'07 V-8, 2WD 4-Runner cranks but, intermittently, will not run until....

I press against a connector at the front of the engine which appears to be a part of the circuit that activates the individual coils for each spark plug. The connector does not seem loose and may be missing a cover.... or not.

This has happened 4 or so times . Thus far, simply pressing against the front of the connector before turning the key has been reliably successful in starting the engine. This problem is occurring with increasing frequency.

I have yet to look for a code and the check engine light has not come on.

Ideas?

 

I would replace the connector, it is shorting out/loosing connection.

 

Thanks AuSeeker. Cleaning contacts and, perhaps, replacing the connector are the first couple possible fixes that come to mind. I have some reluctance to attempt to disconnect the connector given: 1. the absence of any apparent looseness in the connector and 2. knowing that a 15 year old plastic connector is a brittle, delicate item especially given its proximity to the engine. I'm hoping to learn from others with similar symptoms/experiences to help determine my course of action. This car is not my daily driver so I have the luxury of time to gather information.