If a car turns over but does not start, it has a problem with compression, ignition or the fuel to air ratio. Determining which of these three areas is responsible for the problem is the first step in troubleshooting, according to the Linn-Benton Community College.Know More
An engine experiencing low compression does not increase the temperature of the air and fuel mixture enough that it burns. There are several reasons cars experience low cranking compression, such as a slow turning starter motor, improper sealing of the cylinders or a broken timing belt or chain. An experienced mechanic is often able to determine the problem by listening to the engine as it attempts to crank.
In order to operate correctly, the ignition system provides a spark to ignite the compressed fuel and air mix. A spark tester helps to determine if the ignition is providing sufficient spark to start the engine. If the engine produces spark but does not start, the problem is often improperly installed plug wires. Following the manufacturer's firing order helps to resolve the problem.
An improper fuel to air mix prevents engines from starting. A bad fuel pump or filter limits the amount of fuel entering the cylinders. A plugged air filter makes the mix too rich for the car to start.Learn more about Car Parts & Maintenance
A car can hesitate or stall while going uphill for a number of reasons, but typically the problem occurs when the engine's valves and rings are worn. Because driving uphill puts the engine under additional stress, less compression is dispensed, which weakens the engine over time. Stalling can also occur when the engine's sensor no longer works.Full Answer >
A smell of sulfur coming from a car's exhaust pipe is a good sign that there is a problem with the catalytic converter, according to Cars Direct. The smell, similar to rotten eggs, indicates that the sulfur present in gasoline is not being converted to odorless sulfur dioxide.Full Answer >
There are many reasons why a car starts but does not stay running, but one of the most common causes of this problem is a bad fuel pump. When a fuel pump is going out, it is common for a car to stop running abruptly when the fuel supply becomes restricted.Full Answer >
A car that starts up initially but dies immediately thereafter is experiencing a problem with either its carburetor or fuel injection system. The culprit depends on the year, make and model of the vehicle in question. Carburetors are easy to fix, while fuel injection issues cost a large sum to diagnose and repair.Full Answer >