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2010 2011 BMW 5 Series Forum F10 F10 Technical Topics Engine, Transmission, Exhaust, Drivetrain, ECU Software Modifications catless downpipe
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      03-22-2023, 01:44 PM   #1
Matthew_Maz
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catless downpipe

Hello, I just got my catless downpipe installed and it was running good for 100 miles. Later my cars idle starts bouncing. When I let the car roll without pressing the gas, it starts to jerk until I press the gas pedal. What should I do? I might have a leak because I can hear it on the passenger side of the car. thanks
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      03-23-2023, 03:58 PM   #2
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it's probably a damaged or dirty oxygen sensor from the downpipe install.
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      03-26-2023, 05:04 PM   #3
Matthew_Maz
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Quote:
Originally Posted by mike@x-ph.com View Post
it's probably a damaged or dirty oxygen sensor from the downpipe install.
Do you think a tune can fix it? Or maybe if I add a spacer on 02 sensor?
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      03-27-2023, 10:44 AM   #4
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The tune or spacer will hide the code, they wont fix any issue you are having with the car
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      04-15-2023, 02:10 AM   #5
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Quote:
Originally Posted by Matthew_Maz View Post
Do you think a tune can fix it? Or maybe if I add a spacer on 02 sensor?
all the spacer is gonna do is help prevent the CEL from coming on but it's not 100% as mine comes on once in awhile. it's either dirty or going bad
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