Hello. I just purchased a 1982 Eldo with 59000 miles and a 4.1 V8. The only problem is that if I drive the car for 15 or 20 minutes, then shut if off for 5 or 10 minutes, it doesn't want to start back up. I let the car sit for a while, and it fires right up and runs ok. It also seems to be real sluggish (surge in and out) while taking off from a stop. The little old lady that I bought the car from took it to the local cadillac dealer to have it looked at for this, but unfortunately for us most of the tech's there are younger than the car and have no idea what to do with something this old! I ran the codes (something they did not know how to do) and only came up with a code 30 (ISC RPM Out of Range). Any suggestions? Thanks.