Date:         Sun, 21 Jan 2007 08:35:18 -0800
Reply-To:     Evan Mac Donald <macdonald1987@SBCGLOBAL.NET>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Evan Mac Donald <macdonald1987@SBCGLOBAL.NET>
Subject:      Re: Ping/Knock/Detonation
In-Reply-To:  <000001c73d75$f1bcaad0$6400a8c0@MASTERPC>
Content-Type: text/plain; charset=iso-8859-1

So, is there somewhere that has replacements for the weak springs? Not a full rebuild - those often aren't - but just the springs?

Dennis Haynes <dhaynes@OPTONLINE.NET> wrote:    <snip>
   On the 1.9 distributors I have seen the diaphragms go bad and weak centrifugal advance springs. Bad springs can make real havoc with the idle settings as anything above 900 rpm will cause the timing to advance, further increasing the idle speed, then at 1300 rpm the fuel cut out occurs, speeds falls, fuel turns back on but O2 sensor is ignored for 30 crank revolutions, so rich mixture, idle speed creep up,
ignition advances again, more idle speed, 1,300 cut off. Yes, this is the
famous 1.9 idle surge. It can also add to engine ping as the advance is not
where it should be.

Dennis
 <snip>



Evan Mac Donald

(present)
1984 Wolfburg (Wolfie)
1985 GL 7 Pass. (Butternut)
1991 Carat Weekender (the Fridge)
1972 Chevy P/U (Sarah Beth II)
1993 Bonneville (the Ghost)
1994 Subaru Legacy wagon (the hearse)
(past)
1976 type 2 (Marigold)
1970 type 2 (the blue bomb)
1968 Chevy P/U (Sarah Beth)
1977 Honda wagon (the Italian special)
1978 Honda wagon (the FIRST)
1978 Honda wagon (the SECOND)
1977 Honda Civic (the roller skate)
1976 type 1 (the bug)