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John

John 7/27/2020

2014 Kia Optima LX 4 Cyl 2.40L

Engine

kia optima hybrid won't start

replaced power relay assembly, start battery good, won't show "ready" and start

1 Answer


Jimm

Jimm 7/29/2020

If nothing happens when you turn the ignition key to the "Start" position, it means that the starter motor doesn't turn over the engine. Most commonly this could be caused by a low/dead battery or there is no connection between the battery and starter.
Check the battery and the terminal cable connections. If they look really corroded, you need to clean the battery posts and cable connectors or replace the cables and try to start the engine. Also check the starter. The solenoid attached to the top of the starter can fail, as well as the components inside. Replace starter solenoid, starter contacts, starter assembly or repair starter circuit as required.

If you turn the key to the "Start" position, but the engine won't crank; all you hear is a single click or repeated clicking coming from the engine compartment. Very often this could be caused by a low battery or poor connection between the battery and starter.

Check the battery and the terminal cable connections. If they look really corroded, you need to clean the battery posts and cable connectors or replace the cables and try to start the engine. Also check the starter. The solenoid attached to the top of the starter can fail, as well as the components inside. Replace starter solenoid, starter contacts, starter assembly or repair starter circuit as required.

Engine cranks over but won't start:
There are many possible causes, but we know it is neither a battery nor a starter problem. Just remember: a vehicle will always require air, fuel, and the ignition to operate.

Check the fuel. You may be out of fuel, or the fuel isn't getting to your engine. If the wrong amount of fuel is being injected into the combustion chamber, or being injected at the wrong time, the engine will not start. Again, this will be a case where the engine cranks over, but will not actually run. This could be caused by a few different parts including the fuel pump, fuel filter, fuel injectors, and fuel lines. Some of those options are a stretch, but do have an effect on the system. Start with the fuel injectors, and make sure they are clean.

If it's not a fuel problem, the electrical spark isn't getting through to the spark plugs. Check the spark. Without spark to ignite the fuel mix in the combustion chamber, the engine will not start. It will turn over or "crank over" but will never actually run. Spark issues are not limited to the plugs. Check the spark plug wires, the distributor or module, and plug gap. These all have a huge effect on the function of the ignition system.

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Jimm

Teddy B 7/30/2020

I'm looking at several You Tube Posts from around the world.

It seems the Dealers can not resolve much of anything on a Kia Hybrid.

Many Vehicles have been to 5 shops & several dealers & everyone is lost
& can only guess at what to do or replace, no one can afford that experiment.

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