What are some useful tips or tools to use. i know i went to ron's and i think he had propane and he was trying to use that to find one. i am just stuck, my car obviously has to have a vaccum leak, but i can't find it anywhere, i tightened up the crossover and put some quick weld around it as an extra preventitive. the car still idles like crap. i can hear a little hissing noise in the back of the engine, but can't find anything.
