The o ring is only valid if you adjust the two screws out 2 1/2 turns as Sammie said, it works good then a few miles later it is back to not ideling. It is the o rings under the two screws that won't keep the screws adjusted properly and can be bought at any good VW parts supplier. The anti-diesel valve is a small canister with a neck that screws into the left side of the carb. The other end of the canister has a wire that goes to the hot side of the coil.When power is turned off the valve closes and stops the carb from dieseling. On Tue, Sep 27, 2011 at 8:16 PM, Cari Smith <cariandpaul@xxxxxxxxx> wrote: > Guess I just responded to Sammy, but here it is.... > Sammy, The Solex carb has H30-31PICT printed on it and it's a 1969 bus... > any hitnts? > - Show quoted text - > > > Do tell about the oring.... is it attached to the idle screw? Where to find > a replacement? > > Anti-diesel valve> Where is it? The bus does not diesel after we turn the > key off.... does that matter? > > On Tue, Sep 27, 2011 at 5:07 PM, Steve Chamberlain < > steveraychamberlain@xxxxxxxxx> wrote: > >> You never answered Sammies question about year etc. On my stock 34 pic it >> ran on the road great but same symptoms at stops. I would back the >> adjustment screw out 2 1/2 turns, it would run good a little bit then back >> again. I replaced the o ring on the adjustment screw and that settled it. >> Another place to look is at anti-disel valve. If it comes unscrewed it will >> die. >> >> >> >> .On Tue, Sep 27, 2011 at 4:33 PM, <wuzmop@xxxxxxx> wrote: >> >>> Plug wires routed wrong! Points are also VERY important, but have no >>> bearing on the compression, so the comp test wouldn't tell you that. >>> >>> >>> -----Original Message----- >>> From: Biggestdaddyo <biggestdaddyo@xxxxxxxxx> >>> To: tcb <tcb@xxxxxxxxxxxxx> >>> Sent: Tue, Sep 27, 2011 9:01 am >>> Subject: [tcb] Re: t@p pain and jeapordy >>> >>> This seems to have "vacuum leak" written all over it. I would check >>> the nuts/bolts on the entire intake system for tightness. >>> *From:* Cari Smith <cariandpaul@xxxxxxxxx> >>> *To:* tcb@xxxxxxxxxxxxx >>> *Sent:* Monday, September 26, 2011 5:51 PM >>> *Subject:* [tcb] t@p pain and jeapordy >>> >>> The other Paul Smith and I have worked to get the bus back to road >>> worthy shape in time for T@P, but we are getting down to the wie. >>> Here's our problem. We have a fuel/air mix problem that we can't seem to >>> kick. Symptoms are a bus that does not idle correctly and Paul has to >>> 3-foot it at all stops. That's one on the clutch, one on the brake, and one >>> on the gas to keep us from stalling. The first and easiest answer is to >>> adjust the idle. The screw does nothing and based on our Muir book, we >>> cleaned the carb. Now will hold a fairly steady idle , but it's too low. >>> When you engage the transmission it dies. Or when you rev the throttle, on >>> the way back down to idle it goes too low and dies. So far we have: cleaned >>> carb with carb cleaner, cleaned air filter, replaced fuel pump and rod, >>> replace valve cover gasket (unrelated), replaced spark plugs, checked >>> timing, run compression test... all is good. The only thing we havent >>> replaced is points, but I surely would have thought fouled points would >>> show up in the compression test. >>> >>> Any words of wisdom, we're caught between takinging it to a mechanic down >>> the street for God knows how much moolah, or skipping Transporters >>> altogether, which really means we would still come in our pontiac and just >>> camp in a tent. >>> >>> Help! >>> Cari smith >>> >>> >>> >> >