AFM problems

[BenA31]

Welll i finally got around to trying to diagnose a stalling, running rough symptom i've been having with my car which caused me not drive it for the last week.

well luckly its been the first thing i've checked was the AFM

i disconnected it and tried running the car to see if the idle would still be rough, and it ended up idleing fine which has made me believe the AFM is at fault. I've also swapped it with a mates AFM which ran pretty much fine.

The AFM which l think is the problem is from a Non Turbo r32 but still has green label. Would that be the reason its messing up or is it just stuffed?? Does anyone know the model number of the rb20det AFM so i can double check its the same?

I tried giving it a clean with the CFC contact lense cleaner which helped slightly but not fully.

[x2shy]

I will have one for sale this week if you want it. Or at least just borrow it.

[Steve]

does it still have the mesh?

[croat]

How do you clean an AFM? My one is maxing out on my 33gtst and stops me from running high boost in the 4500+ rev range... Just like to know what do you clean? Do i have to open it up?

[druzilla32]

spray the sensor with electronical contact cleaner until all the black crap is gawwwn

[croat]

sweet thanks.

[Cubes]

Did the clean prevent the afm cut over 4500rpm+?

I never used to have an issue running 1 bar in 3rd+ gear. Now it afm cuts.

Steve,

I have removed the mesh and noticed a crappy idle..

Mesh Removal = Not recommended.

[BenA31]

yeah from experience don't remove the mesh.

Well my problem is now fixed. Firstly tried cleaning it, which failed to work, so got my hands on another AFM, and now it runs so much better and even now has a stable idle.

Though even better was that i've also just replaced my O2 sensor, spark plugs and regapped to 0.8 , coolant temp sensor, and cleaned out my ACC valve, and holy shiet, it runs so much better. Very pleased now!!

[Cubes]

What kays to a tank of juice are you getting for general running about with the new O2 Sensor? before and after.

[BenA31]

What kays to a tank of juice are you getting for general running about with the new O2 Sensor? before and after.

Dunno yet as only put it in last night. Do you think i should notice a difference in fuel consuption? i'll keep an eye out on that.

[Cubes]

Depends if the old O2 sensor was stuffed.

I get just under 500km's to a tank with general running about. All within 50-80km' areas.

I've always used Nulon Total Fuel System Cleaner in the past however lately I hadnt. It dropped to just over 400km's to a tank, I used a bottle of Nulon Total Fuel System Cleaner winthin a tank or two it brought the economy back up to just under 500km's per tank.

It appears I need to use that Nulon stuff every 6 months otherwise my fuel consumption starts to drop.

[EnricoPalazzo]

mesh removal may make the idle slightly erradic.

[GTRman1992]

My AFM had dry joints on the connector inside it. Re-heated with soldering iron and all is now good.

[deano_82]

might check my afm tonight for dry joints something i havent looked at!!

[BenA31]

what the hell is dry joints? i'm guessing bad connections where the solder cracks?

[Steve]

correct