Bump.
I wouldn't think there would be an issue with too much air getting anywhere unless maybe you're boosted. Under normal operation, the piston moving down on the intake stroke will pull in a certain amount of air. It's just easier for the engine to pull in air.


Really putting thought into doing this to the Bravada. Will probably do it next weekend when I can get another throttle body gasket. I can clean the tb while I'm at it.

 

Actually when I first did it my blazer ran really rough when I first started it then ternd it off and back on and its fine. also keep that in mind also if u do anything where u need to disconnect the batt have to do that over again

And that's what the IAC is for it adjusts everything in the car to run properly

 

Does doing this mod affect the fuel milage? i have a 99 LS Blazer 4 door

 

After reading up on this mod I'm thinking about just cutting a third of the diffuser plate off. Does anybody want to guess how much and where to cut that would impact the EGR the least? Instead of trimming evenly I could trim just the middle or ends. Maybe drilling a few holes in it would create enough tubulance to give a better mixture. Just some guesses but what do you think?

 

now that youve driven a decent amount. Have you noticed any change in fuel economy?