Engine
Engine Problems
Rough running, misfires, power loss, noise and warning lights.
Engine complaints cover everything from a barely noticeable stumble at idle to a hard failure that leaves you on the shoulder. Most of what drivers experience day to day comes down to four things: air, fuel, spark and compression. When one of those is off, the symptom you feel — shaking, hesitation, a check engine light — is the engine telling you which one.
The good news is that modern engines log their own evidence. A misfire on cylinder 3 sets a P0303 code long before the shaking gets bad enough to worry you. Pulling codes first turns a vague complaint into a specific circuit to test.
One symptom is worth singling out because so many people misattribute it. If your car jerks or bucks when you accelerate, the instinct is to suspect the transmission — but it is far more often fuel, spark or an air leak. Car jerks when accelerating sorts the causes by exactly when the jerk happens and includes a free thirty-second test that rules the transmission in or out before you spend anything.
Engine Problems problems
- Critical
Car Overheating
Temperature gauge climbing into the red, steam from under the hood, or a coolant warning — almost always a leak, a stuck thermostat or a fan that stopped working.
10 min read
- Moderate
Car Shakes When Idling
Shaking that appears at a stop and smooths out on the move usually traces to a misfire, a vacuum leak, a failed motor mount, or the idle-control system losing its target — four different repairs at four different price points.
9 min read
- Moderate
Car Jerks When Accelerating
Most people arrive here worried about the transmission. Usually it is not — jerking under acceleration is far more often an engine fuel, ignition or air problem. This page sorts the causes by exactly when the jerk happens, so you know which repair you are actually facing.
12 min read
- High
Coolant Leak
A puddle under the front of the car, a reservoir that keeps dropping, or a sweet smell after shutdown. Where the leak is matters far more than how big it looks — and the honest answer to "how far can I drive" is not a number.
14 min read
- Moderate
Engine Oil Leak
A dark puddle where you parked, a burning smell, or a dipstick that keeps reading low. Finding out whether it is leaking from the top or the bottom of the engine narrows the answer faster than anything else — and the cost depends almost entirely on which gasket it is.
14 min read