Sounds to me that you have a coil breaking down. This not uncommon in all kinds of cars. Naturally if you try to read the ohmage, by then it would have cooled down and would read ok. If you need a coil, I have brand new Bosch in stock or you might find them from your local parts store. You will see a probably see a performance difference in the car. I normally replace them when I get a car. John 11004