tjf471

I got an 08 ex . just installed cai. hesitating after shifts and stahls when i stop. what could be the problem. thanks.

invsta

First, make sure there are no air leaks at your connections.
Was the filter securely tightened to the pipe? If not, of course...thats a problem.
I'm not sure where you live, but IF its raining right now, is water splashing the filter? If water got in, you've found your issue.
Not that the R18 isn't badass for what it is, but the EX wasn't tuned exactly for the extra air. You may need re-tuning. But check the other fixes first.

Here are some other threads with this issue:
https://honda-tech.com/forums/showth...ight=cai+stall
https://honda-tech.com/forums/showth...ight=cai+stall
https://honda-tech.com/forums/showth...ight=cai+stall

tjf471

I removed back up fuse and let sit for 20 min. let idle with nothing on for 20 . it did help during accelleration but still stalls when coming to a stop. this is a five speed by the way. Checked all connections. all looks good. Anyone else had this? Thanks

2008fijibluesi

Are you pushing the clutch in when coming to a stop?

The auto is 5 speed too...just to let you know.

builthatch

double check MAF sensor is installed correctly, make sure there are no air leaks near it.

this behavior can happen when you play around with the maf sensor and it's not seated right, dirty or god forbid in backwards, etc, etc.

did you by chance drop the MAF sensor during the install?

does it idle normally aside from when you come to a stop?

do you have any check engine lights?

i-VTEC_DOHC

your maf sensor is backwards.

tjf471

It is a manual tranny. yes i am pushing clutch in when i come to a stop . I come to as stop in second gear and push the clutch in and as soon as the rpms drop it stalls. The maf was not dropped and is in properly. hole in maf is pointing to front of engine. Engine ildes properly. 1000 during warm up and drops down to about 750 afterwards. no cel light as of yet. thanks

invsta

I did some looking around on the net. Here is what I found...

Sensor is probably the culprit as the others have stated. (these links discuss other makes and models with this issue)
1) Make sure MAF isnt damaged
2) Make sure oil didnt get on it
3) Make sure it is clean in general
They make cleaner for it

http://www.justanswer.com/questions/...old-intake-air
http://www.explorerforum.com/forums/...d.php?t=246555

tjf471

Rechecked all my connections. all are good. even went as far as checking welds while pressure testing. ok. reinstalled and swapped out sensor with known good. reset ecu and still same problem. found when unit hesitates it is alwarys around 2700 rpm and 8 out of 10 times will stall as i come to a stop. If i can't get it fixed it has to come off. I am putting way to much stress on the starter. Thanks guys.

CoochieStank

Wow, this is a bummer! What brand of intake? I hope it isn't a generic brand found on ebay.

Nighthawk R18

happened to me for a while

it went from happening frequently, to sometimes, to almost never. i notice it mostly when i clutch it and making a u turn (or with the steering is all the way to one side) when the power steering is drawing the most current from the battery.

do what u want but if you give it some time itll get better

btw did u let your car idle 15 minutes before driving it after the install?

builthatch

in for OP response. it is true that battery reset, initial idle, and easy driving are ideal for setting fuel trims back up in a nice and tidy manner.

BUT i would not expect such a violent reaction such as what the OP has experienced. who knows though...

in for response.

tjf471

I have completed the reset a few times and still no change. however i did get a dtc lastnight of p0171b bank 1 system too lean. Which I am sure that the engine is just getting too much air and not putting the required fuel into the cylinders to complensate. just thought I would let you know what I have found. Thanks again.

builthatch

what intake is it

tjf471

the intake is a fujita

2008fijibluesi

I threw the same code and was having similar problems with my Fujita intake. My homemade "x-intake" kicks the Fujita's *** and has never thrown a code or caused a problem.

tjf471

what ever it takes to make my car run good i am down. Just kinda p*ss*d I spent all that money and get this out of it. I will post some pics of my ride when I get my wheels put on. motegi sp10 matte black 17x7. Hopefully after christmas I will be able to afford a suspension. like i said before 2500 to 2700 in every gear it will stutter, and 8/10 times will stall when i stop. just rechecked for any leaks and reset. so evidentally that is not the prob. thanks.

Nighthawk R18

holy god 8 of 10?! thats absurd. seeing as how you made sure everything was nice and tight, all pieces and all hose clamps, there is one thing that my instructions and alot of DIYs thread seem to miss.

when i installed my aem intake (while ago) there is an elbow pipe after the intake manifold, but before the after market intake. the elbow pipe must be loosened from the intake manifold and twisted towards you so it will directly fit the new intake. without doing so could cause a crimp in your intake system restricting air.

if that doesnt work.

1. go to auto parts store and buy "MAF Sensor cleaner" spray, read dirctions and apply

2. if you can find someone in your area to swap filters and see if thats the problem. fujita could just be too free flowing

3. sell it buy different brand intake.

take a pic of your engine bay please. mostly to expose the intake.

-jj

builthatch

i'm curious....does the fujita have vanes near the MAF, inside? i know on alot of the new MAF cars, like my Mazdaspeed3, such vanes are absolutely required to prevent turbulence and confusion for the MAF. they "straighten" the air approaching and passing the MAF.

i wonder if that is the issue with this intake you are using. you should call fujita, maybe they revised the design and the one you have is an old one? i know that AEM, who was contracted to make the cold air intakes for Mazdaspeed, had to supply these finned inserts after Mazda put a stop sale on the intakes because of issues and check engine lights. sure enough the straightener insert solved allllll the issues.

100miles+

Sounds like a wet MAF, I dunno tho.

tjf471

My fujita does not have vanes. I have sent an email to them inquiring about this . Thanks everyone!

builthatch

you'll get to the bottom of this.

keep us updated.

Nexx

It's been awhile but I have a SI and my INJEN CAI had similar issues when I had it. The car would hesitate on acceleration and on rare occasions even stall. Car "felt" fine after 4000rpm but it was noticeable down low. The problem, as I saw it, was caused by air fluctuation at the MAF sensor since most aftermarket intakes failed* to address the increase air from the larger diameter and the turbulence from the pipe design.

Maybe the issue has been resolved now but at that time, I had the latest and most overpriced INJEN CAI available that utilized their MR (*cough* marketing *cough*) technology.

I'm glad I sold it and got a custom MAF housing SRI. Smooth acceleration. Almost like stock.

*lack of stabilizing fins at the MAF sensor.

i-VTEC_DOHC

well theres your problem. its a fujita

FAb5

Wow I'm glad I kno that now