vegener at post7.tele.dk
Mon Feb 25 15:41:55 EST 2002
I have "done" 2 sensors.
1. time just happen
2. at new-installed engine on a testrun without airfilter.
The oil vapour from the outerside of the engine just spoiled the maf sensor.
Symptoms: Very fat running and smoking
----- Original Message -----
From: "Arun Rao" <rao at pixar.com>
To: "Chris Covington" <malth at umich.edu>
Cc: "Brett Dikeman" <brett at cloud9.net>; <200q20v at audifans.com>
Sent: Monday, February 25, 2002 3:30 PM
Subject: Re: maf cleaning
> When my MAF sensor went, the symptoms were vaguely similar, but I don't
> think it even reached 1.3 bar. Besides, the check engine light went on,
> and the fault code unequivocally indicated a faulty sensor. So the
> first thing you should do is to dump the codes.
> Hope that helps.
> Brett Dikeman wrote:
> > At 12:27 AM -0500 2/25/02, Chris Covington wrote:
> >> Rumor has it that my 1.0+ bar boost bucking problem could be a dirty MAF
> >> corrupted by my K&N panel filter. Could someone describe how to "clean"
> >> the MAF, or do I potentially need a new one?
> > They can't be cleaned, unless the buildup is recent.
> > Why? Because each time you shut off the car, the thing heats the
> > wire up to may hundreds of degrees, burning any residue.
> > Note I didn't say burning OFF any residue.
> > The majority of oil, dust, etc may get vaporized, but enough gets
> > left behind. Someone(Brandon, I think) sent me a toasted MAF sensor
> > once, and I looked it over to see if in fact it could be cleaned.
> > I tried 6 different solvents/cleaners with a q-tip and was able only
> > to get a slight residue removed from the wire.
> > A MAF sensor failure would be fairly exotic. I would look for an
> > intake system leak, such a loose hose clamp, or a busted Samco
> > hose(yes, I think that split is all the way through.)
> > Given your comments about the Samco hose, that's the first place I
> > would look. Basically, 1.0bar indicated is a lot more(probably
> > around 1.2-1.3) on a chipped car w/different pressure sensor. .8
> > displayed = 1.0 Bar real-life. The shuddering is caused by the
> > flapping of the split or loose hose. The hose is doing a "motorboat"
> > and thus you get the shuddering as that metered air escapes.
> > Brett
> > --
> > ----
> > "They that give up essential liberty to obtain temporary
> > safety deserve neither liberty nor safety." - Ben Franklin
> > http://www.users.cloud9.net/~brett/
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