Haha hey, it was a good idea. Back to square one tho i guess now lol

 

Did the smoke test and found no leaks. Still fighting these misfires. I dont know if this helps in anyway but when i changed the plugs about 3 weeks ago, the old ones were black as night. Only 5000 miles on them. Mean anything?

 

Running rich is what that tells ya . Either too much fuel, not enough air or not hot enough spark.

 

How could i fix this?

 

Sensor replacement/adjustment depending on year of jeep and type of sensor. If your having an issue of runnin to rich/lean, there's a chance it's the o2's. (I only looked at the the post above mine, so sorry if its irrelevant!)

 

Could the o2s go bad without throwing a code?

 

How could you tell which one? My 2000 has like 3 apparently. Im havin the same problem btw.

 

A better scanner will check sensors instead of just codes . Got a local shop you trust .?

 

My dads got a good one, ill see if i can have them check it out

 

There ya go could be Map sensor ,02 sensor CTS

 

Yes, o2's can go without tripping CEL. Most likely it's the pre cat sensor.

 

anybody ever hear of "Replacement" brand parts? i was looking around and came across them on autopartswarehouse. reviews seem solid and the price is pretty unbelievable compared to other brands

 

still got a rough idle. I found out that i have 3 o2s before the cat so its gonna be pricey to do all those. im thinking it might be the grounds, they both looks grimy as hell. anyone know how to get to the one in the back of the engine? i cant reach it at all