I want to make sure its right. What is the measurement of vacum for my 98?

 

varies by throttle position and rpm.

 

OK how about at idle.

 

Varies by your atmospheric pressure. What kind of readout are you looking for? mm/Hg?

 

Yes mm/hg. Not trying to be a dick but I'm getting aggravated. What is the stock vacum. I'm am trying to make sure evrything is ok with my car. Seems to be, I jsut had my gauge sitting here and would like to check it and make sure everything is OK. It sits at 21mm/HG at idle and when I hold the throttle down it goes to around 20. Are these numbers sounding correct to you.

 

Think about it for a second... with the car set to on, but not running, your MAP sensor is still working. 1 ATM is standard pressure, but like I said it varies by weather condition and location so check your local weather for baraometer readings, is 760mm Hg. When you floor the car it should read almost pure vacuum. You figure out the rest, if you can't there was no point to installing that gauge.