How much of a performance loss....

[DsG Cobra 03]

I dynoed my 5.0 couple months back bone stock with flow master outlaw axle back only
weather that day was scorching hot at maybe 101 degrees that car put down 373rwhp and 360tq
Week later I installed a BBK after cat x pipe , week into driving with it 2 codes came up being the driver side O2 sensor and the heat bank 2 sensor , I paid no attention to it being there's no emissions tests where I live. But I've come to learn that causes the car to run lean and causing to lose power and gas.


How much of a performance loss am I having due to the car running like this and the car going into "save the cat mode?" Which I've read it does ?

Also what can I do to solve this? In the following 2 weeks I will be getting a Full 1 piece off road x pipe 3" and a tune.

 

[Blazer707@TBR]

So you still have cats on the vehicle since you only installed a bbk after cat x pipe?

 

[Tron84]

Are you sure it is running lean? Lean usually results in more power and less gas

 

[DsG Cobra 03]

So you still have cats on the vehicle since you only installed a bbk after cat x pipe?

Yeah I still have cats on the x pipe is after them

 

[DsG Cobra 03]

Are you sure it is running lean? Lean usually results in more power and less gas

Well from what I've read the bad O2 sensors and the save the cat mode is resulting is loss of power and gas

 

[Blazer707@TBR]

You need a new 02 sensor.

 

[DsG Cobra 03]

You need a new 02 sensor.

Yeah but do I need it even though I'm buying a complete off road x pipe and a tune ?

 

[DsG Cobra 03]

And also getting the new off road x pipe with the tune solve the power loss problem and get the car back to normal plus the gains from the x pipe and tune

 

[Blazer707@TBR]

You have a problem with the 02 sensors. The tune and x pipe wont fix

 

[DsG Cobra 03]

You have a problem with the 02 sensors. The tune and x pipe wont fix

But doesn't the tune turn off the O2 sensors

 

[Blazer707@TBR]

Some will disable the REAR 02 sensors.

 

[DsG Cobra 03]

Some will disable the REAR 02 sensors.

Yeah the tune I'm getting is gonna disable them because there's no emissions testing here in Florida

 

[DsG Cobra 03]

Some will disable the REAR 02 sensors.

So I'm guessing if I disable them then I'm in the clear and won't need to replace them?

 

[Blazer707@TBR]

You need to take your car to a dealer for the check engine light before you delete the cats and add a tune to it. You have an issue on a stock vehicle with just an after cat X pipe. The tune will not fix your issues as stated multiple times. You have an issue with your front 02's I am going to assume since you did not list any DTC's and just going off of your description.

 

[zinc03svt]

To explain clearer you actually have 4 o2's. The fronts are the wideband o2's and when they go bad they typically put the car into COT mode. Cat over temp which dumps more fuel = fat and slow. The rears are the narrow bands and can be turned off in tune once you go catless. The fronts are 120 bucks a pop or so. All set?

 

[DsG Cobra 03]

Yeah I didn't put the dtc codes there p0050 and p0155 I forgot to mention that there is a missing screw where the cat joins the header and it's been like that since the x pipe install