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| 08-10-2020, 11:54 AM | #1 |
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135i 6MT RPM dropping with A/C
I have a 2011 135i Convertible with the manual transmission and I've noticed that when the A/C is on, the RPMs fall very rapidly while shifting compared to when the A/C is off. Has anyone else noticed this/is there a problem with the a/c or engine or a hose somewhere? The car isn't throwing any codes.
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| 08-10-2020, 12:17 PM | #2 |
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Enlisted Member
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Rep 42
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Sounds normal. My car does this too and I have a DCT. It's just a function of how A/C works on these engines. A/C is belt driven so it is using the engines power to run.
If you're tuned on MHD, you can raise your idle RPM to make the issue less prevalent. |
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| 08-10-2020, 03:03 PM | #3 |
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1Addict
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Yup. Pretty standard. Makes gear rattle/clutch chatter worse too.
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| 08-10-2020, 07:50 PM | #5 |
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Someone Else
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if we're only talkin ~200rpm then yeah, normal. if its closer to 4 figures there may be a problem...
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"Seats and a steerin' wheel" - N54 E82 135i | AR DP's | OSK DCI | VRSF CP | TS BOV | M̶H̶D̶ ̶S̶2̶ Stage 1| 2̶6̶0̶R̶W̶K̶W̶ (less)| 6MT | MPSS
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