Went out for a test drive after putting this cam, headers and a Borla adj. catback on. It idles at about 1k, but after taking it around the block I pull into the driveway and it's only idleing at 400 rpm then goes back to a 1k idle after a few sec.

 

My guess is vacuum leak.... Brake booster, ports on the drivers side of intake manifold. Try starter fluid to seek for the leak... It doesnt have to be big at all.

 

Whats the best way to check for vaccum leaks ? ....... thanks

 

I'll give it a shot... thanks