Cleaning MAF

[andy 0]

People have said MAF can get caked with oil etc when using induction kits, is it possible to clean them?

[VRmonster 1]

yes it is, but it will normally work for a day or two then pack up. lol. also they are probably the most delecate, and most expensive things to replace, on your car. ive never tried it. but i beleive some people have with no luck.

[Mangold 0]

I've cleaned mine before by using a garden type water sprayer/mister filled with isopropanol. Remove it from the car and then spray the fine wire thats inside to remove deposits. You wanna make sure its nice and dry before using it again though. Doesn't take long as it evaporates pretty quick.

[acf8181 0]

whats the symptoms if its screwing up?

[FishWick 21]

On my OBD1 NAFF, I use cotton buds with Isopropynol too. Just very gently wipe the platinum wires to remove the crud. These type of MAF have a cleaning cycle that's supposed to clean the wires by heating them to 1000 degrees C for a split second. Not sure how well it works though, it probably just bakes the K&N oil onto the wires even more!

Symptoms of a dead NAFF include:- poor throttle response, hesitancy, very bad idle, poor mpg and a general lack of urge.

K

[Geastb 0]

Symptoms of a dead NAFF include:- poor throttle response' date=' hesitancy, very bad idle, poor mpg and a general lack of urge.

K[/quote']

Mmm sounds a bit like my car! Where can a get a new or good s/h MAF?

[jcorallo 0]

by the by, Maplins sell Isopropanol Electrical cleaner (its what I use in my water injection! ) - you are supposed to be able to give the electrical item a good drenching in that stuff I think, and then just let it dry off.

Never tried it though - I alwayts wondered if it would actually ever dry out if it got into a supposedly sealed part of the MAF electrics?

Dont let it get on your skin though - its quite toxic...

Jules

[madmonkee 0]

i use acetone. Just as good

[VRmonster 1]

guess im off to maplins for the weekand then. is this ok to use on the isv too?

[FishWick 21]

Use carb cleaner in the ISV followed by a quick spray of silicon maintanence spray. The trouble with the VR ISV is the internal vane occassionally jams because it sits above the exhaust manifold, absorbing tonnes of heat. Check the scoring on it when you take it off! Another remedy the VR really enjoys is a clean up of the throttle butterfly with carb cleaner.

A good source for MAFs is a local bosch distributor. Bosch direct only charge you £150 exchange for a MAF, as opposed to £321+VAT from VW.

You can test the MAF by doing the following:-

When at temperature and idling, pull the MAF plug off. The engine should stammer and die. If it doesn't, the ECU has bypassed it and is using the throttle sensor instead to give you a crude and over-fuelled mixture.

If you unplug the MAF and the idle remains the same, take it for a drive and if it feels no different, the MAF is dead. If it drives like shit, the problem lies elsewhere.

[ Edited Fri Jun 11 2004, 06:52PM ]

[maak 0]

Duh! I'm a big thicko here, but is the MAF on the left hand side of this pic, halfway down?

cheers

[FishWick 21]

Yep, it's the thing with the connector on it, above the blue hose. Where did you get that blue hosing for the Schrick plumbing from? Looks cool!

[VRmonster 1]

cool, at leat i know my maf aint dead yet, lol. mine cuts out. anyway, must clean the isv cos shes starting very badly. and i may also clean the tb while im at it.