Hi folks. Our Jag (xj6 s3 1985) has difficulty starting first time of the day. It will crank and drank and crank and finally fire over after about four or five ten second turns of the ignition key. After that first time, it will run pretty fine and start again for the rest of the day (unless there's about 6 hours between starting the engine).

This is Queensland Australia so we aren't talking cold.

Our Jag mechanic showed us a trick: disconnect and reconnect a lead going to the cold start injectors - you hold it together and manually fire the cold start injectors when the fuel pump is going (you can hear the fuel - ignition is on) by ''clacking'' the bullet connector
together. Do that for 10 seconds or so and turn the key and vroom up she starts. As demonstrated in this video.

But it's a pain.

Have people heard of this trick? What's going wrong here? Do I need to fit new cold start injectors or something? Mechanic claims he can't find what is wrong with it.

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