Starts out low then louder
Jaguar Q&AAsk Your Question
2004 Jaguar X-Type Question: Car makes whistling sound about 5-10 seconds then may not hear again for 10-15 m
Answer #1bmdouble November 30, 2013, 18:30Master
does it make the noise at idle in park or in gear or when driving down the road?
Answer #2dhuizar April 16, 2014, 08:36Rookie
Had same issue.could be one of 2 things. Check vaccumm line that connects from top of intake manifold to master cylinder. Mine for some reason appeared to corrode. Or check both of the bank o2 sensors located on passenger side of intake manifold (black round disk looking things) orings go bad. Good luck!