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HELP!! 06 VE calais l98 Bogging down under 2500rpm

Benji1986

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Mar 29, 2017
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VE V8 Calais
As the title says its bogging down under 2500rpm. It does pick up after 2500 but not as good as it could. over 4500 it really goes well. So when its bogging it is totally gutless untill i get it to kick back a gear. I also feel surging aswel.

It has thrown a o2 sensor code B1 S2. On the live readings on the scan tool i can see the graphs on the 3 working o2 sensors spiking almost in sync but the problem o2 sensor is almost flatlined with very small variations on the graph.

So i have replaced the problem o2 sensor but im still get the bogging issue. i replaced the fuel pump also.

im at a loss as it pulls hard after the 4500rpm.

Auto feels fine. Is there a reset procedure for the ecu after installing o2 sensors??

Im really at a total loss. :(
 

Benji1986

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Its all standard. No custom tune. far as i know i dont think it blows any smoke
 
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