As far as I can tell from Chiltons....this is the Crankshaft Position Sensor. Which to the best of my memory is in the distributor, along with the Top Dead Center, and...some other sensor. NEWays, problem is the rotor bug seems to be fused to the distributor shaft and therefore cant get to the CKP sensor. Replaced distributor 2 years ago because old rotor bug broke and inside part was fused to that distributor shaft....anyone else have this problem....ways to keep if from happening/fix it w/out getting a new distributor? Thanks guys...

 

is it aftermarket, the new dist. is there red dust inside the cap

 

no red dust.....everything still stock distributor wise '93 H23A