About every 6th try the starter does nothing. If I hold the key in start position the starter kicks in an 10 to 15 seconds. Otherwise it starts normally. Even when there is a delay the starter sounds perfectly normal. Thanks

not uncommon for older soobs to need denso starter solenoid rebuilt, parts are not pricey - contacts and maybe the plunger.

Year, Model and Transmission auto or manual?

If the starter solenoid does not click, then it is not getting voltage or not enough voltage from the ignition switch start contacts, through the inhibitor switch for automatic or a relay for manual. If the car has a security system that adds another relay to the circuit.