[T3] On the subject of fuel senders and fuel gauge. Plus afewother questions.

[Mike Fisher]

You would have to ask Tram for the lowdown on it.  He ordered it from
somewhere.

On Sat, Mar 30, 2019 at 6:44 PM William Jahn <willjahn975 at gmail.com> wrote:

> Mike are you talking about a new IAD temp sensor?
>
> Sent from Mail for Windows 10
>
> From: Mike Fisher
> Sent: Saturday, March 30, 2019 6:17 PM
> To: T3 List
> Subject: Re: [T3] On the subject of fuel senders and fuel gauge. Plus
> afewother questions.
>
> My '69 FI/AT starts better cold & runs better with a new temperature
> sensor!
>
> On Sat, Mar 30, 2019 at 6:13 PM William Jahn <willjahn975 at gmail.com>
> wrote:
>
> > I tried plugging in the IAD sensor then unplugged the TPS . It’s
> difficult
> > to describe the result. With the TPS unplugged it didn’t idle very well
> and
> > I get the same miss with the IAD plugged in as before with the TPS
> > connected or not, it’s just over all worse and more difficult to tell
> with
> > the TPS unplugged. It just runs better with the IAD sensor unplugged . It
> > just does run very good at all with the TPS unplugged / I just did this
> for
> > idle . I think it needs the TPS park position to idle proper . If I tried
> > to open the throttle TPS unplugged it just struggles then quits so I
> can’t
> > tell if it has the unstable RPM as I do with the IAD sensor unplugged .
> The
> > issue with mine happens when it’s warm to full temp , I can’t feel it
> > driving under a load with the sensor plugged in yet with no  load the
> idle
> > is not stable. Although with the IAD sensor plugged in and in drive the
> > idle is not stable the engine RPM’s keep changing at every stop it’s
> > different and I checked and the electric AAR is closed . It’s close to be
> > called hunting just not as drastic. With everything plugged in the RPM
> > drops 200 PRM  and if I raise it adjusting the IAD bypass then it becomes
> > unstable and can idle @ 800 RPM to 1,200 RPM. It seems there is a vacuum
> > leak somewhere like the extra % of fuel the unplugged IAD temp sensor
> > compensates for. Even when it’s warmed up with that sensor plugged it I
> can
> > feel and hear this miss at the tail pipe , it’s not a steady miss like
> one
> > cylinder would be it’s random as in it will miss once then I hear 3
> misses
> > . Without  actually  hearing it it’s difficult to put in words. It does
> not
> > seem to be lack of ignition spark and if it is it might be the pertronix
> > yet to me it is more like a lack of fuel . It’s a mystery why unplugging
> > that sensor clears it all up in an instant. That sensors two wires do not
> > have a short and the sensor reads what it should , it drops as it heats
> up
> > and the readings are the same as they always were. Perhaps the sensor
> > inside the IAD is covered in oil and is not getting the proper reading of
> > the incoming air flow, all it needs is heat and it can get that just from
> > the IAD’s temp , that’s just a guess. If I recall on older systems that
> > sensor used oil temp , I thought I read that somewhere.
> >
> > William
> >
> > Sent from Mail for Windows 10
> >
> > From: Jim Adney
> > Sent: Thursday, March 28, 2019 3:01 PM
> > To: type3 at vwtype3.org
> > Subject: Re: [T3] On the subject of fuel senders and fuel gauge. Plus a
> > fewother questions.
> >
> > On 28 Mar 2019 at 14:14, William Jahn wrote:
> >
> > > Ever since then my gauge does not read consistent . If I make a turn it
> > > drops then comes back . I haven´t pulled the sender out yet since the
> > > sender has that cover isnTMt itTMs function to not allow fuel slosh to
> > > affect the float?
> >
> > Yes, that's the function of the cover. Pull out your sender and check to
> > make
> > sure the cover is still attached.
> >
> > >  I´m still trying to figure out why the engine when warm has that
> > > erratic miss and while giving it gas the RPM´s are not steady from
> > > 1,200 RPM to 2,100 RPM with the IAD temp sensor plugged in.
> >
> > Please try the test of unplugging the TVS and see if that cures the
> > staggering idle
> >
> > --
> > *******************************
> > Jim Adney, jadney at vwtype3.org
> > Madison, Wisconsin, USA
> > *******************************
> >
> > _______________________________________________
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> --
> Eugene, Oregon
>
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-- 
Eugene, Oregon

http://s169.photobucket.com/albums/u236/mr_bojangles500/
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