[T3] On a 73 T-3 SB fuel injected aut trans pinging .

Dave Hall dave at hallvw.clara.co.uk
Fri Dec 8 18:07:08 PST 2017

I understood the slow reduction in rpm was to reduce the emissions, but I've
been wrong before. ;-)

UK VW Type 3&4 Club

-----Original Message-----
From: type3-vwtype3.org [mailto:type3-vwtype3.org-bounces at lists.vwtype3.org]
On Behalf Of Jim Adney
Sent: 05 December 2017 23:03
To: type3 at vwtype3.org
Subject: Re: [T3] On a 73 T-3 SB fuel injected aut trans pinging .

On 5 Dec 2017 at 13:15, William J wrote:

> When you close the throttle the timing should return to 5 BTDC right 
> away shouldn't it?

In cases like this, it doesn't always. That's because the advance increases
the RPM, which holds the advance up, and the advance being in play keeps the
idle up. So you've got a vicious circle.

Try lowering the idle speed a bit.

Jim Adney, jadney at vwtype3.org
Madison, Wisconsin, USA

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