Xoutpost.com - 02 or maf.???

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does this sound like either going bad maf or pre cat 02 sensor acting up.
today while driving got p2098 bank-2 and p1093-bank-2
one minute lean then the other minute rich.i erase the codes but they came on again maybe an fuel injector also acting up i put in a can of techtron to see if it help.

Quote:

Originally Posted by 1iwilly (Post 1008933)

how many miles on MAF and 02 Sensors?

maf has 138899 original 02 sensors maybe 500 not bosh original on bank 2
bank 1 still has original don't know =if previous owner change them.

Quote:

Originally Posted by jgold47 (Post 1008942)

how many miles on MAF and 02 Sensors?

you should replace your O2 sensors in pairs.
And get OE sensors.you only change them once every 8-10 years.

thanks hopefully this week i'm going to order the gt1 the obd scanner is not that help full but more to erase codes besides i also need to fix the famous tri fecta light

Quote:

Originally Posted by four.8is (Post 1008980)

you should replace your O2 sensors in pairs.
And get OE sensors.you only change them once every 8-10 years.

the reason they were change was 3 weeks after we bought the suv we discover
white smoke and antifreeze smell may of 2014 took spark plug out crank engine antifreeze would come out cyl 2/3 well replace the head as it was crack between intake valve seat and water jacket.who know how long the previous owner was driving it like that.yesterday was code p2098-bank 2 today is p1093 bank-2 so i'm leaning more towards maf 02 reading are working as the y should but i'll wait for the GT-1 software to further test the maf. if i disconnected while running idle goes up then at times not all the time when i plug it back in it shuts the car off then other times when you plug it in it does nothing meaning no change

Quote:

Originally Posted by trader4 (Post 1009036)

Again, more info would be helpful. The O2 sensors in question only have 500 miles on them? Why were they changed and not the other bank? Sounds like there was some problem, codes that made you do the change. If so, that's relevant. Same codes? Diff codes?

Agree with the advice that at 140K miles the O2 sensors should have been changed on both banks.

Quote:

Originally Posted by 1iwilly (Post 1009070)

oh so you had a failed head gasket, cracked block?

Its possible you trashed the o2's coating them with burning PPG.

MAF wont show a bank specific since its in the intake tract of both banks.

regardless, At this mileage, all your o2 sensors need to be replaced.... I'd start there.

then sell the car ASAP. not being a dick, but a cracked block is no joke.

no the cracked head was replace with a rebuilt one not the block.
this is more for in state driving my wife hates the highway with a passion specially 1-4 here in florida

Quote:

Originally Posted by jgold47 (Post 1009077)

i order the GT-1 software today hopefully withing 10 days it will be here.
can i test my maf with this software i'm almost 98% sure it is the maf acting up.as i drive monitoring my fuel trim with the live data scanner fuel trims are all over the place LFT-would go from 0.0 to 4.5 to 2.3 to 0.0 my STF- at idle are from -3.1 to +3.1 no higher than that staying more in the 0.7 range. thanks for your time and advice