Often, the engine is running at a suboptimal temperature.

One place to start is at the website of the Insurance Institute for Highway Safety.

A replacement (valve, not vehicle) should cost about $100.

‘Hand-tight, plus a little more’ is the way to go.

The biggest issue is that you’re wasting fuel and creating more pollution.

Find a mechanic who is willing to take it a step at a time.

It’s just like backing your foot off the gas pedal.

The latter may be preferable to paying the high cost of repair.

If it’s not the relay or the motor, it could be a poltergeist.

Usually, just the threat of a lemon law case will make a dealer pay a whole lot more attention.