I put over 5,000 miles on the convertible over the last two seasons and noticed decreased performance in both the engine and the transmission. In order to get a better idea on what the general condition of the engine is I did a compression test and although the results were very uniform the pressure was on the low side at just over 100 psi on all cylinders. All of the plugs had both carbon build up and were a tad oily which didn't surprise me as a puff of smoke upon start up was not...
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