I have a 2004 Deville base (110K). It had an over heating issue when I got it for next to nothing. I thought at first it passed the block test but I re-tested right after an over heat issue. Color changed slightly. My thoughts are to repair it since its in such good shape.I have been running it on short trips to town and back on colder days. 3 Miles at best.
This past weekend I pulled in the driveway and shut it off. I heard something running/buzzing under the hood or a sound like that. At first I thought it was the cooling fans but they didn't appear to be turning. I let it sit with hood up and walked in the house. When I came back out I could smell something electrical. Then I noticed a bit of smoke, not much, coming up around the air box. The noise was gone. I disconnected the battery. I thought at first it was coming from the ECU. But how could the ECU make the noise I heard? I took the air box apart. The ECU looked OK and wasn't hot. No melted wires. I left the air box out and set the ECU on a small board. I had other things to do.
This morning I connected the battery and it started up and I drove it around the yard. No codes. I didn't let it heat up. I thought if the ECU fried it wouldn't start. I'm not sure where the issue came from now. The ABS is below the air box and there is the cooling fan on the drivers side. Unless it was something else. I will start it and turn AC high to make sure both cooling fans running ok. And also check battery voltage running.
This past weekend I pulled in the driveway and shut it off. I heard something running/buzzing under the hood or a sound like that. At first I thought it was the cooling fans but they didn't appear to be turning. I let it sit with hood up and walked in the house. When I came back out I could smell something electrical. Then I noticed a bit of smoke, not much, coming up around the air box. The noise was gone. I disconnected the battery. I thought at first it was coming from the ECU. But how could the ECU make the noise I heard? I took the air box apart. The ECU looked OK and wasn't hot. No melted wires. I left the air box out and set the ECU on a small board. I had other things to do.
This morning I connected the battery and it started up and I drove it around the yard. No codes. I didn't let it heat up. I thought if the ECU fried it wouldn't start. I'm not sure where the issue came from now. The ABS is below the air box and there is the cooling fan on the drivers side. Unless it was something else. I will start it and turn AC high to make sure both cooling fans running ok. And also check battery voltage running.