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Old 22-07-2008, 10:09 PM   #61
Toveco
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AMF sensor

Hi every one!
I am new on this forum and as a owner of a NICE Mazda Astina 1.8
I must ask, if you mess whit the air flow and make it to give more air to the engine, you must fix the AFM sensor (Air flow sensor) Right?
otherwise the sensor tell the computer to give more petrol i think.
and now to my question, some one now which cable go from the Air Flow sensor to the computer, I found one ho give 5v and go up to 6-7v when i give
raise throttle up, light green and brown mark on it.
I put on a box whit 2 potentiometers and 2 resistors, then I can cheat the computer.

I bee very happy if some one now this thing and can tell me,
I don't have a Manual for my car in English only Japanese and that don't help me a thing

Thanks if you give me a good answer
Tom

Last edited by Toveco; 22-07-2008 at 10:23 PM. Reason: wrong word
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Old 22-07-2008, 10:24 PM   #62
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No need to mess with the sensor wires for the MAF. Yes, there will be more air flow and the computer will know about it. However, it will automatically change the fuel. There isnt a going to be a big enough change from most kinds of intake modification to justify fiddling with the MAF. I, personally, wouldn't be changing resistors/potentiometers or anything like that.

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Old 23-05-2009, 04:47 PM   #63
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So adapting the grill and ducting the air flow straight into the stock snorkel inlet should be fine by itself? could this be accompanied by a change of the panel filter in the stock box? just wondering? toko my grill out today and have enjoyed driving around, throttle response is better.
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Old 23-05-2009, 04:52 PM   #64
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K&N panel filter would make a difference..
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Old 23-05-2009, 06:44 PM   #65
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Quote:
Originally Posted by mooniewant View Post
So adapting the grill and ducting the air flow straight into the stock snorkel inlet should be fine by itself? could this be accompanied by a change of the panel filter in the stock box? just wondering? toko my grill out today and have enjoyed driving around, throttle response is better.
Take your grill out and go for a drive. You will notice the difference at 80kph+.

Gav.
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Old 23-05-2009, 10:39 PM   #66
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what sort of differences would the K&N panel filter give, or should i just wait, not do the grill mod and install the CAI when i can
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Old 24-05-2009, 08:11 PM   #67
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Dyno tested at 2.4kW ATW on a bone stock automatic 1.8L.

Gav.
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Old 30-05-2009, 08:27 PM   #68
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eh brasileiro?!!
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Old 04-11-2009, 08:41 PM   #69
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ooops i just did the mod using a drill + spade bit and regular bits to grind off the leftovers, then stanley knifed the rest. stanley knifing it alone is far too slow in the cramped space. the plastic is actually pretty stiff too..

my stupid mistake was in leaving the grill attached to the car, now i have plastic shavings everywhere and in the aircon radiator too
what's the process to remove the grille? (BJ series protege 1.8L)
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Old 04-11-2009, 08:48 PM   #70
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2 bolts vertically from the top at outer most part of grill, 2 plastic grommets facing forward at 1/3 in in the top of the recess, lift and out she comes.

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Old 04-11-2009, 08:59 PM   #71
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Unscrew the screws & bolts within the red circles:


lift up from the edges, being careful not to break the ends off:


There are 3 tabs on the bottom, so be careful not to break these aswell, basically just lift up:



And presto, no grille!
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Old 05-11-2009, 02:38 AM   #72
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ahhh thanks for that! maybe i should've asked before i started.. too late now! i'll just take it off and clean out all the plastic shavings today
but i have to say, all that sweat and swearing was worth the noticeable gain! k&n panel filter made it feel a lot more responsive, this mod made it even better.

some have reported fuel economy gains too?
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Old 01-09-2011, 06:16 PM   #73
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all i did for mine was take the top of the air box off and put the pod over it... Sounds awesome... uses the original box snorkel to get cold air to it. i know it will suck in hot air from the engine bay... but untill i get my self a nice loud Exhaust... im keeping the pod setup that way LOL and yes i still get the same fuel eco with the pod as i do with the stock filter and i drive the car harder tyo hear the pod LOL.
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Old 22-09-2011, 06:18 PM   #74
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here is my pod setup



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Old 20-09-2012, 04:31 PM   #75
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Interesting Quirk

Hey dudes, long time no visit!

I did this mod, removed the intake right up to the filter box and i've found that there is quite a marked dead spot at 4000rpm.

I hit the throttle and if i'm driving it feels like i've tapped the brakes, in neutral there's just a slight pause in the revs before it progresses beyond 4krpm.

I've got the 1.6L ZM,

anyone have any insight as to what's going on?

Cheers
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Old 20-09-2012, 04:38 PM   #76
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turbulent air from your modified intake now causes the MAF sensor to read the air incorrectly... this is a common problem with the 1.6l BJ, especially since the MAF design is temperamental and known to go bad over time (poor design)

best to go back to stock and leave it alone... there's no power gained but noise on the 1.6l, and nothing else but headaches from dealing with the MAF sensor issues
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Old 20-09-2012, 04:51 PM   #77
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I was afraid of that. it does respond faster tho, but for that darn 4000 point.

Maybe i'll become a sunday driver ;P
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Old 20-09-2012, 05:30 PM   #78
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You can use a celica maf to get around the issue. There's info on m247 that will about it
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Old 20-09-2012, 06:18 PM   #79
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i guess i should say i have sold this car and moved on to something that was more practical for my needs of my job. a 2006 BF XR8 ute.
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Old 20-09-2012, 06:51 PM   #80
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cheers, i shall have a looksee
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