Hello. I don't subscribe to the list any more, so pardon the intrusion. I once said to adjust the 2.1 l digifant on my Wolfs, to turn the, about 1/3 inch (about 7 mm) slotted screw near the throttle housing (or in it). Then I said don't turn that screw, I'd learn how to properly adjust the idle. (My idle was too high and was 'bumping' the transmission bad, that's what started the whole thing.) But also, I had found I could eliminate the intermittent power problem with highway touring by opening (counter clockwise) that screw. Well, now I know that screw is the idle adjust. BUT, it seems adjusting the idle isn't for casual mechanics anymore. The EPA or something has made it near impossible. There is another adjustment, the CO adjustment, under a cap that has to be drilled out to get at. The CO adjustment is in the air intake/air flow control unit. Finally, there is a tiny screw on the lever of the throttle that Bentley says NEVER change or adjust. I said I'd learn how to properly adjust all this. I tried to bring my idle down. Next you know, it idles way high still and dies at every stop, requiring starting the engine every stop. Well, this was terrible, ruining my transmission. So, I broke down and took the Wolfs to the dealer. $208 dollars later, it runs ok. In my case, the dealer opened it all up, had to remove carbon deposits from the intake paths. AND, there was a stuck (open or closed?) switch that was totally leaving the HALL unit in the dark. There are about 3 switches controlling the intake, I think, in addition to the at least three screws. The moral: I guess us 'drivers' shouldn't mess with the intake adjustments generally. The adjustments determine the emissions, so are absolutely necessary to pass inspection, and they are complicated. The one biggest, most obvious screw you can turn, clockwise to lower idle, counter to raise idle. If that doesn't solve the problem, take to dealer (I say dealer because they may need some VW equipment most garages don't have.) Regards, Russ '87 Wolfs still going good about 150k miles (2nd engine). |
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