RE: RE: [engine] idle hunting...

["Fry, Larry" <LEF@chem-tronics.com>]

DanRabbitSportTruck-
  What do you see when you are watching those gages?  I mean, is the oil
pressure normal and the lifters still tap? (bad lifters) Or is the oil
pressure down, even at above-idle rpms? (bad oil pump)  You should have
about one bar OP per 1000rpm.....when at normal operating temperature.

Larry  sandiego16V

-----Original Message-----
From: Dan Bubb [mailto:jdbubb@ix.netcom.com]
Sent: Friday, October 19, 2001 3:33 PM
To: danws69@earthlink.net
Cc: 'roc E-mail'
Subject: Re: RE: [engine] idle hunting...


I'd say if you have to "get some good rpms on a straight-away." then you
have some problems. Either the lifters are trash or the oil pump is trash.
Just raising the RPM to a normal idle speed should stop any lifter noise if
everything is OK.
Dan

----- Original Message -----
From: dan <danws69@earthlink.net>
Cc: 'roc E-mail' <scirocco-l@scirocco.org>
Sent: Friday, October 19, 2001 1:59 PM
Subject: RE: RE: [engine] idle hunting...


> yeah, what he said.... :)
>
> If the rpms don't drop from the time I hit the key, it won't tap, but if I
> come up to a few stop lights in a row and my car semi-stalls, then it taps
> for a while until I have a chance to really get some good rpms on a
> straight-away.
>
> I didn't mention that I do have gauges I watch ALL the time.
>
> Dan
> '81 Rabbit Sport Truck
> '87 16v Scirocco
> '00 Jetta
> Tam-pa, FL
> http://home.earthlink.net/~danws69/index.html
>
> -----Original Message-----
> From: Neal Tovsen [mailto:res00ffj@verizon.net]
> Sent: Friday, October 19, 2001 13:10
> To: Fry, Larry
> Cc: danws69@earthlink.net; roc E-mail
> Subject: Re: RE: [engine] idle hunting...
>
>
> But what Dan's describing is oil starvation from the RPMs falling so low
> (near 0). This describes lifter tapping (the correct term is "cam
follower"
> on an OHC engine), and has nothing to do with the block. However, if the
> tapping doesn't immediately go away when RPMs go back to normal, it may
> indicate new lifters are needed or that his oil pump is weak. Neither are
> terribly difficult or expensive, but that's another story and I presume
> isn't the problem...
>
> Neal
>
>
> >
> > From: "Fry, Larry" <LEF@chem-tronics.com>
> > Date: Fri, 19 Oct 2001 08:56:41 -0700
> > To: danws69@earthlink.net, "roc (E-mail)" <scirocco-l@scirocco.org>
> > Subject: RE: [engine] idle hunting...
> >
> > lifters tap....rods knock.  Sounds like you will be rebuilding the lower
> end
> > soon.
> >  I've been chasing the same idle problem since I bought my "87 16V two
> years
> > ago.  If you uncover the cause, let the list know!
> >
> > on the same post; my in-car voltmeter reads one volt lower than my
> > multimeter says the batt/charging voltage really is (e.g. 12.5V vs.
> 13.5V).
> > Anyone got the reason/fix?
> >
> > Larry  sandiego16V
> >
> > -----Original Message-----
> > From: dan [mailto:danws69@earthlink.net]
> > Sent: Friday, October 19, 2001 8:18 AM
> > To: roc (E-mail)
> > Subject: [engine] idle hunting...
> >
> >
> > ...are there any on-line tech procedures done for this subject yet? I've
> > heard some talk about an air/bypass valve? I recently had that funky
> 2-piece
> > hose crap out on me, and aside from the high idle, it wasn't doing this
up
> &
> > down crap.
> >
> > My current situation is:
> > -car starts fine
> > -when coming to a stop sign/light, rpms drop (alt light comes on
briefly)
> > rpms rise to 2000, if I don't tap the gas, it'll drop way low and die.
> >
> > NOW GET THIS:
> > If I have the a/c on, idle is PERFECT. Luckily I'm in Florida, but
> > occasionally we get nice weather...
> >
> > I really HAVE to fix this because of the side effects of the idle
problem:
> > -when it drops super-low my oil pressure drops too low and then I get a
> > scorching case of lifter-knock.
> > -alternator stops charging properly, it charges, but not at the level
that
> > it started at (i.e. 10.5~11 VDC) - (yes, I've verified my gauge by
> sticking
> > my multi-meter on the battery terminals).
> >
> >
> >
> > Sorry for the longer-than-usual post from me.
> >
> > Dan
> > '81 Rabbit Sport Truck
> > '87 16v Scirocco
> > '00 Jetta
> > Tam-pa, FL
> > http://home.earthlink.net/~danws69/index.html
> >
> >
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