After doing a tuneup on my caddy, I start getting the E39 code. Wasn't getting it before. I changed the ISC motor (was getting E30), plugs(got ac delco), wires, coil. I didn't put a new distributor cap or rotor on because they looked fine. What could be making the engine miss? Is the miss aslo related to the E39 code. By the way I also did not pass emissions here in Tennessee. Said my hyrocarbon level was 1181 and it should be 220 or less.