I have a 2000 S2000. I was on the highway and hit the gas to pass when a puff of smoke came out and the engine stopped running. I coasted off the highway and had the S2000 flatbedded to a Honda dealer. They found that the #2 spark plug come loose and turned into two pieces of metal. The coil was partially burned up. A new plug and coil were installed and the car runs okay. The compression test was 165, 155, 175, 170 on cylinders 1, 2, 3, and 4 respectively. The car smokes a bit when reved and sounds different to me. I'm afraid to run it on the track. Does anyone have any advice? Should the head be pulled? Is the bottom end at risk?

 

something might and probably did break off and did damage to #2... your numbers also look kinda low for an s2k... how many miles???

 

who did the compression test?

 

um thats extremely low

 

I would recommend dropping the oil asap if not already. You can get an oil analysis done to see if any thing else had increase wear if you got debris in the oil.

Leakdown test will give you a better insight.