04 Duratec stalling.. just installed K&N FIPK2

[un1x]

Well the car runs great but when I go on neutral from 3-4 gear to a complete stop or slowing down.. the car stalls and i gotta restart the car to regain control. Sometimes when im moving and i decide to put it on neutral to cruise it will stall. I want to go back to my Marcy CAI if this keeps happening. I installed everything correctly.. what could the problem be? The connection in the TB isnt to tight, i checked.

[Egz]

Just to make sure, and I doubt its the problem, but is the MAF sensor installed facing the right way?

[hommie]

I heard there was a problem with those intakes. However I don't remember what the problem was.

[Egz]

That was a lean issue, due to the wrong sizing of the MAF housing. How much of an issue that is, I don't know.

[un1x]

ahh this is pretty scary... my car shuts off during driving and sometimes i dont notice till have i have to turn the wheel cuz power steering shuts off. AHHh looks like im stalling all over the place. Im keeping the gears low for now before i get home from work and ill check on the MAF. I dont think you can mess up on putting it backwards because the place where you screw it in is a distinct area. But i will see

[247_racing_zx3]

Its MAF not getting the correct air. Also make sure the small hose that goes to the top of the intake is still connected. Im surprised your not throwing a code.

[un1x]

yea no codes... the tube other tube is connected and the MAF is going to be checked when i get home today.

And the new coilovers are making my tires rub during turns now.. ehhh do i need to buy camber plates? or just roll the fenders.. or both?

Someone throw a techday and ill gladly contribute. Something close to San Diego, CA haha

[RUN_ZX3]

make sure the MAF is getting a good seal where it mounts to the MAF housing. The FIPK should have come with an adapter and a gasket.

[un1x]

dang... i guess everything was put together correctly. Why does it die out from a high RPM 3k-4K to neutral. This is really dangerous and im clueless as what to do. I think im gonna put back my Marcy CAI and stick with that until someone has any idea. Please help me =(. I dont want to think that i spent $350 for a CARB sticker. Would have rather given the smog guy a $100 tip to pass me =P.

[llamonica87]

i had that problem when i insralled the stealth cai i got so frustrated because no matter what i did the car would still stall so i went back to the custm short ram my bro and i made and the car runs great still getting a lean code but runs great

[Cameroon]

Originally Posted by un1x

dang... i guess everything was put together correctly. Why does it die out from a high RPM 3k-4K to neutral. This is really dangerous and im clueless as what to do. I think im gonna put back my Marcy CAI and stick with that until someone has any idea. Please help me =(. I dont want to think that i spent $350 for a CARB sticker. Would have rather given the smog guy a $100 tip to pass me =P.

Well if the Marcy intake works then it probably is the K&N
's MAFS tube area being the wrong size.

As for the smog check why wouldn't you just swap back to stock? Your first test on an '04 won't be until 2010 and then it's every other year after that. I would think 20 minutes of work would more cost effective.

[Z63R]

Why does it die out from a high RPM 3k-4K to neutral. This is really dangerous and im clueless as what to do.

Well the car runs great but when I go on neutral from 3-4 gear to a complete stop or slowing down.. the car stalls and i gotta restart the car to regain control. Sometimes when im moving and i decide to put it on neutral to cruise it will stall.

Until you get the idle problem figured out, stop driving like that. That driving style is also counterintuitive to the fundamentals of a decent performance driving technique.

You're not saving gas by selecting neutral at speed because these engines run by computer-controlled fuel injection and not a carburetor. Fuel flow is shut off upon total deceleration whereas a carb will continue to meter fuel as long as there's manifold vacuum.

[n2o Focus]

Mine does that too. I thought it was the tune. I just watch the rpm's and right when it drops I tap the gas. I only do this in my neighborhood so its not really an issue when it stalls and I rarley do it.

[un1x]

Originally Posted by Z63R

Until you get the idle problem figured out, stop driving like that. That driving style is also counterintuitive to the fundamentals of a decent performance driving technique.

You're not saving gas by selecting neutral at speed because these engines run by computer-controlled fuel injection and not a carburetor. Fuel flow is shut off upon total deceleration whereas a carb will continue to meter fuel as long as there's manifold vacuum.

I dont completely drive like that. But sometimes when i need to turn i just go on neutral... brake.. then 2nd-3rd gear.. not all the time. But when i do.. thats when i remember that my car shuts off lol. MAN!!! is there a fix to this problem!!! i really want to keep that CAI.

[un1x]

Originally Posted by n2o Focus

Mine does that too. I thought it was the tune. I just watch the rpm's and right when it drops I tap the gas. I only do this in my neighborhood so its not really an issue when it stalls and I rarley do it.

isnt that a pain tho.. you'd have to keep an eye of it so it doesnt drop below 1k rpm... =(

[n2o Focus]

Yeah its a pain, but I dont do it very often. Like I said i only do it in my neigborhood, so that I dont have the drivetrain loss to slow me down. I just watch it and when i see it start to drop I tap the gas. Truthfully I dont remember it happening before I put the header tune on, but im not 100% sure either. Like Z63R said your not saving gas by doing it.

[matrho2792]

I had this same problem with my car. I called Ford Racing and they described the problem to be too much airflow. What you have to do is get the car professionally tuned to accept the new airflow and it should run just fine. If nothing else you may need to put the stock airbox back in.

[un1x]

Originally Posted by matrho2792

I had this same problem with my car. I called Ford Racing and they described the problem to be too much airflow. What you have to do is get the car professionally tuned to accept the new airflow and it should run just fine. If nothing else you may need to put the stock airbox back in.

hmm what if i put that dry charger on it.. that screen looking thing. Wait nm i did that already and im still having the same promlem.. Darn

[broham71]

Wow... interesting. I've had my K&N FIPK on the car for quite some time now without this issue.
Although It did stall on me two or three times after I had the Exedy stage 1 installed, but not since. Perhaps you have a vacume line off or cracked... or check your IAC.

[matrho2792]

Whatever you do don't mess with the MAF. Although the ram air effect doesn't work you may try to modify the tube that the MAF sits in and putting a cone on one end and hooking the other end straight up to the throttle. This has worked in my car and others that have had the same issue. It comes down to how much you want to spend. If you don't mind spending a couple of bucks, then head down to a shop and get it tuned. If not put the stock airbox back in or think of some way to do a Ram air effect instead of a cold air effect which is more sensitive to the incoming charge of air which is what causes the car to stall. Hope I helped.

[slowzx320]

i have the same intake, no problems here. the maf can go in two ways. I put my maf in the wrong way the first time and it did exactly what your saying. Your maf has a square opening on it make sure that its facing downward torward your filter. That could be it

[un1x]

Originally Posted by slowzx320

i have the same intake, no problems here. the maf can go in two ways. I put my maf in the wrong way the first time and it did exactly what your saying. Your maf has a square opening on it make sure that its facing downward torward your filter. That could be it

I thought the same exact thing, but i corrected it. The engine still dies at those times when it seems like it sucked in too much air and i go on neutral. Although I've been getting used to controlling it. Ill have to think of another way to fix it. Where can i get this tuned?

[RUN_ZX3]

Originally Posted by un1x

dang... i guess everything was put together correctly. Why does it die out from a high RPM 3k-4K to neutral. This is really dangerous and im clueless as what to do. I think im gonna put back my Marcy CAI and stick with that until someone has any idea. Please help me =(. I dont want to think that i spent $350 for a CARB sticker. Would have rather given the smog guy a $100 tip to pass me =P.

have you tried installing the old intake to see if the probem goes away?
If it does just transfer the eo decal to the marcy intake

[TungfumastR]

Originally Posted by Egz

That was a lean issue, due to the wrong sizing of the MAF housing. How much of an issue that is, I don't know.

The aircharger was the one that caused the lean condition. I know because I have one thats only use now is taking up space in my shed. Lucky for me the filter bolted right on to the maf hose, viola, stealth intake. The Ford tech said that the short term fuel trims were fine, but the long term trims were 9% lean. He said that this wasn't a dangerous condition as far as melting pistons, but it was leaner then Ford is comfy with. I'm really disappointed in K&N for not doing their homework. It was a great lesson on why we should purchase from forum sponsors.

[taco_eating_monkey]

I've had my FIPK 2 on my 07 for about 3 months now and I've never had any problems at all. I hope you figure it out.