1994 Cadillac Eldorado Q&A
1994 Cadillac Eldorado Question: ISC moter
You need to inspect the Idle Speed Motor, the internal position sensor is not detecting that the tip is extended all the way. As for your Check Engine Light, that may be due to the Idle Speed Control motor or some other things as well. Only way to know is to retrieve the code(s). - dandd
po30 is the code for isc moter rpm out of range in which my car has a fast idle plus the isc moter makes a clicking noice eve...