View Full Version : help please!!! just installed AEM CAI


NACer4lyf
05-12-2009, 09:58 PM
ok had no problems installing the intake. i looked at the directions somewhat but it was pretty straight forward.

my question is. i plugged up the three hoses before the MAF does it matter which hose goes on which plug? i just put them on whichever fit the best.

second question. (i know i should have pics but ill take em in the morning) i plugged the MAF in and there is a connector just hanging there and also there was like 3 other hoses/connectors that didnt have anywhere to be put what do i do with these? right now there are just laying in there

i took there car for a drive it sounded good i like it no check engine lights but after the car was fully warmed up and everything i would drive to about 6k 6.5k and it would lag a little and when i shifted it acted like it had a hard time catching back up...you know what i mean idk how to explain it though.

is this normal? kinda worried me

what do i do w/ the excess hoses and loose stuff hanging around? because there is one part that is really small opening its a hose but really small i placed my finger over it w/ engine running and it was sucking in air.

i just dont know what the next step to do.

help me out guys...hope this was explained good enough and also i apologize for not having pics to refer to.

jjc3925
05-12-2009, 10:05 PM
u should have ONE connecter just chillin

and you should have ONE hose just chillin....its the thin hose that goes to thee throttle body i believe...you just gotta plug the end of it.

as far as the order of the 3 hoses i dont really think it matters....but i plugged them the same exact as stock.

NACer4lyf
05-12-2009, 10:07 PM
oh ok. well i had a couple i think just chillin and i plugged them in to make one long one i guess with a small opening at the end should i put something over it so its not to suck up dirt. my dad said i should shorten the hoses and mount them and stuff but i was like uhh damn that sounds like a lot of work haha

myriadshalaks
05-12-2009, 10:11 PM
probably just need to let the computer re-adjust.

i plugged my hoses back up the same as stock too. i don't see how it would matter though.

the other connector goes to the secondary vacuum on your stock intake which you removed. it now goes no where. tape it back.

i just had a thread going through the same thing.

it's fun to install stuff. enjoy it!

myriadshalaks
05-12-2009, 10:12 PM
i shortened the hoses too.

i don't recommend plugging things in where they don't belong.

NACer4lyf
05-12-2009, 10:13 PM
^ +1 i actually had a blast doing it. ok so best thing to do is just tape it back or get it out of the way some how. what about that little vacuum hose. did you put a cap on it or anything?

myriadshalaks
05-12-2009, 10:14 PM
you can remove all that vacuum stuff. it goes nowhere.

myriadshalaks
05-12-2009, 10:15 PM
and make sure you cap the vacuum inlet on the throttle body. it should have been very difficult, so you would remember doing it.

not doing that might explain your lack of power.

jjc3925
05-12-2009, 10:16 PM
yea i believe its a green connector right?? that one just fasten to the side somewhere...and the lil thin hose you want to plug...


you did plug the MAF back in right??

NACer4lyf
05-12-2009, 10:18 PM
yeah i did plug that back in

and that little green part your talking about its like white/green right? how do i cap that?

Jon316G
05-12-2009, 10:20 PM
The green/white is probably the one-way valve.
He is talking about the green wire harness that plugs into the solenoid.
Just cap the nipple behind the throttle body and remove the whole VFAD assembly.

myriadshalaks
05-12-2009, 10:21 PM
no, he was talking about the green connecor we've been saying to ape back. it's in the wire bundle with the maf.

you said there was still vacuum tubing in your bay. that should be disconnected at the throttle body and removed.

and the inlet on the throttle body that you pull the hose from should be CAPPed. there should have been a very small cap in your kit. it goes there.

NACer4lyf
05-12-2009, 10:23 PM
hmm i got it used but there is a little rubber cap laying on my garage floor i bet that would work lol.

damn

ill take pictures tomorrow because some of this stuff is going over my head lol sorry

so basically all the excess hoses i just take off?

NACer4lyf
05-12-2009, 10:24 PM
The green/white is probably the one-way valve.
He is talking about the green wire harness that plugs into the solenoid.
Just cap the nipple behind the throttle body and remove the whole VFAD assembly.


ok wont that throw a check engine light? and where exactly is the VFAD can you explain that a little more

Jon316G
05-12-2009, 10:25 PM
ok wont that throw a check engine light?
As long as you cap the nipple behind the throttle body, you won't get a CEL.
Let me dig-up some pics I posted in other threads showing the assembly.

myriadshalaks
05-12-2009, 10:27 PM
you can do this.

the the throttle body is the metal thing your cai is connected to.

on the bottom side of it, there's a nipple, an inlet. it probably has one end of your vacuum hose connected to it.

remove the hose and cap it. it's going to be hard. but keep at it.

all of the hose can be removed. the screws that hold it down, the mounts, the connectors, everything, all the way to the front of your car.

that's it.

NACer4lyf
05-12-2009, 10:27 PM
ok thanks man that will help out a lot!!!!

NACer4lyf
05-12-2009, 10:28 PM
you can do this.

the the throttle body is the metal thing your cai is connected to.

on the bottom side of it, there's a nipple, an inlet. it probably has one end of your vacuum hose connected to it.

remove the hose and cap it. it's going to be hard. but keep at it.

all of the hose can be removed. the screws that hold it down, the mounts, the connectors, everything, all the way to the front of your car.

that's it.

ok can this be done w/out take the intake back out? id really rather not lol and whats the best thing to use for capping it?

myriadshalaks
05-12-2009, 10:28 PM
and don't drive it before capping the inlet again. you don't want unfiltered particles going directly into the throttle body.

myriadshalaks
05-12-2009, 10:29 PM
ok can this be done w/out take the intake back out? id really rather not lol and whats the best thing to use for capping it?

you probably will need to remove the strut bar if you've put that back on.

be careful not to strip the nuts.

NACer4lyf
05-12-2009, 10:29 PM
dang ok lol thanks for the heads up on that though i didnt feel quite right driving it w/out exactly knowing or not lol

Jon316G
05-12-2009, 10:30 PM
VFAD assembly is everything with a dash-line outline:
http://www.rx8club.com/attachment.php?attachmentid=119825&d=1209690553

http://www.rx8club.com/attachment.php?attachmentid=136611&d=1239247531

NACer4lyf
05-12-2009, 10:30 PM
you probably will need to remove the strut bar if you've put that back on.

be careful not to strip the nuts.


haha ok i tried once already to take that baby off...lets just say i worked around that lol but ill try again haha

NACer4lyf
05-12-2009, 10:31 PM
VFAD assembly is everything with a dash-line outline:
http://www.rx8club.com/attachment.php?attachmentid=119825&d=1209690553

http://www.rx8club.com/attachment.php?attachmentid=136611&d=1239247531


ah ok what do you recomend using to cap it off?

Jon316G
05-12-2009, 10:32 PM
ah ok what do you recomend using to cap it off?

If you weren't given one, go to Autozone and buy a variety pack of vacuum caps.
Its only a couple bucks.
Then use the size that fits snug.

myriadshalaks
05-12-2009, 10:33 PM
stand by your driver's front wheel. lean over and put your right arm down under the relatively large metal object that your CAI is connected to. do this with your palm up.

you should feel the nipple.

myriadshalaks
05-12-2009, 10:34 PM
you can also use one of the caps from the stock airbox. look on there. you'll find one that will work.

NACer4lyf
05-12-2009, 10:35 PM
ok when i feel that what do i do next take it off?

Jon316G
05-12-2009, 10:35 PM
you can also use one of the caps from the stock airbox. look on there. you'll find one that will work.

Umm..... what caps are you referring to?

myriadshalaks
05-12-2009, 10:36 PM
that pic has some stuff you won't see in your car.

NACer4lyf
05-12-2009, 10:36 PM
you can also use one of the caps from the stock airbox. look on there. you'll find one that will work.


ok sweet i hope i can find something lol

myriadshalaks
05-12-2009, 10:37 PM
Umm..... what caps are you referring to?

it's like a square looking one. i found it on my stock box in one of the corners.

i'll take some pics for you in the morning.

myriadshalaks
05-12-2009, 10:38 PM
the shape makes it way easier to put on. i've had it on for a few weeks now i guess. seems to be working fine.

NACer4lyf
05-12-2009, 10:38 PM
thanks again guys for the help i hope i can get this taken care of

NACer4lyf
05-12-2009, 10:40 PM
but if i cant find the cap your talking about what is my next best thing to use?

myriadshalaks
05-12-2009, 10:40 PM
if i did, you can.

NACer4lyf
05-12-2009, 10:40 PM
^ lol hope i can

myriadshalaks
05-12-2009, 10:41 PM
like he said, autozone. it's a very small cap you need. the size that would cap a fairly blunt number 2 pencil.

NACer4lyf
05-12-2009, 10:41 PM
all the reading ive done on installing these not much is said about what to do w/ the remains lol

NACer4lyf
05-12-2009, 10:43 PM
like he said, autozone. it's a very small cap you need. the size that would cap a fairly blunt number 2 pencil.

oh haha i didnt see that post lol my bad

myriadshalaks
05-12-2009, 10:44 PM
yeah, once the product is in, they're out. lol.

NACer4lyf
05-12-2009, 10:45 PM
haha your not kidding.

so basically all i need to do is cap that vacuum nipple on the throttle body and thats it the excess hoses will be able to be taken out and my car wont stutter?

Jon316G
05-12-2009, 10:57 PM
so basically all i need to do is cap that vacuum nipple on the throttle body and thats it the excess hoses will be able to be taken out and my car wont stutter?

Correct.

NACer4lyf
05-13-2009, 07:24 AM
ok update lol

i tried finding a cap but no luck lol i took off the hose connected to the nipple like you guys said behid the throttle body. pulled that off and took that hose it was tiny put a screw on the end of it and a cap and the end of the screw. and put the hose back over the vacuum part lol i felt like a genius haha i tried taking pics but camera is fuckin up for some reason. and i gotta go to work. ill update w/ pics later

thanks again for helpin me out guys

jjc3925
05-13-2009, 09:57 AM
that black nipple u said was on your garage floor is what you needed to cap it lol.

NACer4lyf
05-13-2009, 10:53 AM
haha na unfortunately it didnt fit lol

but this is something weird that happened and i cant fig. out what the problem is.

im driving and im in first gear everything sounds good untill i get to about 7.5 8k and then the engine just bogs really bad and felt like it just slowed down the higher the rpm was. then the CEL started flashing....

im hoping its just the computer getting used to everything and what not because i can sit idleing and rev to 8.5 9 all day and nothing but beautiful sound but when in motion its another story...what do you guys think the problem is

NACer4lyf
05-13-2009, 12:41 PM
what could the problem be?

DarthRX8
05-13-2009, 12:45 PM
disconnet your battery and connet it again. That should reset your PCM.

myriadshalaks
05-13-2009, 01:32 PM
haha na unfortunately it didnt fit lol

but this is something weird that happened and i cant fig. out what the problem is.

im driving and im in first gear everything sounds good untill i get to about 7.5 8k and then the engine just bogs really bad and felt like it just slowed down the higher the rpm was. then the CEL started flashing....

im hoping its just the computer getting used to everything and what not because i can sit idleing and rev to 8.5 9 all day and nothing but beautiful sound but when in motion its another story...what do you guys think the problem is

the cap is very tight and hard to put on. you'll think it's too small.

i don't like the way you have it now. if i understand right, you just have a capped hose hanging from your throttle body?

i guess it works, but i don't think it's the best solution.

not sure what the problem is in the upper revs. is your MAF all the way secure? try tightening the screws. and make sure all your couplings on the intake are secure.\

you might also want to check your spark plugs. it's possible you dislodged one especially if you removed the driver's side wheel when installing your intake.

NACer4lyf
05-13-2009, 01:51 PM
ok ill check all those after work.

i may have to tighten my MAF i dont remeber how tight i had it and it couldnt hurt to tighted the hose rings even more.

and yeah i have a capped hose hanging from the TB lol is that too ghetto?

J03K1LLARX8
05-13-2009, 02:09 PM
the vfad is mounted behind the front bumper. you have to remove the plastic peace by the hood latch and take off a few screws to pull down the bumper. once that is out of the way you will be able to see the vfad from the gap of the bumper and fan. its only a few bolts it only took about 10min to pull.

J03K1LLARX8
05-13-2009, 02:12 PM
also reset you ecu so it can program itself to the new air flow. once you do that it should go away.

NACer4lyf
05-13-2009, 02:13 PM
oh ok cool i didnt know that was the VFAD lol i already took that out when i was taking the stock intake out

NACer4lyf
05-13-2009, 02:21 PM
how do i reset the ECU? that sounds difficult lol

doing that, will it make my car stop stuttering after a certain rpm rainge?

DarthRX8
05-13-2009, 03:05 PM
yes. unplug the negative terminal on your battery for a a mintue or so and reconnect.

That will reset your ecu!

NACer4lyf
05-13-2009, 03:06 PM
ok ill do this when i get home from work. i did some research on the different ways to reset. but would this procedure just be better for my problem or should i hold odo. button and turn key on and then off?

cjkim
05-13-2009, 03:22 PM
ok ill do this when i get home from work. i did some research on the different ways to reset. but would this procedure just be better for my problem or should i hold odo. button and turn key on and then off?
20 brake pumps
pull room fuse

NACer4lyf
05-13-2009, 05:20 PM
ok i swear my car has a mind of its own...lol...i drove home from work...nothing it was beautiful instead of pay attention to the horrible stuttering and slowing of the engine i actually noticed a little more pep to it and the sound it has is amazing lol i was at a red light and it turned green so im going and i was about at 5.5 6k when i shifted and this cop on the other side turned and glarred at me...

lol it was great haha

hopefully the ecu corrected itself because i was kinda worried about resetting it myself.

do you think i should any ways?

myriadshalaks
05-13-2009, 08:44 PM
give it a couple of days and see how it's doing before resetting, IMO. I didn't reset mine, and after a few days, the idle calmed down, and everything was back to normal except for the bitchin sound and possibly some better throttle response.

NACer4lyf
05-13-2009, 09:24 PM
yeah i think your right after driving it last night and today i think it has readjusted and this sound you say "bitchin" dude you got that damn right lol and yeah i have also felt a better throttle response also

cjkim
05-13-2009, 09:33 PM
meh, i'd reset the ecu anyways
new intake, might as well clear ltft

NACer4lyf
05-13-2009, 09:41 PM
yeah true. i prolly will end up doing it just to be on the safe side

jjc3925
05-14-2009, 10:22 AM
theres nothign to be afraid of....all you do is disconnect the battery and its all reset. i did this too....i actually had the battery disconnected while i installed. and my first test run with the intake had absolutely no problems...went right onto the highway and redlined

DarthRX8
05-14-2009, 01:00 PM
^^It is in the instructions to disconnet for this very reason! I did the smae thing and had no issues.

NACer4lyf
05-14-2009, 01:55 PM
oh dang haha thats what i get for not reading the instructions lol just looked at pics/did it they way i thought haha my bad. well it seems to work good now but when i get home i will take the neg. off the battery for a while

rodjonathan
07-19-2009, 12:11 PM
yea i didnt do the reset either it took a few days but mine went back to normal

living the dream
06-02-2010, 12:07 AM
yea i got a misfire cel after my aem install still fighting with it..did everything correctly just dont knwo whats going on with it..checked plugs good..checked for leaksno leaks..caped manifold..put a tighter o ring on the maf so its a tight fit i dont know what it is

maskedferret
06-02-2010, 01:48 AM
The cap that comes with the intake is crazy difficult to get on securely; I'd swear the thing was the wrong size (too small).