I really need someone to help me :(
 

hi , I have Audi A3 1998 1.6 petrol 3 doors
when I start the car the Rpm keep play up and down and when I scanned it it shows an intake manifold changer over fault ( short circuit to earth ) ( n156)
and I have changed the change over valve but the problem still there .
I don't know what to do to fix that problem ???