My 1987 Mazda RX7 Turbo has an irregular idle.
When started up cold, it revs up to around 3K for a few seconds as they all do, but when the engine runs at normal temperature...the tach bounces from 1200 - 1500 RPM's consistently. I was told maybe a vacuum leak. A friend suggested that I spray carb cleaner all over the engine compartment to determine if and where there is a vacuum leak. Any other ideas or suggestions would be very welcome.