i just installed a cold air intake that goes down just in front of the tire, but it seems like my gas mileage went down, what could be the problem????

 

Heavy foot.

 

You're imagining things.

 

no not imaging anything, i usually get just under 400 miles to a tank, had to fill up today at 320 miles on this tank..idk it might be something else..im gonna do my head gasket and clean my IACV next week hopefully..it might just be my foot got heavier but i dont know

 

It's just one tank. There's no reason adding a CAI would change fuel econ.

 

maybe i got some crappy gas...ill find out on this tank i guess..also whats some more mods i can do to get better gas mileage? im trying to make a super high gas mileage car here bc i drive ALOT

 

Take the damn intake back off and restore it to stock.

 

Why are you doing a headgasket change? For fun? I hope it has failed.... Don't do a headgasket on maintenance intrevals... Unless you are taking the head off for whatever reason

CAI should improve economy. You probably have a heavy foot. My milage also varies 5 MPG seasonally. Especially if I warm my car up and start it a lot.

 

actually i think a CAi might actually improve econ slightly by removing a flow restriction. best way is with driving habits, however. not many mods will increase fuel econ, although all-motor mods that dont alter displacement dont seem to hurt

 

oops too late. 1hand typing FML so slow

 

my headgasket didnt go fully yet, but its leaking out oil on my block so i wanna do it, gonna put arp studs in while im in there as well..

 

Wait. So your headgasket has issues and you're wondering about a CAI? YOu don't think THAT might have something to do with it?

 

my head gasket has been like that since the day i bought the car, the car always had cam seal leak, (fixed) vcg leak (fixed) i just am waiting for my head gasket set and arp studs to come in so i can do the job, its not leaking worse or less than it did. but i noticed the slightly less mileage rite after i did the intake, and as for stuff to get better gas mileage couldn't i go with different tranny or gearing to have less rpms when on the highway to improve it?

 

head gasket blown thats leaking oil? i highly doubt that.

the cai should theoretically improve mileage but considering that your ecu is probably doing some minor adjustments and adding more fuel into your motor then that could be your issue but even then the difference is so minimal that you shouldnt have even noticed a mileage difference unless youre giving it more gas through the pedal.

i say its your driving.

also, as mentioned above, winter gas burns faster than summer gas so that could be another factor

 

well i already replaced my valve cover gasket, and cam seal because they were leaking, and the only place i see oil anymore is where the head connects to the block. i might be a noob on this forum but i'm not a noob too cars

 

check your distributor o ring first.

 

throw a d15 in there. 40+ mpg ftw.

 

Does the intake have little "bungs" to hook the vacuum lines back up? You may have left some unconnected.

 

man, you guys. a CAI introduces denser air into the combustion chamber. denser meaning more o2 molecules per cc. your o2 sensor reads the oxygen level in the exhaust and relays it to the pcm. the pcm then adjusts fuel injector duration accordingly.

simply put-denser air=more fuel
it's the reason why this is not considered "free" horsepower. it's also the reason why mileage stinks during the winter

to the op, you want better mileage, maintain what came from the factory well and you're set

 

all the vacuum lines are still connected it had the bungs for the hoses, and how do i check the distributor o ring? just pull off the dizzy?

 

its funny you said that, i was considering putting a d15 into it..but wouldnt i lose my heat, ac and ps? i love having all that as i have a wife n 2 babies

 

by cam seal, you mean the plug? if not, it's probably coming from there.
just hose it all off with brake clean. everything. get it spotless. then just run the car and watch with a flashlight to see where it's coming from. it aint rocket surgery

 

no i mean the cam seal, that cheap shitty plastic piece of crap, it was leaking when i got the car, now i got the aluminum BLOX cam seal in and its NOT coming from there..

 

that's not the cam seal. it's the plug.
but yea, just hose it down with brake clean. all spotless. then run it and watch with a flashlight.

 

then why does EVERYONE even the place i bought it from call it a "Cam seal"