Originally Posted by tssguy123

Dunno if this'll help much, I haven't had a chance to go outside and let the Jeep idle for 20 minutes or so. I did this earlier:

Originally Posted by tssguy123

Not the o2 sensor voltages, just the STFT @ LTFT %s. I did notice that the o2 sensor voltage (I believe it was upstream, [on second thought, it may have been both of them]) stuck at 1v for a bit after I turned the Jeep on. Is that normal or could it point to a wiring issue? I'll get more into this in the morning, but yeah. When I do do this is it okay if I drive around while I let it log? Shouldn't matter right?

Originally Posted by salad

Well. I can tell you that yes, you have something wrong lol.

Start checking other sensors. Something is amiss.

Originally Posted by salad

Have you replaced all of your O2 sensors already?

Originally Posted by salad

Yup, once it warms up though. Here's an example of what you're looking for

That's not from a Jeep - because I'm lazy - but that demonstrates a mostly working cat. The signal from upstream represents the computer adjusting fuel to hit the 14.7:1 AFR. Obviously not a, er, fine work of art since it's constantly turning the amount of fuel up and down. Downstream should be a steady signal once warmed up as the catalytic converter smooths out all the crap. Compared to an XJ that graph looks like it's reading on the rich side with a higher downstream voltage. However, STFT and LTFT will tell you if it's constantly adding a ton of fuel or trying to lean it, or spazzing out and adjusting STFT wildly (points to a vac leak or some kind of other fail)

Originally Posted by tssguy123

Nope, doing that then. Got it. NTK. Was just trying to figure out if there was some bigger issue than my o2s, since I won't be able to get them for another week or so. I guess I'll figure it out when I get them done :P

Originally Posted by salad

Well I'll put it this way... the O2 sensors are regular maintenance items, the other sensors are not, lol. You could clean your IAT and check for vacuum leaks if you're bored. Also verifying temp sensor accuracy is always fun, IAT or ECT could be off.

Originally Posted by tssguy123

Can I just use TB cleaner to clean the IAT? I'm probably going to clean the IAC and TB tomorrow so I may as well...

Originally Posted by salad

Yeah go for it. Don't forget a new gasket for the TB. And maybe electrical tape for the MAP tube if it breaks lol

Originally Posted by salad

Yeah go for it. Don't forget a new gasket for the TB. And maybe electrical tape for the MAP tube if it breaks lol

Originally Posted by sycoglitch

Does the TB seriously have gasket. Im curious if my 01 was "welded"down when i installed my bored TB.

Oh and the tape on the map sensor works great for temp fix

Originally Posted by sycoglitch

Does the TB seriously have gasket. Im curious if my 01 was "welded"down when i installed my bored TB.

Oh and the tape on the map sensor works great for temp fix

Originally Posted by salad

It's grey cardboard lol