i have a 1987 Mercury Grand Marquis 5.0 85,000 mi. No major problems
until now it seems. The idle started to RACE. I could go 30 miles an hour without touching the gas. We replaced the idle control valve, but that didn't do anything to remedy the problem.
Before this happened we gave the car an oil change which included changing the air and oil filter.
I do not believe that it is an air filter problem. Could it be a fuel pump problem or some problem with a sensor?
I am not very knowledgable about cars, so any CLEAR and STRAIGHTFORWARD advice is very much appreciated!!