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Discussion Starter #1
I went to order a new AEM CAI and was told to save my money by the dealer because there is only a 2HP max gain at the wheels and if you just upgrade the stock filter you can get the same! Is this true, he is also saying that people get more problems from the intake than than anything else when you replace them in a SVT, but not a ZX3!
 

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I have not had a chance to try out the AEM CAI, in particular, but I HAVE made my own CAI and had no problems out of it earlier in the year. The only problem I've been seeing is when I try to use a Foam Intake Filter (HKS Style).......I get a C.E.L. every time I install the Foam and the car tends to surge and act as if it's running rich (Verified this with my OBD Tester). However, I'm skeptical about why the dealer told you this as it seems that the MAF is designed to adjust to changes in air intake whether the stock intake is on or an aftermarket one is being used. By the way.......Is the "Dealer" you are talking about the Ford dealer or a Tuning Shop that gave this advice? Many other people on the board put CAI's on their SVT with success (Try a search on related topics). I guess the verdict is out though until some other people chime in. Seems like some people have no problems at all and others have replaced (don't remember who it was unfortuantely on the board) their MAF a few times. Don't know if this helps at all but it's a start.

-Later
 

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thanks, it's a tuner, He was basically saying the same thing, about the C.E.L, and alot of people have the car back fire also. He is also saying that I will need something to Block the water from getting into the filter!
So What kind of filter does a AEM intake use?
 

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One person recently (in the last month or so) had some terrible issues with an AEM CAI on his SVT. Then there's a lot of folks it seems with no problems whatsoever. I'm going to just go with a K&N filter replacement.

And honestly, the difference the AEM CAI will make for you at the drag strip isn't more than what pulling seats and the spare tire will get you. And perfected launches, improved shifting, and slicks / drag radials will make WAY more of a difference than the AEM CAI for lowering your quarter mile times.

All of those things are cheaper than the AEM CAI, and none has the potential to mess with your engine (with the exception of drag-racing in general, obviously). My two cents.

Sincerely,

Beetle
 

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We have run a AEM CAI with no problems. I have heard that the MAF is very sensitive, we have had no trouble at all with it.

As of the horsepower gain, I'm not for sure but I can tell you that while having our cam gear adjusted our car dyno at 161 WHP. Only other mods at the time were Borla, ORP, and AEM CAI. This dyno was done before the new ECU Flash (YRF0), and at the time we were having some major issues with the car. I dont know if these problems affected the performance of the car at the time of the dyno. [???:)] I think the numbers were low, but I may have had my hopes too high. [:)]

I wish you luck and hope you find what works best for you. [:D]
 

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The best thing I can recommend is just a trial and error method for CAI's............I made my own with 3" plastic hose (coupled to the SVT Snorkel that I turned upside down and ran up alongside the right side of the battery on one end to the open end of the filter and then attached the snorkel to the lower left side of the lower grill), a K&N type Cone Filter, a MAF adapter, and some diamond plate, and some various rubber plumber fittings from "Tuner Paradise" (That's right..............LOWE'S :) that I shaped and modeled after the Focus-Sport setup. This worked great for me but I took it off temporarily to replace with the HKS Type Foam Filter which caused too many issues to leave it on (Pre-YRF0 update but I still think the MAF will kick me a C.E.L.). All in all, CAI's sound cool, look cool, and grab cool air which does enhance performance (other dyno's have shown relatively more than what he disclosed to you.......but this is neither here nor there as the closest thing my SVT has come to a dyno so far has been my GTECH)and something I've been wondering about lately is how many people who were experiencing the known issues before they updated to YRF0 (PCM) had CAI's.........and more specifically AEM? I know I'm getting off track here but when you think about it perhaps this is why that tuner may have tried to dissuade you from the MOD. Just my 2 cents.............

-Later
 

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Discussion Starter #8
Thank you, you sound very knowledgable! He was looking at building a custom Intake as well, I did not know if he just wanted me to be a gennie pig! Thanks for you imput and I will keep you informed on the progress!
 

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02SVTFOCI: My Husband and I experienced problems before and after the CAI was installed, the service tech told us the known issues were from the AEM CAI so my husband put the stock air box on. Needless to say things did not improve and the all to well known problems with the SVT continued.

The Service Manager did state that the MAF is very sensitive and does not take to change very well.

Do you think that some of the issues with the SVT could be related to having a AEM CAI or the MAF?

If so what if a short ram was run?

I do not know about you but my husband does not like the design of the AEM CAI and is thinking of having one made, or purchasing a short ram? What would your imput be upon this?

Sorry, to get this thread off track.
 

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My friends svt is on crack after the install as well even throwing up o2 codes, I have to install the stock stuff back in so he can get the reflash or the dealer wont do it. They say the intake will cause all thsoe problems . Pretty lazy if you ask me its not like they have to actually do work to the car.
 

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Just Curious...........what kind of Intake was on it? I pretty much always do the same thing before I get service (gotten pretty good at it and have gotten it down to 15 minutes for the whole switch).

-Later
 

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R&DSVTZX5 said:
02SVTFOCI: My Husband and I experienced problems before and after the CAI was installed, the service tech told us the known issues were from the AEM CAI so my husband put the stock air box on. Needless to say things did not improve and the all to well known problems with the SVT continued.

The Service Manager did state that the MAF is very sensitive and does not take to change very well.

Do you think that some of the issues with the SVT could be related to having a AEM CAI or the MAF?

If so what if a short ram was run?

I do not know about you but my husband does not like the design of the AEM CAI and is thinking of having one made, or purchasing a short ram? What would your imput be upon this?

Sorry, to get this thread off track.
I tend to think that it could possibly be a combination of both(edumacated guess :).........I'm not saying that the AEM CAI is a bad design (I have not owned one but have heard a few remarks here and there) but the CAI coupled with the MAF could be the cause of most of your problems. Also, have you had Ford reflash the ECU (PCM) yet with YRF0? This could possibly be an issue that has to do with elevation, climate, and the type of filter the intake uses as well. The reason I say this is when I built my temporary CAI I used a steel mesh cone filter (Like a K&N) which did not pull as much air thru the intake as the foam did which could explain why I never saw a C.E.L. with the mesh filter or any other issue (actually ran right with no battery light and good power in the midrange) I know from personal experience that when I went on the Super Street Tour last month before Nopi the car ran better in the mountains (less oxygen) with the HKS foam filter installed than when I got to Atlanta (which would explain the overly rich characteristics the car was displaying at the lower the elevation). I reset the ECU almost twice a day when I was gone that weekend and installed new plugs as well (originals had too much carbon build up from running rich since basically the first day I bought it)

All this being said..........here's what I suggest (it's not the end all fix but I got tired of Ford and there excuses as to why things were happening the way they were):

1) Install the stock airbox and make sure it's secure (just so that you can make sure no unmetered air is entering the box which would give a false reading to the MAF). THEN, after you get the car running at least as well as it did stock, try installing a short ram or just a cone filter from Auto Zone along with a MAF adapter just to see if things improve over the symptoms from the AEM CAI (They sell K&N and APC but keep in mind that APC contains three letters from the word CRAP).

2) I decided when I bought my new plugs (Autolite Double Platinums) that I would try an old trick to get a hotter spark out of the plugs and gap them to .48 as opposed to .50 as Ford recommends. This, in theory, helps the tendency for the SVT to run Rich and has actually made an improvement to mine as far as starting and the tendency to backfire when it's cold in the lower RPM's.

3) Be sure to Reset the Computer (unhook the negative (even though I usually just do both) terminal and walk away for 10-15 minutes) You'll know it has reset itself when you reconnect the terminals and the needles swing all the way right on the guages.

All that being said..........I think a short ram intake would be a good investment if you wanted something to just bolt on and be done with it. I have been modding much older sport compacts for more than 10 years and since most of those cars didn't have readily available parts (such as CAI intakes) to choose from I usually built my own. I am currently building my own that I can use as a short RAM in the winter and which will incorporate a Cold air hose (using the SVT snorkel from the stock intake in the summer).

All in all, it seems that with our cars it's a matter of trial and error(whether it's due to Ford's software mapping for the ECU). If it actually IS due to the MAF being particularly finicky and not adjusting well to an increase in air volume intake (something else you can do is clean the filaments of the MAF sensor (gingerly) with a q-tip and rubbing alcohol since sometimes it can pick up oil and other junk from the CAI or from the oil on the filter itself). One more thing that could be a factor with how adverse a CAI affects a car could be Climate. It seems (at least it has for me) that the warmer and more humid it gets the worse the car runs which is true for just about any car's performance but with the SVT it's MUCH more pronounced.

-Later
 

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WOW, [:)]

We just got the YRF0 end of last week, we have heard that it takes a couple of cold start drives before you know whether or not it worked out all the issues. (Still having some, not as bad.) After reading what you stated my husband has decided to put the stock air box back, reset the computer and see what happens. The AEM CAI has a mesh cone filter, when we first installed the CAI after a really hard run the C.E.L would appear. We removed the CAI and had the car flashed a little over a month ago RLA2. Put the AEM CAI back on and not had any problems with the C.E.L. After reading everything you have said, the short ram is what we will go with, if we decide to put anything back on.

You seem to know a lot about cars and your insight has been greatly appreciated. [pray]

Thanks again for all your help and I apologizes for getting this thread off topic.

Thanks

Donille
 
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