Common engine problems, causes and solutions

Common engine problems, causes and solutions

Petroleum gum, varnish, and harmful deposit form

As vehicle fuel becomes heavy and sticky as it grades, harmful gum and varnish deposits form naturally. Every engine suffers from gum and varnish problems.

Fuel and oil flow through the engine is restricted by these deposits, which puts stress on engine parts and causes performance problems.

These problems build up and cause parts to wear out prematurely over time.

The easiest way to prevent engine problems is by cleaning gum and varnish from your fuel and oil systems.

7 Common Engine Problems

Each of these 7 listed common engine problems can be avoided or reduced by the use of polytron in your fuel and oil regularly, to clean your vehicle engine to prevent harmful residues and deposits.

  1. Hard starting

Hard starting is when your engine no longer starts easily on the first turn of the key, or you need to pull a small engine start rope more than two or three times. A healthy engine fires and starts immediately.

Common causes: Dirty carburetor, clogged fuel filter, leaking fuel pressure regulator, dirty fuel injectors, and failing ignition parts (coil, spark plugs, and plug wires).

     2. Rough idle

The rate an engine runs while parked or without pressing the gas pedal or throttle is known as Idle. Most car and truck engines idle steady at 600 to 1200RPM. Rough idle occurs when your engine feels shaky, sounds unsteady, or gives a sense of being out of rhythm.

A healthy engine idles smoothly and quietly.

Common causes: Dirty fuel injectors, dirty carburetors, bad spark plug or plug wire, and vacuum/air leak.

     3. Engine stalls

A stall is when an engine dies out when it’s supposed to be running, though the engine may start back up again. Stalling means that the engine is not getting enough fuel or airflow. A healthy engine never stalls.

Common causes: Clogged fuel filter, dirty fuel injectors, dirty air filter, bad spark plugs or coil.

     4. Hesitation

An engine with a hesitation problem will lag, stutter or stumble when you press down on the gas pedal or throttle. Hesitation can be any delayed power response when you need to accelerate.

Common causes: Clogged fuel filter, bad fuel, dirty fuel injectors, vacuum/air leak, weak fuel pump, and, failing ignition parts (spark plugs or plug wires).

     5. Loss of power

Loss of power occurs when an engine still runs but does not work as hard as it should. Power loss is usually noticed when going up hills.

Common causes: Clogged fuel filter, dirty fuel injectors, weak fuel pump, dirty air filter, and failing ignition parts (coil, spark plugs, and plug wires).

    6. Loss of MPG

Poor fuel mileage describes a situation where your car or truck is not running as efficiently as it should. The fuel economy is poor.

Common causes: Using the wrong motor oil, dirty air filter, dirty fuel injectors, bad spark plugs or misfires, low tyre pressure, and chamber deposits (pre-detonation, pings).

   7. Bad fuel

When exposed to oxygen, fuel degrades (as it makes it unstable). Gasoline suffers from the evaporation of light ignition vapors necessary for healthy combustion.

Your engine may run poorly If your fuel is old or bought from an unreliable source.

Common causes: Engines that sit too long (varnish), water contamination, contaminated gas station fuel, vented fuel tanks, or storage containers that sit too long

Helpful checklist

When figuring out an engine problem, here is a checklist of the most common parts and issues to look out for.

You can use these keywords and problem descriptions as a starting point for talking to a parts store, a mechanic, or learning how to work on your vehicle yourself.

Fuel filter: This should be replaced every year for diesel vehicles or 2 years for gas engines. Is your fuel filter clean and new?

Ignition coil, spark plugs, and plug wires: If your car or truck has over 100,000 miles, have you replaced any of your ignition parts?

Dirty intake valves: Don’t let carbon deposits form on your intake valves. You don’t need to be an expert to clean your own intake valves.

Fuel pump: A fuel pump can last over 200,000 miles. Checking fuses, voltage, or testing fuel pressure are low-cost ways to keep tabs on your fuel pump. A clogged fuel filter will wear out a fuel pump prematurely.

Air filter: Is your air filter clean and new? An air filter should last 15,000 to 30,000 miles.

Is the gas cap tight or free?: ‘Check engine light’ may be on because you didn’t turn your gas cap tight.

Vacuum/air leaks: On YouTube, you can find lots of do-it-yourself methods on how to find a vacuum leak.

Low tyre pressure: If you notice a drop in MPG, check your tyre pressure first before you start looking into other causes.

Check engine light: Read your engine code.

Oil restrictions and oil-burning: At every interval pour a can of polytron into your oil crankcase.

Author: Greg