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12 Typical Reasons Your RPM Goes Up and Down While Parked

RepairSmith

Here’s how a mechanic would address RPM fluctuation: Perform a visual inspection: They’d check for damaged hoses, broken wires, or any wear and tear in the engine compartment. Check for engine codes: They’ll check for any check engine light diagnostic code that can help determine which parts need cleaning, repairs, or replacements.

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BMW X3 Common Problems

Alex's Autohaus

When this happens, a software update or reprogramming will often solve the problem Electrical Issues Electrical issues are not uncommon on the first generation X3. When this happens, the VANOS system will not function properly, causing a check engine light, loss of power, and rough running.