89 325i idle proplem

[bonujj]

Hi Guys.i have a 89 325i .it takes quite a few cranks to start. and after it starts
it idle for about a minute and shut off then it will take even longer to start again.
after 3 minutes of starting it will start , and while warming up after awhile it starts to rev up for few seconds then go down to idle speed it does it for severals times
till it warms up then it will idle fine,once in awhile while hot it will rev up again.while cold if you press on gas pedal it dies right out.i sprayed cleaner in maf did not help much.any idea on this one really appreciate your help.thks.