wierd boost gauge guestion

[sr20tom]

When i start my car and it is cold, the greddy boost guage and the aem tru boost both read 0 for 20-30sec. The car revs and idles fine, the egt and inj duty cycles look about right what could be the cause of this? The car idles at -19.1 psi so that looks about right i guess when the gauges come to life. I also swapped the manifold back to the stoc one and now the ecar overboosts a little from 19 psi usual to 21psi. Can it be a vaccum leak?

[burnsauto]

could be. make sure the stock manifold is bolted down tight and check all other vacuum lines with brake clean. spray the lines, if the car studders - theres your vacuum leak.

gl.