1995 Blazer 4.3 v6 Vortec CPI bad map sensor?
 

my map sensor is reading 29 hg with engine off and I am about 800 ft above sea level is this a high reading or a normal reading for that map sensor wondering because when I am at WOT my engine hesitates and then acts like it has a power band in it lol and slowly gets power back again. when you go up a steep hill or pass someone you hold it wot the engine hesitates for a few seconds then slowly gets its power back. trying to figure out what is causing this hesitation sometimes it runs fine has all the power sometimes it don't