My car speedometer is 3-5 mph slow depending on how fast I'm going. So i figure that means my odometer is off by about 2 miles every 20. I've been getting about 24 mpg but that is probably closer to 22. I do mostly freeway driving though so even if its idling high, I'm pressing on the gas pedal to m...

Hi, I have a 1987 Volvo 240 station wagon and I've been having some engine problems. It started last summer when it started to have a really fast idle. I shut the car off to stop the high idle and it wouldn't start again after that. It tried starting and turned over until it would start really rough...