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I sorted mine with a tweak on the pressure sensor, but you really need a gas analyser to check the CO level is still OK. Some control units have an enrichment screw on top to save removing the pressure sensor seal (illegal in some states?). Make sure there are no vacuum leaks; the changing pressure in the manifold can cause it too. Is the distributor shaft OK - not too worn? Dave. UK VW Type 3&4 Club www.hallvw.clara.net/ -----Original Message----- From: barry ward <barry.ward@tip.csiro.au> To: type3@vwtype3.org <type3@vwtype3.org> Date: 15 September 1998 01:58 Subject: [T3] hunting at idle >I have a 72 fastback auto (FI) that tends to hunt at idle (with the >advance and retard hoses off the distributor and blocked). This >makes it difficult to set the timing- any ideas on this problem. >I have recently added a 'GEX' GT style extractor (the one with the >four chrome tips) does this affect the idling and/or timing. > Rgds Barry Ward > > >------------------------------------------------------------------- >Search old messages on the Web! Visit http://www.vwtype3.org/list/ >