Can i set load priority of wordpress plugins

Merge of two wordpress plugin and Create New but problem of priority.

Plugin_1 - That import product from Ebay

Plugin_2 - Automatic post product to social sites.

Problem Occur: Image not Come because of plugin_1 load take time that time plugin_2 post data social website.

So can i set priority ? I have also given plugin_2 save_post hook priority but not worked.

Loader.php As under

include_once(dirname(__FILE__) . '/Plugin_1.php');
register_activation_hook(__FILE__, array('Plugin_1', 'install'));
register_deactivation_hook(__FILE__, array('Plugin_1', 'uninstall'));  

include_once(dirname(__FILE__) . '/Plugin_2.php');
register_activation_hook( __FILE__, 'Plugin_2' );
register_deactivation_hook( __FILE__, 'Plugin_2' );

Suggest me if any way.

Thanks.

via Chebli Mohamed