[Supras] (UPDATE) Idle issue after installing lexus AFM.

Thu May 17 21:13:32 CDT 2007

Wow..awesome.

But..its not the AFMs fault, the common high flow air filters dont..hmm..how
do I say.."straighten" out the airflow if the air around it is turbulent to
let ANY AFM get a nice stable solid reading.

Remove the honeycomb in front of the AFM (if you have not already) for a
dramatic example of this and how your car idles.

The lexus housing is larger, which slowwwwsss dowwwnnn the airflow compared
to a stock AFM body, and this contributes to an uneven non-laminar airflow
across the sensor. (which is how the ECU sees "less" air to promote a higher
boost fuel cut)

Again, welcome to the world of a thousand shades for grey.  Doing it all the
right way costs more, but ask anyone..like say Malik..what a rebuild is
costing him.  Blowing things up at only 350Hp aint go grey area, thats cold
hard black & white catching up to ya.

On 5/17/07, Harley <CoolGuyHB at socal.rr.com> wrote:
>
> So.. I was goofing around under the hood today. The car had a rough idle
> like i have been describing. When i closed the hood the idle would drop and
> rise drop and rise and continue but never dies out. When I open the hood it
> normals out. Idle still a little rough but it stops rising and dropping. I
> repeatedly opened and closed the hood for my own amusement for a while then
> i left it open and sat there scratching my head. I am missing the fan
> shroud... Could it be that the fan is pulling air away from the filter and
> causing the tempermental Lexuz AFM to throw off the idle? I was amazed how
> opening and closing the hood was making such a huge difference.
>
> Which brings me to this... Does someone have a spare fan shround that is
> in great condition that they would be willing to sell to me for cheap. Or
> does anyone have the electric fan setup they would be willing to sell?
>
> - Harley(87t)
>   ----- Original Message -----
>   From: b2nice84 at aol.com
>   To: millenia2000 at hotmail.com ; CoolGuyHB at socal.rr.com ;
> supras at supras.com
>   Sent: Wednesday, May 16, 2007 4:05 PM
>   Subject: Re: [Supras] Idle issue after installing lexus AFM.
>
>
>   Remember it has to come form this RX-7.  This information was found on
> the Tech Center of our beloved www.supras.com writen by: Adam Hingten.
>
>   "This injector was used in only one OEM application that I know of: the
> first half of the '87 model year of the Mazda RX-7 Turbo II. This makes this
> injector a little hard to find. After the first half of the '87 model year,
> Mazda moved to high impedance 550s for the Turbo II and high impedance 450cc
> for the NA RX-7."
>
>   Here is your link
>   http://www.supras.com/06/techcenter/display.php?QID=21
>
>
>   -----Original Message-----
>   From: millenia2000 at hotmail.com
>   To: CoolGuyHB at socal.rr.com; supras at supras.com; b2nice84 at aol.com
>   Sent: Wed, 16 May 2007 3:46 PM
>   Subject: Re: [Supras] Idle issue after installing lexus AFM.
>
>
>   I might be able to source some rx-7 injectors for you as most of my
> friends drive them and a couple work on them.
>
>   ----- Original Message -----
>   From: <b2nice84 at aol.com>
>   To: <CoolGuyHB at socal.rr.com>; <supras at supras.com>
>   Sent: Wednesday, May 16, 2007 5:31 PM
>   Subject: Re: [Supras] Idle issue after installing lexus AFM.
>
>   > Here you go buddy.
>   >
>   >
> http://cgi.ebay.com/ebaymotors/PTE-550CC-LUCAS-INJECTORS-TOYOTA-SUPRA-MKIII-TURBO-NEW_W0QQcmdZViewItemQQcategoryZ33554QQihZ008QQitemZ180115868955QQrdZ1QQsspagenameZWDVW
>   >
>   > The evel eBay price.
>   >
>   > Not too bad. or you can hunt down the RX-7 turbo 550cc injectors for >
> direct plug in with low impedence but good luck finding three RX-7 turbos >
> in the junk yard with these injectors.
>   > -----Original Message-----
>   > From: CoolGuyHB at socal.rr.com
>   > To: supras at supras.com
>   > Sent: Wed, 16 May 2007 2:05 PM
>   > Subject: Re: [Supras] Idle issue after installing lexus AFM.
>   >
>   >
>   > I didn't install 550s. I just hooked the AFM up. It allows me to boost
>   > higher as it eliminates the boost cut. Anyone know how much a set of
> 550s
>   > would cost me. Or would I even be able to use them with out a an AFC?
>   >
>   > Here are my mods:
>   >
>   > AEM Air filter
>   > Cooleez intake(replaced the accordian hose)
>   > BIC 3" DP
>   > Magnaflow highflow cat
>   > 3" wickedflow muffler
>   > Greddy B-Spec Profec-II Boost controller
>   > ACT 4puck clutch
>   >
>   > ...as far as the rest of the motor goes, its all stock
>   >
>   > should i try replacing the fuel filter? I don't think it has ever been
>   > replaced and it has a rough start in the mornings which is normally a
> sign
>   > of a clogged fuel filter. At least with my experience.
>   >
>   > - Harley(87t)
>   > ----- Original Message ----- > From: "Wade Tobin" <wwt3198 at yahoo.com>
>   > To: <supras at supras.com>
>   > Sent: Wednesday, May 16, 2007 2:35 AM
>   > Subject: Re: [Supras] Idle issue after installing lexus AFM.
>   >
>   >
>   >> What are your mods? Generally, 550s should be used in conjunction
> with
>   >> the Lexus. Or you could go the RRFPR or FPR route with a AFC using
> the
>   >> stock 440s. 440cc injectors are NOT recommended with the Lexus unless
>   >> alone. I run a Walbro, RC 550s, SAFC, Aeromotive 1:1 w/ the base set
> to
>   >> 43.5psi on my 7m MK2. With out the proper fuel upgrades, the Lexus
> AFM
>   >> will lean the A/F ratio out causing detonation and ultimately a blown
>   >> motor.
>   >>
>   >> Harley <CoolGuyHB at socal.rr.com> wrote: My buddy sold me a Lexus AFM
> and
>   >> ever since I installed it the car wants to die during idle. It never
>   >> actually dies during idle but it realy wants to. Sometimes while
> coming
>   >> off an off ramp it will die when I put in the clutch. After it warms
> up >> it
>   >> will streighten out but then it misses a little during idle. Is there
>   >> anything else I have to do after installing the Lexus AFM?
>   >>
>   >> - Harley(87t)
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>   >>
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>   >> 10:47 AM
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