Help Car teouble

[MazdaRider]

ok guys this is my problem
i have had my CAI 4 a while
its 3inc tubing ok an every time i floor the
gas the rpm drops below 1000 and sonuds like it wants 2 die
everyone thinks that its my intake i might have a leak
but i dont everythings tight
but once over 4000 it revs hard an loud
can any one help???????
Thanks

[Ryan]

sounds like vac leak to me.

[Daninski]

Sounds like a getto grasp of the english language.

[MazdaRider]

vac leak where i got a vac guage an it
dont show a leak
or is it too small 4 the guage to catch it

[Bumpysbro]

usually a 4 cylinder is about 16-18inches of vacuum at idle, should be steady and not drop or move around too much. and should drop suddenly when you snap the throttle open to about 2-1inches and should shoot back up passed 16inches when you close the throttle like on deceleration. i mean you could have a leak after the MAF/VAF sensor and lets in metered air and wont have enough fuel to compensate.

[SuperK]

the only thing I know is the EGR and O2 shut off at around 3700 and 4k revs.

[MazdaRider]

when closed the guage reads 20 on vac

[Dark_Rider2k3]

check your VAF? How did you disconnect it btw? (when you installed your CAI)

[MazdaRider]

whats the btw???????

[SuperK]

btw = by the way

[Redline322]

It sounds like the initial drop off is because of the larger intake, I think people usually go for 2.5" tubing for 4 cyls. I had a similar issue when I made a short ram intake on my 323 a while ago and I just advanced the timing a bit on the distributor and adjusted the idle screw so that I was up about 200-300rpms from stock and the problem disappeared. This is caused by the vaf because the door is closed over at idle and the only air is getting through the bypass built into it and once you hit the throttle, door opens due to no leaks and proper vaccuum, but there isnt enough volume of air inside to fill the space and the car lags for a moment.