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Tweaking on the pressure sensor is the very LAST thing to do!. If you are fortunate to have the proper test gear and knowledge you can get away with it, but most haven't access to such. I ended up replacing mine because the PO couldn't keep his screwdriver off that adjustment, I was getting 5 MPG! My idle was hunting too, I cured it by tracking down all the air leaks and replacing seals and hoses, replacing a sticky auxilary air regulator and proper idle adjustment. If you start messing with the factory adjustment, you'll have dim prospects of getting it back to factory standards without some fairly hefty-priced equipment. On Tue, 15 Sep 1998 23:45:30 +0100, you wrote: >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/ >>