MAF Ground problems on a 91 Classic

[Brian Cembor]

I am kinda new here, but, back in Subaruland we had similar issues with the
MAFs on '99 2.5RS's... which is why Subaru went to MAPs instead....
Anywho... it was diagnosed finally as the filament in the MAF that actually
went bad... do you have a cone filter or CAI? In my experience this is a
common fault for failing MAFs is that the filament "dries out" unlike in a
stock air-box type filter... MAF's are notoriously too sensitive... leading
many manufacturers to move to MAPs...

Just my $.02... I could be wrong

Brian
'92 SE-R
'99 Subaru Impreza 2.5RS RIP

	From:	Dan [SMTP:slamtry@yahoo.com]
	Sent:	Friday, May 17, 2002 3:59 PM
	To:	se-r@lists.deskmedia.com
	Subject:	MAF Ground problems on a 91 Classic

	I am having a continuing problem with my 91 Classic and would
appreciate
	any advice. I regrounded the MAF about 18 months ago so but about
once
	every four to six weeks I get symptoms which appear to be
MAF-related. I
	say this for three reasons:

	1) It exhibits the standard MAF symptoms - stalling at stoplights,
etc.

	2) It thows a code 45 - well known for being caused by MAF problems
	rather than the leaky injectors it is supposed to indicate.

	3) I can temporarily solve the problem by taking off the other end
from
	the MAF, i.e. where the wire is grounded to the motor, and cleaning
it and
	applying dielectric grease. This makes it run great for a month or
so.
	What is weird is that the MAF readings are within spec even BEFORE I
do
	this so it seems strange that it should be the MAF at all. However
the
	incontrovertible fact is that removing, cleaning and replacing the
ground
	end does solve it at least for a while. Am I missing something here?
Could
	it be some other sensor that is causing the problem and it is just
	resetting the ECU that makes it seem like regrounding is solving the
	problem?

	Dan

	Tom Mak <tmak26b@snet.net> wrote

	>Hey guys, I recently soaked my MAF plug with contact cleaner
because i
	>am suspecting a bad ground on there.  I have a 94 G20 btw.  Well it
SEEMS

	>to take care of the problem for a little bit, but it went bad
again. Now
	>my question is.  If I want to do this job permanently.  Do I have
to
	>reground the plug itself, or is the problem originated from the
ground
	>plug at the other end or something is wrong with the wire/  I want
to do
	>the wire, but i am confused at how i should do it.

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