First off, I dont know if this belongs in here, so sorry if this nees to be moved. My car ran fine and idles with some vacuum with the stock heads. I put the afr 210's on, with the lt4 intake and 58mm throtle body. Now the car runs like 8 inches or pounds (cant remeber which one they measure it in) at idle. The car is a 95, and it throws a code 33, low map sensor voltage, ie low vacumme. I do not have any vacuum leaks, becasue the car idles steady, and one would think that the idle would be all over the place if it had any ummeetered air coming in somewhere. Is this just the name o the big cam big head stroker game, or is something wrong? Can this be taken out with tuning? The cams duration is 242 248, with a 114lsb. The idle is set around 925, well so that is what the laptop says it idles at. Any hepl would be appreciated.

 

Moving to LT1 Engine Tech.....

 

anyone?