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Not on either Mini I have owned. On my GP, I have the JCW intake box with Mini Madness filter and the trap door removed. No codes yet. Is the ITG filter installed in the JCW intake box? I sure would not think that a little increased noise from air intake would set off a knock sensor code.
However, on my 1995 Camaro Z28 (LT1 engine) I know that increased engine noise can cause the knock sensor to think detonation is occurring and thus retard the timing. When we added headers we had to change the sensor module so that it was less sensitive to engine noises. However, that car is ODB-I so no code was ever set off.
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2006 MCS JCW GP #1405: Adj Front Camber Plates, 19mm Rear Sway Bar, MM Front Lower Brace, Milltek Cat-Back, TCE 13" Front/11.75" Rear BBK, 15mm Spacers, Wheel Studs, JCM Modified Intake, MM Filter, Gauges
I just read in another NAM post that P0326 can also be set off by low fuel pressure and that a loose gas cap can trigger a low fuel pressure indication. Maybe your gas cap was just a little loose and it had nothing to do with the knock sensor.
However, there are also a few posts in the NAM Gen 1 Stock Problems/Issues forum about bad knock sensors.
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2006 MCS JCW GP #1405: Adj Front Camber Plates, 19mm Rear Sway Bar, MM Front Lower Brace, Milltek Cat-Back, TCE 13" Front/11.75" Rear BBK, 15mm Spacers, Wheel Studs, JCM Modified Intake, MM Filter, Gauges
"GP" 0256 >>RMW ECU Tune, Ireland Camber plates, M7 Strut Bar. EBC red pads, ITG filter,TSW Engine Mount. Detroit tuned Tensioner stop.
