Blue98

hey guys my 98 xj had no o2 sensors and ran great but i now needed an inspection so i got o2 sensors and put them in. after i put them in i drove around my neighborhood and my jeep started bogging down and backfiring and getting the power i was giving it in spurts. i checked my fuel pressure thats good. cap and rotor are good. plugs aere good. imnjectors were cleaned. idk what my problem is. and when i restarted my ecu the check engine light stayed off for about 30 mins then went back on. please help me with what you might think is wrong here

fishtaconc

What was the code for this time? Im just guessing possibly clogged cat from running without the O2 sensors.

Blue98

i dont know how to display the code without a scanner but friday im going over to my friends shop to use his scanner

Dre

Go to Autozone and check it with the code reader.

Blue98

it was the upstream o2 sensor. i bought a new one but the old one is a ***** to get out

Dre

Yeah... They always are. You have to torch it or get Wurth Rust penetrator. Even with a 1/2 in breaker bar, you will need a pipe for leverage.

Posted by: Dre

Blue98

lol i loaded it with wd40 and used a breaker bar with my legs and all i did was strip it out so im doing it with real rust penatrator and im cutting the bolt to make it a size smaller hammering a socket on and using an impace gun..lol

Dre

Get "Wurth". I used a lot of products to take my rim off to inspect my drum..... Loosen the nits and went over tracks and bumps for an hour. Tire never moved. Friend sprayed wurth rest penetrate.... 2 minutes with a hammer on the inside of the rim, it flew off. I damn near hit it, pulled it, sprayed it and pried it. Nothing.... Wurth worked like how u use WD40.

Posted by: Dre

Blue98

what good is the wurth stuff if the bolts stirpped lol

Dre

Well... Umm. When in doubt... Cut it out! LOL. tap and die sets are the best. TORCH IT... Like the Fantastic 4... FLAME ON!

Posted by: Dre

Blue98

lol i want it out clean so i have the thread for the new one to go in

Dre

Torch it, the spin the old one out. The threads should stay in tack. The heat will expand the metal allowing both to un mate enough to turn. You keep tugging on is and it won't come out!

Posted by: Dre

Blue98

lol i dont have a torch but i hope running the truck a little will help. and i just picked up some rust dissolver

Dre

My jeep was doing this today. I can't figure out if it is a bad coil pack, injector or plug. Tune up time!

Posted by: Dre

jburg

Mine is doing the same thing I have so far done a tune up, coil and map sensor. No luck yet it seems to be worse in warm or hot weather post if something works.