How-to clean your AFM

[MerlinTheHapyPig]

i wouldn't stress too much, just spray the crap out of it.

I used brake cleaner.

Someone suggested to use carby cleaner, it is more or less the same as brake cleaner but it has stuff to dissolve grease/oil as well. Though someone told me recently _not_ to use it because it leaves a residue.

I'd play it safe and use brake cleaner. It doesn't matter which direction you spray it from.

[Johnny Cash]

Yeyah, cleaned the AAC and the AFM, now she purrs like a kitten.

Just hope it stays that way.

Thanks everyone

[WazR32GTSt]

[Johnny Cash]

Don't you know it... and I was getting ready for a real battle to work out what it was.

That said, I'm still gonna be cautious for the next few days, and see if I can get it to stall. I had a bit of a shock when I put everything back together and the car started idling from 1000-2000rpm. I thought 'great, now I've really fixed it.' Turned out I hadn't plugged the AFM plug all the way in. Plugged it in and hey presto!

[SLIPPERY]

i used a combination of metho and kero and it cleans the oily film off the afm as soon as it comes into contact with it. being a spirit, it also evaporates and doesnt leave a residue

plus, you can buy it cheap at hardware stores

was getting over 600km to a tank in my former GTS-T

[Johnny Cash]

meh, im happy enough if it doesn't stall. 600km to a tank sounds inviting, but I'm willing to settle for a car that works.

If I wanna be economical, I can drive my wife's excel...

[R32Abuser]

Wat about WD40?>?

[markimak]

haha mate thats a good one. WD40 is a lubricant not a cleaner. useing that will give interestedin results. i use carby cleaner and electrical cleaner.

[R32Abuser]

Well i used it anyway, as i figured even if it left a residue then id be able to get it off using carby cleaner anyway. Seemed to make the car a little bit more smoother to drive, but im not sure whether the hesitation i have been getting is gone or not. Made sure i blew out as much of the WD40 as i could with an air gun. Will have to see on whether this has owrked or whether it was my o2 sensor!

Cheers, David

Edited September 18, 2006 by R32Abuser

[markimak]

hey mate.

becareful using a air gun on that. it has a thin wire that snaps easially. its is really doughy down low? then prob is ur O2

[R32Abuser]

Nah not overly...a little tho...What happens is ill be on like maybe cruising throttle position whilst accelerating softly to 60 and in second or or third it all of a sudden cuts out and starts rolling as if its going to stop...2 seconds later...it jerks and fires up again and all is sweet. I must say tho, it does feel even when cruising that the engine is under more load than it should or used to feel like....

AANY ideas? Im leaning towards the the o2 sensor..but anyone had similar troubles with different outcome?

[cowie165]

Hi mate. I'd place money on it being the AFM, but not the element/hot wire but the plug/connector. I had the same problem with one of my AFMs. The joins inside the plug go dry, causing the resistance to go sky-high (to infinity), which results in the voltage dropping off to zero. The ECU doesn't know what to do and you end up with the rough running for a few seconds until it jiggles around and you have a voltage across the plug again.

You can test for it with a Consult cable.

You can fix it by either replacing the AFM (but hard to check which one it is without a Consult cable) or by desoldering and resoldering the joins. The job isn't actually that hard, provided you have a desoldering tool. I'll chase the DIY and post it here.

Mark

[cowie165]

Found it.

http://www.skylinesaustralia.com/forums/in...howtopic=113284

[R32Abuser]

cheers mate! thats awsome ill get a consult unit and test for it...then go ahead with it all

[fr0st]

i used a combination of metho and kero and it cleans the oily film off the afm as soon as it comes into contact with it. being a spirit, it also evaporates and doesnt leave a residue

How'd you do that? Spray bottle with a 50/50 mix of kero and metho?

600km to a tank sounds nice... I managed 8.75L/100km at the pump last time and my AFM hasn't been cleaned in a long time. If I could push it a little further I'd be a very happy man

[DECIM8]

Just a question ..

its been sugested to do a ECU reset... Ive read how to do this but when cleaning the AFM is it nessasary or will it correct over time?

[GeeTR]

Good son of rajab! WD40!? Please don't use WD40. I would personally avoid contact cleaner. Brake cleaner is designed to evapourate completley. Id spray a plate with it, let it dry and eat off of it

If your AFM's hellah visually dirty, carby / throttle body would be best, as its unbelievably powerful at removing carbon deposits, but i would then use brake cleaner to wash it off. Shake the unit gently so most of it spits out, then place in warm spot (vertically on hot cam cover works well) to dry quickly.

I would still be nervous using metho/kero.

Rem, what ever you use once will work and prolly not hurt, but i cant imagine continual use of some of these options would be healthy... reason not to use oiled foam filters ha. Just my opinion.

my 2 cents

-M

[DECIM8]

Well id personally use contact cleaner to clean electronics .. Otherwise I would use 100% isopropyl also drys instantly and designed for electronics...

now .. does anyone suggest a reset of the r34 ecu or not?

[Fixxxer]

Just buy electrical contact cleaner, do it right first time. I had a pretty dirty/oily AFM when I first got the car, the electrical contact cleaner got rid of it in a flash, and dries within a few seconds.

I sprayed it all around the inside of the tube too, cause it was also dirty/slightly oily, ran my finger around the inside after spraying, totally clean

Fixxxer

[markimak]

carby cleaner... TOP STUFF