2002 jaguar x type car starter

there is something wrong with your immobilizers bypass or the lack there of...... make sure your keys are not coded......

if u have install a bypass and and confirm that it is working properly, the other possibility is that the remote start may be sensing a voltage drop.. or possibly not getting a full tach signal if u have the tach wire connected.... if u are using a tach reference wire... also verify that u have a true tach...... hope this help.. lemme know if it doesn't...