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On 3 Dec 2002 at 15:08, Wade Shen wrote: > Yes, I did the timing and tests as per Bentley a couple of months ago. > I can't remember what the settings were (5 degrees btdc?), but I used > the numbers in their and remember having to remove the vacuum advance > and retard hoses and reseting the idle speed to do it. The distributor > does have both advance and retard. The important thing to verify here is that your timing advances in a quick step about 10 degrees as soon as you open the throttle. If it doesn't, the vacuum retard is not working/releasing correctly. > >The loping idle usually means that the idle speed is set too high, but > I'm not sure that I'm intrepreting your symptoms correctly. > > Yeah, Greg mentioned this as well. Unfortunately the idle varies quite > a bit even while I'm adjusting it. It currently idles as close to 850 > as I can get it (on average, though it's really more like 850 +/- > 100-150). The last time I did this, I notice that when open the > throttle slightly, the engine speed will drop by as much as 150 rpm > before starting to rise. This lead me to believe that the throttle > position switch was misadjusted, but readjusting this made no difference > (using the "click" plus one tick method, ala Bentley). The "click" plus one tick method is ONLY for the 68-9 TPS. There is NO click with the 70-3 TPSs. You have to use an ohmmeter to set these. See the manual to pick the right 2 pins; you're looking for the idle contacts. > > I could put together a "test package" for you with some used 72 > parts. I'd be willing to buy them back from you if they didn't help. > You would have to pay shipping. > That sounds good. I'm going to check a couple of other things (mainly > opening up the TPS and seeing that the contacts are ok), but if they > don't pan out, I think that may be the best option to try to debug this > problem. Careful with the TPS contacts. There are some fine gold wires in there that can get broken off. - Jim Adney jadney@vwtype3.org Madison, WI 53711-3054 USA ------------------------------------------------ To unsubscribe, E-mail to: <type3-off@vwtype3.org> For more help, see http://vwtype3.org/list/