Hi !!!
So I've cleaned the MAF(it wasn't very dirty, just a little bit) but
the error P0170 comes back again.
As I said there is no problem when I drive normal(in gear). Only when
I have no gear(at idle) the error appears, but it doesn't occur every
idle-period. For instance I drove this morning 80 KM and the error
P0170 has come 2 times at idle, I had maybe 10-15 idle-periods.
So, I suppose it's the idle valve but it cost 200,- and maybe I'm
risking with it.
Any advice should be useful !!! Thanks !!!
Regards,
Dorin
--- In opendiag@yahoogroups.com, Martyn Harrison <expendable1@4...>
wrote:
> Definitely, yes.
>
> Mine is a fist-sized cylinder with a pipe in the middle, can just
see the pair
> of wires in the pipe. The easy way to clean mine is to undo the
screws on the
> back of the sensor unit, withdraw the piece that goes into the tube
and the
> wires are then vulnerable and exposed.
>
> They're not particularly fragile but as breaking one means a whole
new unit I
> try not to touch them and instead, a can of carb/injector cleaner
(the sort
> that leaves no residue, but I suspect that is all types) is used to
squirt onto
> the wires so they end up shiny and bright metal.
>
> Then put the sensor back in and screw up. Takes about 30 seconds
and I do mine
> once or twice a year as it seems to be getting dirty again by then.
It's also
> possible to squirt the cleaner into the tube having removed the
whole thing
> from the ducting, but this is more bother.
>
> AFAIK garages don't bother cleaning them and instead, wait till it
is reading
> really inaccurately and get you to buy a new one, since they get
money on the
> parts as well as the labour to change it.
>
> They will go wrong, in about five years, depending on conditions.
Pollen, dust,
> etc, it all is sucked over the wires and because they are hot, this
stuff
> sticks onto the wire, but because they're not very hot, is not
burned off. So
> month after month, the wires get dirty, require more current to
keep them warm,
> tell the EMS there is much more air entering the engine so it pumps
in far too
> much fuel, and eventually the EMS declares a sensor fault as the
figures go
> outside the rationality check and the "check engine" light comes on.
>
> But instead of 300 euros of parts and labour, a one euro can of
carb cleaner
> and a few squirts into the end of the tube and it all returns to
normal again:
>
> before http://www.fordscorpio.co.uk/images/maf1.jpg
> http://www.fordscorpio.co.uk/images/maf2.jpg
>
> after http://www.fordscorpio.co.uk/images/maf9.jpg
> http://www.fordscorpio.co.uk/images/maf10.jpg
>
> (engine, air temp, etc, all identical.)
>
>
> On Wed, 10 Aug 2005 13:24:50 -0000, "cj97dip" <dorinpavel@h...> is
said
> to have said:
>
> >Hi,
> >
> >Do you mean the "mass air flow" ? Are we allowed to clean this
part ?
> >
> >REGARDS,Dorin
> >
> >--- In opendiag@yahoogroups.com, "smit3207651" <smit320@z...>
wrote:
> >> Hi,
> >> Mayby its the MAF(dirty).
> >> A well known problem.
> >> You can try a other whan.
> >> Or you can try to clean it .
> >> Use a brake or carb cleaner that dont leaves resedue.
> >> And be careful with the tiny inside parts when cleaning.
> >> Mario.
> >>
> >>
> >>
> >> --- In opendiag@yahoogroups.com, "cj97dip" <dorinpavel@h...>
wrote:
> >> > Hi,
> >> >
> >> > So I drove with my tester connected to the car and discovered
the
> >> > following staff: as I drive normal there is no problen, as
soon
> >as
> >> > the motor is in idle status(no gear) comes (I could say
always)
> >> the
> >> > error P0170.
> >> >
> >> > That means the electronic-idle-valve is wrong, or ?
> >> >
> >> > What should I measure ? Thanks !!!
> >> >
> >> >
> >> > Regards,
> >> > Dorin
> >> >
> >> >
> >> > --- In opendiag@yahoogroups.com, "Christian Hack"
> >> <christianh@e...>
> >> > wrote:
> >> > > You said you only "checked" the lambda sensor and it was OK.
> >You
> >> > haven't
> >> > > explicitly said you changed it. How did you "check" it?
> >> > >
> >> > > Could be airflow meter as well.
> >> > >
> >> > > Vacuum leaks anywhere else?
> >> > >
> >> > > > -----Original Message-----
> >> > > > From: opendiag@yahoogroups.com
> >> > > > [mailto:opendiag@yahoogroups.com] On Behalf Of cj97dip
> >> > > > Sent: Monday, 8 August 2005 11:42 PM
> >> > > > To: opendiag@yahoogroups.com
> >> > > > Subject: [opendiag] Re: BMW motorlamp
> >> > > >
> >> > > >
> >> > > > Hi Leslie,
> >> > > >
> >> > > > Of course I performed a "clear errorcodes" after that.
There
> >> was
> >> > no
> >> > > > error but only for 100Km, no more. After 100Km was P0170
> >> stored
> >> > > > again. That means there is further a wrong part in the car.
> >> > > >
> >> > > > I thank you for help. Could anybody answer me, thanks !!!
> >> > > >
> >> > > > Regards,
> >> > > > Dorin
> >> > > >
> >> > > > --- In opendiag@yahoogroups.com, "Leslie Mirasole"
> >> > <mirasole@n...>
> >> > > > wrote:
> >> > > > > Dorin
> >> > > > > Have you reset the ECU again after you change the Lamda
> >> > > > sensor,because it will still show an error.Also after you
> >> change
> >> > the
> >> > > > hoses.
> >> > > > > Regards
> >> > > > > Leslie
> >> > > > > ----- Original Message -----
> >> > > > > From: cj97dip
> >> > > > > To: opendiag@yahoogroups.com
> >> > > > > Sent: Monday, August 08, 2005 8:11 AM
> >> > > > > Subject: [opendiag] Re: BMW motorlamp
> >> > > > >
> >> > > > >
> >> > > > > So, i've changed all the 6 hoses from the vacuum pump
and
> >> the
> >> > > > error
> >> > > > > P0170 comes back !
> >> > > > >
> >> > > > > Again the error maning: P0170 = Fuel trim malfunction
> >bank
> >> 1.
> >> > > > >
> >> > > > > Could somebody help me ? It is very important,
thanks !!!
> >> > > > >
> >> > > > > regards,
> >> > > > > Dorin
> >> > > > >
> >> > > > >
> >> > > > > --- In opendiag@yahoogroups.com, "cj97dip"
> >> <dorinpavel@h...>
> >> > > > wrote:
> >> > > > > > Hi,
> >> > > > > >
> >> > > > > > Thanks, I've just checked it(the lambda sensor) and
> >it's
> >> > ok !
> >> > > > > > On the other side so far as I know that oxigen
sensor
> >> when
> >> > is
> >> > > > wrong
> >> > > > > > should bring another error.
> >> > > > > >
> >> > > > > > Maybe anyone has an idea ? I'll change all hoses
from
> >> the
> >> > > > vacuum
> >> > > > > pump
> >> > > > > > while they look bad.
> >> > > > > >
> >> > > > > > I thank you !!!
> >> > > > > >
> >> > > > > > Regards,
> >> > > > > > Dorin
> >> > > > > >
> >> > > > > >
> >> > > > > > --- In opendiag@yahoogroups.com, Mirica Alexandru
> >> > > > <alexmirica@y...>
> >> > > > > > wrote:
> >> > > > > > > Check Lambda sensor in the exhaust pipe.
> >> > > > > > >
> >> > > > > > > --- cj97dip <dorinpavel@h...> wrote:
> >> > > > > > >
> >> > > > > > > > Hi,
> >> > > > > > > >
> >> > > > > > > > I drive a bmw 316i 77KW 08/1999. Now my MIL lamp
is
> >> > > > > > > > on and i've just
> >> > > > > > > > read the failure from ECM(DME).
> >> > > > > > > >
> >> > > > > > > > It came one error: P0170(fuel trim malfunction
bank
> >> > > > > > > > 1).
> >> > > > > > > >
> >> > > > > > > > I've tried to change the vacuum hose, but after
> >> > > > > > > > 100Km the error comes
> >> > > > > > > > back. What else should it be ?
> >> > > > > > > >
> >> > > > > > > >
> >> > > > > > > > I thank you a lot, Dorin
> >> > > > > > > >
> >> > > > > > > >
> >> > > > > > > >
> >> > > > > > >
> >> > > > > > >
> >> > > > > > > __________________________________________________
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