I was coming home from work tonight... about a 15 mile commute down the interstate. As I was rolling down the off ramp the car suddenly bucked for a second and the check engine light came on. It immediately smoothed out but the light stayed on. As I continued the last 3 miles or so to the house it became worse again, bucking for a few seconds and then smoothing out. The idle at stop lights seemed normal but then it would start bucking again. The check engine light would come on and stay on for a little bit, then turn off.
When I got to the house I left the engine on and looked under the hood but didn't see anything. There was no smoke at any time; nor did I smell any raw fuel.
After a couple of hours, I decided to take another look. Just on the off chance it was caused by the fuel cap, I loosened it and retightened it. There was no suction sound when I opened it... which I generally get when I open it at gas stations.
I went ahead and started it again and it ran smoothly. No check engine light this time. Anybody got any ideas?
BTW, does anybody know where the OBD connector can be found on this wagon?
PS - it's been one damned thing after another with this car. If I hadn't have gotten it for free I'd really be upset.