The Car Sat for Months: What to Check Before You Drive It

A car that has been sitting — the second car, the one a student left behind, the one that came with the house — does not wake up the way it went to sleep. Most of the problems are small and predictable. A few of them get expensive if the first thing you do is turn the key and drive to work. Here is what to look at first, and what we check when we come out to a car that has been parked for a season.

Before you turn the key

1. 1Look under the hood for nests. Rodents love a parked car. Chewed wiring, a nest on top of the engine and acorns in the air box are all common in Charlotte garages and carports. A nest on the exhaust manifold is a fire waiting to happen on the first start.
2. 2Check the oil. Level and condition. If it is more than a year old, it gets changed regardless of mileage — oil absorbs moisture and its additives break down with time.
3. 3Look under the car. Fresh puddles tell you a seal dried out while it sat.
4. 4Check the tires. Pressure will be low, and they will have flat spots that thump for the first few miles. If the tires are more than six or seven years old, the sidewall date matters more than the tread.
5. 5Check the brakes. Rotors rust while a car sits, and the first stops will be noisy and weak until the surface clears. A parking brake left set for months may be seized — see our post on a stuck parking brake.
6. 6Look at the fuel gauge and think about when it was last filled. Modern gasoline degrades in months, especially with ethanol and Carolina humidity pulling water into the tank.

The battery

It is flat. A battery that sat fully discharged for months is often not recoverable, and even one that takes a charge has lost capacity. Jump-starting it and driving is a gamble: a badly sulfated battery loads the alternator, and a car that dies at the first stoplight is worse than one that would not start in the driveway. We test it under load before deciding whether it is a charge or a replacement. Our post on why batteries only last two years in Charlotte explains why a summer parked in the sun is particularly hard on one.

The first start

Turn the key to run and wait for the fuel pump to prime. Crank in short bursts rather than one long one. Once it starts, let it idle and watch for smoke, leaks and the temperature gauge, and listen for anything that sounds wrong — a rattle from the front, a squeal from a belt that has taken a set. Do not rev it. Let the oil circulate.

The first drive

Short, slow, and close to home. Brake gently a few times to clear the rotors. Feel for pulling, listen for the tires, and watch the temperature. Check under the car after — seals that were fine at idle can leak under pressure. Then, ideally, a fluid check and an oil change before the car goes back into daily use.

What we do on site

A wake-up visit is one of the more useful things a mobile mechanic can do, because the car is exactly where it has been sitting and there is no need to risk driving it anywhere first. Battery and charging test, a look for rodent damage, oil and fluids, brakes, tires, belts and hoses, and a scan for stored codes — then an honest list of what needs doing before it is a daily driver again. See our maintenance and inspection services.

Frequently asked questions

Should I drain the old fuel?

If it is a year or more old and the tank is mostly full, draining is worth it. A quarter tank of stale fuel topped up with fresh gas usually burns through fine.

The tires look fine. Do they need replacing?

Check the four-digit date code on the sidewall. Rubber ages whether it rolls or not, and a tire past seven years is a blowout risk on I-485 regardless of tread.

Where do you come out to?

Across Charlotte, Harrisburg, Waxhaw and the metro. Book a visit or call.

Serving Charlotte and Mecklenburg County. Call (754) 236-1714.