I’ve got two strange noises coming from my Cayman –
1. I get a “clunk” every now and then when I run over a bump, tar strip, etc. It sounds like it is coming from the rear hatch. This is not a
PASM car . . . just a stock Cayman. Is it the same “clunk” that’s in the poll?
2. There is a rattling sound when I back off the accelerator. It sounds similar to an engine knock but I’m not accelerating. I’m backing off the gas. I don’t notice it so much when I am in 4th or 5th gear. It is quite noticeable when I am in 2nd or 3rd.
Are these sounds normal? I had a Boxster S several years ago and I do not recall the engine noise. (Of course the Boxster wouldn’t have made the rear hatch sound.)
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PASM - Porsche Active Suspension Management
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This active damping system offers continuous adjustment of individual damping forces based on current road conditions and driving style.
The driver can choose from two setup modes, ‘Normal’ and ‘Sport’, using a separate ‘damper’ button on the center console. ‘Normal’ mode is designed for general road driving and circuits with uneven tarmac. ‘Sport’ mode is intended for smoother track surfaces, where the harder settings help eliminate pitch and roll.
In either mode, PASM continuously evaluates the current conditions while automatically selecting the corresponding damper rates from the respective set of mapped values.
A range of sensors are used to monitor the movement of the body under acceleration, braking and cornering maneuvers, as well as on poor road surfaces. The PASM control unit then evaluates this data and modifies the damping force on each individual wheel in accordance with the selected mode. The result is a significant reduction in body movement as well as a better grip on the road.
For example: if ‘Sport’ mode is selected, the suspension is automatically set to a harder damper rating. If the quality of the track surface falls below a certain threshold, the system immediately changes to a softer rating within the ‘Sport’ setup range. When the quality of the tarmac improves once more, PASM automatically returns to the original, harder rating.
Need more information about PASM? Click this link: FAQ for PASM |
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