normal lsj vacuum?
 

at idle its at 20 lbs vacuum. cruising in gear off throttle at 28 lbs vacuum. hold rpms up slightly while stopped and it drops slightly below 20 when i let off gas then goes back to 20. i dont know if its normal for the car. i posted a day ago n the reply i got was pretty childish.. i just wanna yes or no answer as to if this is normal for a lsj.. i dont really need direction for finding the issue, just need to know if there is a issue. i appreciate any ideas on what it could be but am not counting on it. thanks