My daughters kia rio 2004 is hard to start when it is running a spark can be seen in 2 spots arcing from coils where spark plug leads attach back to body of coil base

.044 in.

If you google your question you will find some excellent forums and info on fixya links.

You need a spark, Fuel, and air to make it run. if it will start period i would check to see if your getting spark (Sparkplugs) Or if you are getting fuel. May be a bad coil of plug or a dirty fuel filter.

With the engine codes! Could it be faulty or blocked fuel injectors?

The car computer does the firing of the spark plugs based on info provided to it by various sensors in car. Your mechanic is spot on. Ouch!

Have you replaced the spark plug leads? If not I would renew them

could be a bad coil pack or the connector is oxidized

These are coil packs,the most likely problem will be the crank sensor,or the cam sensor,these are what trigger the pulse for spark,and injector pulse.

the coil pack mybe bad

INSPECTION

1. Disconnect high-tension code from spark plug.
2. Remove the spark plug.
3. Connect the spark plug to a high tension code.
4. Hold the spark plug with insulated pliers 5~10mm from a ground.
5. Crank the engine and verify that there is a strong blue spark.
If there is no spark, inspect the following points.

Step Inspection Action

1 Check for good connection of ignition coil Yes Go to next stop.
No Repair or replace
2 Check if resistance of high-tension leads are OK Yes Go to next step.
No Replace
3 Check if the ignition coil is electrically charged
1) Ignition switch "ON"
2) Check if the engine coil (+) is electrically charged
Yes Go to next step
No Check the wire harness between ignition switch ignition coil and ECM
4 Check if resistance of ignition coil is OK
Resistance
Primary : 0.36~0.44Ω (at 68°F (20°C))
Secondary : 10.9~13.3kΩ (at 68°F (20°C)) Yes Go to next step
No Replace
5 Check if ECM is OK Yes
No Replace

REMOVAL

Do not attempt any maintenance on spark plug if engine is hot.
1. Disconnect negative battery terminal.
2. Carefully remove high-tension leads.
3. Use compressed air to blow any dirt or debris from around spark plug hole.
4. Check that spark plug fits squarely in spark plug socket and remove spark plug.

Raise a vehicle and install SST(OK552 131 001) in order to replace cylinder 2, 4, 6 spark plug.

INSTALLATION

1. Install spark plug into cylinder head.

Tightening torque : 18~22lb-ft (25~30N·m, 2.5~3.0kg-m)

2. Reconnect high-tension leads.
3. Reconnect negative battery cable.

replace it