Yesterday as I left from work, my 86 Corolla (has a carburetor) which has run well for 200,000+ miles, started off real rough and would hardly back out of the parking place.
Then it picked up, but on the way home, it ran OK most of the time, but once on the interstate, going up a slight grade, it wouldn't get above 45 mph. Then when I tried to merge into traffic once, it wouldn't accelerate although I was giving it gas; after a few seconds, the car suddenly accelerated. It was about 40 degrees outside, and rainy.
I don't know if this makes any difference, but the gas was low.
After I'd been home about 20 minutes, it started up and ran as it normally does. Ditto for this morning (when the engine was cold), but the weather still cool and rainy.
Vapor lock maybe?
Thanks in advance for any input,
Ribeldi