Afm Cleaning.. Just Rip It Out Open It And Spray Away?

[GTAAAH]

Searched for: AFM= 0 results, Air Flow Meter = 5 pages, checked em all out only about 3 helpful

Hey unhappy with the way the car is performing and have just tried:

New pump

New filter

Checked voltages and contacts on all coil packs

Regapped NEW iridium plugs to .8mm

Done full ecu and o2 diagnostic check.. Both of which were fine

And so am left with a few options, 1 i can do tonight is cleaning the AFM

So i read from GTST a while ago that you just grab a Can of wd40 and spray the AFM.. But where on the AFM? Open it up and spray inside the box? Pull it off the intake piping and spray something on the bottom? Where abouts?? Also is there any tests i can do to see if this thing running correctly? Like with a multimeter for example?

Or just gimme a link that has answers to both these questions, if u can find 1.. gl;

Edited July 1, 2006 by r32 gts-turbo

[Konrad]

I cleaned mine a couple of weeks ago, you need to get yourself some electrical contact cleaner, pull off the afm by taking off the hoseclamps and disconnecting the plug (be careful as sometimes the electrical connectors can crack easily if the plastic has aged bad). Give the whole inside of the afm a liberal coating (or if you're like me it was more like 6 coats lol) of contact cleaner, focusing on the hotwire sensor itself (thats the bit that sticks out).

Leave it out to try for maybe 20min in the sun, give a final visual inspection to make sure you're happy it looks clean, then reinstall. Some people choose to remove the protective mesh that covers the inlet and outlet sides of the afm but i really dont think it would be a restriction...its there to stop nasty stuff from being sucked into the inlet if you're filter falls off or something.

As for testing there is a way to do it with a multimeter, but i dont know the procedure. I have a blitz r-vit that tells me afm voltage, since it plugs into the consult connector i assume any consult interface would do the trick if you have access to one

Hope this helps

[GTAAAH]

yeh dude that helps a heap, ill have to go raid my cupboards for something other than wd40 i suppose as you use that to losen things;

Edit - Gonna go with the metholated spirits option

Edited July 1, 2006 by r32 gts-turbo

[GTAAAH]

cool nvm sprayed it with metho, duno if itll help tho coz its not like any dirt is dripping off or ne thin

Edited July 1, 2006 by r32 gts-turbo

[D-limo]

I'm very interested in how to test as well..

[MANWHOR3]

If you have an oiled pod like I used to, clearning it works wonders.

Basically, if I ran my finger on the inside of the AFM (not on the element obviously), but on the black plastic bit, there was a greasy film, which was also black and dirty, since the pod let through quite a bit of dirt.

A can of cc at dickos is like $20. I just bought the big one. hit the element with it every few seconds. as a plus side, it also dripped onto the bit around the outside and cleaned that too.

[R31Nismoid]

Did you check General Maint. section?

http://www.skylinesaustralia.com/forums/in...showtopic=18037

[walkoau]

i have always found contact cleaner the best for cleaning the airflow meter in all cars.

[Botters]

I posted this a few days ago

Ive only just purchased my skyline about 2-3 weeks ago and i have noticed that when accelerating it seems to get more boost and accelerate quicker when i push the accerator to about 3/4 of the way in, and when i put my foot flat down i get less boost and slower acceration than at 3/4. Is this normal or is there an easy fix to this problem???

then someone replied

I had the same sorta problem a while back when I first got my 33. Ran so much better at 1/2 to 3/4 throttle but ran like shite on full. Turned out my afm was shot. Maybe try swapping with someone to see if that fixes it. Is there a massive mid range flat spot that seems to clear about 6k? Thats what happened to me anyway... ran way too rich.

This sounds exactly the same as my car.

Do you think cleaning the AFM would fix this??? Or do AFM f**kup all the time and need replacing?

[Spook's_Skyline]

mmm, i used contact cleaner to clean my afm

since ive done it, ive noticed the engine warning light flashing briefly at high rpm

no knocking or anything (checked on pfc)

when i did clean my afm, a shit load of dark gunk came out of it and i run a pod down low behind my front bar

getting it all checked out in a week or two

[benl1981]

botters - youre problem may be due to running too muchboost or airflow that is causing the ecu to richen up and retard timing..

[B0oStEr]

yeh dude that helps a heap, ill have to go raid my cupboards for something other than wd40 i suppose as you use that to losen things;

Edit - Gonna go with the metholated spirits option

What made you think it needed cleaning.

If no dirt came out of it then chances are there is a fault somewhere else.

AFMs can be tested by checking the resistance between pins but I have found this unreliable because the problem is almost always dry solder joints between the pins and the circuit board.

Dry solder joints typically give an intermittent fault so may test fine then play up when you refit it.

Then again the problem might have nothing to do with the AFM.

[GTAAAH]

My AFM looked pretty much perfect, but i sprayed it out anyway

No difference for me unfortunately, so i gotta try something else i guess

Didnt see that section in the general maintenance, thx, forgot stickies dont come up in searches

[TTT]

So i read from GTST a while ago that you just grab a Can of wd40 and spray the AFM

When did I ever say WD40?

I have said “Degreaser” many times.

When I did mine, I did it with degreaser then hosed it out (low water pressure), then shook it dry, then dried it out properly with hair dryer.

[PHATR32]

hang on a minute, you wernt happy with the cars performance so you just started changing random stuff??

have you though about tracking down the exact problem? if there is one?

steve

[GTAAAH]

Ohh yeh, degreaser degreases, wd40 gets crap unstuck, mixed up somewhere there

PHATR32, There is a randomly occuring problem, changing in severity just as randomly and i am piece by piece replacing/changing/"fixing" different things that have been suggested to fix it. Cant think of any other way to do it.. I have been to different mechanics and there guesses are sorta random, unusual and costly so i was doing all the cheap stuff people have suggested for me to do

Edited July 4, 2006 by r32 gts-turbo

[PHATR32]

oh ok, just wondering.

anyways, i used meth on my one. might help to get a clean spray bottle and spray the metho directly onto the element. let it dry then spray it again.

you pulled any error codes? might give you a clue? good luck with it.

steve

[PHATR32]

also check this out, it shows rb26 afms but should work on any one.

mine had random problems till i had done this

http://www.skylinesaustralia.com/forums/in...284&hl=afm*

steve

[GTAAAH]

Yeh i used meth on mine to

got code 55, which means all ok so no probs there, ill give that guide a reading, thx.. Hmm, didnt think it could be a connection problem.. Will be difficult to borrow some ones AFM so ill open it up tomorrow, check if the connection is sketchy and then get my auto electrician to resolder em

Edited July 4, 2006 by r32 gts-turbo