[T3] Weird Idle Dips

[jeffrey gunnarson]

Hi guys. This is a funny thing that happened to me. After doing a sunup on
my 73 bus it had the same probs. Had just changed plugs points and
condenser.and it ran but not well. The problem was the new points were bad.
Last thing I would have expected.one way that helped me find the prob.was
the timing mark was all over the place while using the strobe .not
steady.my part guy said bad sets of new points are becoming more prevalent.
I tried another set of points and it solved the prob.weird!  New bad
points.who would have guessed that?  Not me. Gunnie
On Mar 1, 2012 9:17 PM, "Jim Adney" <jadney at vwtype3.org> wrote:

> On 1 Mar 2012 at 15:03, Chris Sheridan wrote:
>
> > >Condensor: Buy genuine Bosch; use an old one in preference to a new
> > >one. I have never seen or heard of a bad Bosch condensor.
> >
> > I was taught that points and condensor wear together and points should
> > Never be replaced without also replacing the condensor, as it introduces
> > an unnecessary variable when troubleshooting.
>
> Condensors don't "wear." Condensors used in electronics are called
> capacitors, and they can be made with several different kinds of
> construction. Basically it's a question of what kind of insulator
> they use. I've replaced plenty of failed capacitors in electronic
> equipment over the years, but none of them have had the kind of
> construction that's used in automotive ignition systems. I've never
> seen a bad ignition condensor. Have you?
>
> I know lots of people share your opinion, and it's possible that in
> some brands, condensor failure is real. I've just never seen with
> Bosch condensors.
>
> > >Ignition points: I take them out and inspect them. If they are badly
> > >worn, I'll sometimes file them to get to fresh metal.
> >
> > I used to do this when I fixed bugs and buses in the ghetto where we
> > couldn't afford tune up parts, and it usually backfired (pun intended) on
> > us because we couldn't never eliminate faulty ignition parts when trouble
> > shooting running/starting problems. I made a vow never to reuse points un
> > less I was literally stranded. For that I keep a point file in my toolbox
>
> I agree that reusing points is more iffy. I don't replace them often,
> but when they get bad they generally get thrown out.
>
> > >Spark Plugs: Here's where I think we get to the root of your actual
> >
> > >problem. You say you've been using the recommended high speed plugs,
> > >and that's probably your mistake. People tend to read that and think
> > >it will translate into better performance.
> >
> > Nope I just continued what the previous owner had in there. I always
> > ran W8AC and W8CC on my buses. I suppose I can try W8AC's next tune
> > up.
>
> Very few people understand what it means to run a cool plug. It's a
> very common mistake, and one that I used to make, too. W8CC's are the
> extended tip, right? If so, they might be worth a try. Same heat
> range, but the extended tip puts the spark out closer to the middle
> of the mixture. I know I tried the extended tip plugs for a few
> years, but I couldn't tell any difference, and they were hard to
> find, in the right thread and heat range for our VWs. So I've just
> gone back to the W8AC or W8AP.
>
> --
> *******************************
> Jim Adney, jadney at vwtype3.org
> Madison, Wisconsin, USA
> *******************************
>
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