hal1992 Posted December 14, 2010 Report Share Posted December 14, 2010 I have a 1992 seville that has the check engine light on. After troubleshooting with my chilton's manual I have a code eo30 and eo98. I removed the ISC motor and took it apart and found no gears damaged. So I cleaned and greased and installed back on engine. I don't understand how to do the ISC adjustments. I am confused a bit about how to check the 13.4 degrees with ISC plunger extended. Will the 13.4 show on ecm override mode or on inputs or outputs? Also how do I check the volts of -0.5 - +0.5 on the TPS ? Link to comment Share on other sites More sharing options...
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