hey all... lately when i start the car it will start fairly quickly but as soon as it does the rev dies down very low then back up to normal running idle, this happens as soon as it starts and only lasts about a second.. and sometimes when the car is idling it will rev up to at least 2500rpm by itself and then dies down after 1-2 seconds, so i decided to do a code check and got 12 then 36 then back to 12... after searching on here ive found that 36 isa vacuum leak.. any idea where i should start looking for that? any help would be good as im about to head down to melbourne for a few weeks (about an 8 hour drive).... cheers guys..
checked all the hoses and stuff around the intake manifold and throttle body but everything seems to be as it should.... where else should i check? brake booster maybe?