00Pajeepcherokee you join the ranks.