91 4runner vacuum leak or ???

[vergotex3]

i have a 91 4runner with the 3vze having problems redid the head gasket a month ago runs but it runs rough at first i thought it was a misfire so put new spark plug and wires runs the same found out that when its running if i take the oil filler cap off the engines idle seems to lower so i thought it must be a vacuum leak all the hoses seem and go where they should so im pretty lost at this point any info appreciated thanks

 

[willyt4r]

smoke test

A smoke test will fond that leak. In my case it was an air intake manifold gasket:girl:

 

[vergotex3]

A smoke test will fond that leak. In my case it was an air intake manifold gasket:girl:

how do i get my engine smoke tested and how much is it , is there anyway to do it myself