Originally posted by blugsr98
for this statement:

"A vacuum meter is used to monitor the amount of negative pressure (suction) in the intake manifold. A vacuum meter reading is used to diagnose a variety of engine problems, from a blown head gasket to worn valve guides. It also can be used to monitor fuel economy, with high vacuum readings indicating good fuel economy and low vacuum readings indicating poor fuel economy."

now im quite confused, how come both of us (raijuta and myself) are getting good result in terms of fuel economy with the low vaccum reading as compared to high vaccum reading before installationor khaos? any idea?
...so you still did not answer my question, how did your "dealer" measure your pressure? From which point in the engine did he get the data? Vacuum pressure changes as you rev up (or down) your engine. Could it be the dealer was just "pulling your leg" when he showed you the meter readings since you said its a steady 2inHg in whatever RPM your engine is in? He (installer/dealer) always could have crimped close the vacuum tube to make the meter give false readings.

I would rather have you take a picture of your engine bay with the details of the installed device in focus and post it here so we can all see. Other than that, I will just deem it as more "dealer talk".