i just swapped my d16z6 out of my 93 coupe and i put a d15bvtec in it and when it started as soon as i let off the clutch it makes a loud nasty rattling sound.. then when i press on the clutch it stays quiet.. and another thing my vtec is not working.. can it be that the solenoid doesnt work maybe i can just switch this one with the one off the d16??