Cleaning the Maf

[ova50]

How often should this be done?

I was reading in an old thread by "YNOT" about the Maf
( http://www.nissanpatrol.com.au/forums/showthread.php?597-Checking-and-cleaning-MAF-sensors&highlight=cleaning )
Excellent Thread too, and makes mention of disconnecting the battery for some time.

Is this required or is the battery disconnection only to clear fault codes?


:cheers:

[threedogs]

I clean about once a month, I don't disconnect the battery as I have a ECU-talk.
but good practice I think if you've been having limp mode problems.
I think you should include it in any maintenance schedule, its is after all one of the quicker jobs to do

[the evil twin]

Not much point cleaning a MAF any more frequently than 20 thousand K intervals but as it is only a 10 minute job no biggee.

Probably 99 percent of them go their whole lives never being cleaned.

[P4trol]

The engine modifies the way it runs depending on the information it receives from maf sensor. If the maf sensor is dirty, it sends wrong information to the ecu. The engine slowly adjusts it's values (it thinks it is doing the right thing).

When you clean the maf sensor, the engine will adjust accordingly, with time and distance. But you don't want it to adjust slowly, as it is adjusted for the false maf sensor readings. So you disconnect the battery for 5 minutes or so.

This resets the ecu learned settings back to a rough default. You might notice the idle a little rough when it is restarted. This is the engine learning the settings from scratch. The adjustment takes several seconds to coarsely do this. The fine tuning takes a few km more. Mine takes 150km before the fuel usage settles down and it accelerates nicely.

So it will adjust without it, but the battery reset will hurry it along.

[ova50]

Thanks for the info.
Will take it out and give it a clean.
:cheers: