Getting 8.5 mpg need help

[BlueCollarTahoe]

bump

 

[JollyRoger01]

Can you graph data? Specifically B1S1 B1S2 B2S1 and B2S2. Monitor these 4 at OT in park at 2k rpm. No accessories on and turn all the lights off.

 

[BlueCollarTahoe]

Can you graph data? Specifically B1S1 B1S2 B2S1 and B2S2. Monitor these 4 at OT in park at 2k rpm. No accessories on and turn all the lights off.

i believe i can with that app. ill try it tomorrow.

 

[BlueCollarTahoe]

Can you graph data? Specifically B1S1 B1S2 B2S1 and B2S2. Monitor these 4 at OT in park at 2k rpm. No accessories on and turn all the lights off.

You talking 02 sensors right? I did it for both ft/ and o2 sensors. Ftb1s1 and ftb2s1 are the only ones that were jumping. Sensor2 in both banks were flat. Don't think its giving any feedback
Now when I did the 02 sensors b1s1 was jumping. Bank1s2 was semi flat. Bank2s1 ans bank2s2 were jumping. Or are you talkinf about stft and ltft? Im in the car now so i can get realtime sata on what's needed and upload. I jave screenshots won't ley ne upload them right n9w

 

[BlueCollarTahoe]

all screenshots were done at 2kRPM after reaching operating temperature with nothing extra on and lights off.

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[BlueCollarTahoe]

@JollyRoger01

 

[BlueCollarTahoe]

Bump

 

[swathdiver]

It's your cats. Those lower O2 sensors should be moving around like the upper ones.

 

[BlueCollarTahoe]

It's your cats. Those lower O2 sensors should be moving around like the upper ones.

really? i thought the b2s2 was normal? ive only changed the up and down on B1 about 15k miles back acdelco. test the cats next??

 

[BlueCollarTahoe]

MagnaFlow 93419 Direct Fit Catalytic Converter

thoughts on this replacement kit if it is indeed the cats?