I have a 1992 Oldsmobile Ninety-eight Elite. It just recently had an oil change and fluid check, and had the engine air filter replaced. A few nights ago, the check-engine light came on. Nothing about the car seemed different at this point, except that the previous month I would get intermittent whiffs of exhaust when running the heat (either for myself or to de-fog the windshield).
Today, I was about to head home from the store and had to de-fog the windshield… and the car stalled while trying to leave the parking lot. I started it up again, but then when I went to drive forward the car stalled again. It did this a few more times. I put the car in neutral and pushed it backwards to get out of the way of other people, started it up again and turned off the heating system before shifting gears, and this time the car was fine. It did stall again briefly while waiting at a traffic light, but then thankfully started up and got me the rest of the way home.
Once home, I spoke to a friend about this who used to fix cars back in the 70s and 80s, and he says it sounds like the filter for the heating and air conditioning system, which is different from the engine air filter. Could my friend be correct? Is there a more likely explanation? (I’d take the car in to have the check-engine code identified, but Auto Zone can’t read OBD codes prior to 1996, and money is a little tight right now). Again, nothing else sounds or feels different.