I watched your video about lack of spark or lack of gasoline for an engine that cranks but does not start and then wondered about the Check Engine Light. According to the video, the no-spark scenario is associated with the crankshaft sensor. What about the camshaft sensor? I have a similar intermittent no-start problem. I am going to now replace the starter. I have replaced the spark plugs and four ignition coils. My temporary solution is to disconnect the battery, disconnect the ignition coils from the spark plugs, hard tap on the solenoid on the starter, remove and re-install the the PC valve, remove the air duct to clean the throttle - then the engine will start 4 or 5 times before I repeat that process. The Check Engine Light does not illuminate. Thank you for the website. 2007 Kia Rio

MECHANIC TIP: Method to Remove Ignition coil connectors for 2007 Kia Rio, Manual Transmission, Base Model.

The clips on the connectors for the four ignition coils should be pressed inward to release the tiny latch that is holding the tiny hook on the ignition coil. A simple method is to use a shop towel to protect the connector by wrapping the shop towel over the connector and to then use the side of the metal end of a screwdriver, such as a small Phillips screwdriver, to press into the clip while also using a pair of channel lock pliers to push the side of metal screwdriver to press the clip and while also simultaneously pulling the connector away from the ignition coil. The tiny black tab, which is behind the clip on the side of the connector, must be pulled out from the end of the connector before the clip can be pressed with the side of the metal Phillips screwdriver to release the connector. --------------"The one clip on the side of the connectors for the four ignition coils (above the spark plugs) should be pressed inward to release the tiny latch that is holding the tiny hook on the ignition coil. A simple method is to use a shop towel to protect the connector by wrapping the shop towel over the connector and to then use the side of the metal end of a screwdriver as a tiny rod, such as a small Phillips-head screwdriver, to press into the side of the clip while also using a pair of channel lock pliers to push the (tiny rod) side of the metal screwdriver to press the clip and while also simultaneously gently but firmly pulling the connector away from the ignition coil. The tiny black tab, which is behind the clip on the side of the connector, must be pulled out from the end of the connector, such as by prying (pulling) with a metal spatula, before the clip on the connector can be pressed with the side of the metal screwdriver (tiny rod) to release the connector. The concept is to use the tiny rod on the channel locks to easily push the clip inward on the connector. The clips could be easily broken and may not be pressed enough by only using a finger. The channel locks are sturdy. And, the method was easy and simple.. 2007 Kia Rio, Manual Transmission, Base Model.

The channel locks are secure and easy to use to pull the connector away from the ignition coil. Thank you for the website!

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user456101
user456101

Shrodinger's Box does a comprehensive treatment of Crank, No Start