Sorry it took so long for me to get back to you, been cruising to Bermuda. A worn carb throttle shaft is discovered by rotating the butterfly to the open position, then wiggling up/down or froe/aft for excessive play. Side-to-side isn't so critical, some play here is necessary to prevent binding or jamming. I do recommend using a rebuild kit for you carb, they're cheap.
I use Berryman B9 Chem-Dip in the 3/4 gallon can. Not very expensive, but very potent, so be careful using it. Wear gloves. It comes with a handy dipping basket inside. Don't know what to do when disposing of the used chemical, tho. I still have my original can, usable over and over again. http://www.amazon.com/Berryman-Parts-Cleaner-Basket-gallon/dp/B0002KKIIC/ref=sr_1_1/104-8316276-1009513?ie=UTF8&s=automotive&qid=1180875913&sr=1-1 This company also makes a good carb cleaning spray too. http://www.amazon.com/Berryman-Chemtool-Carburetor-Cleaner-aerosol/dp/B0002KKIDW/ref=sr_1_4/104-8316276-1009513?ie=UTF8&s=automotive&qid=1180875913&sr=1-4 HTH, Mike B. ----- Original Message ----- From: "Nicholas Stokes" <[EMAIL PROTECTED]> To: "Mike" <[EMAIL PROTECTED]> Sent: Tuesday, May 29, 2007 8:48 PM Subject: Re: [vintagvw] Is There a Quality Carburetor Out There? > Mike, > Thanks again for all your great advice on carbs. > > I went to the BugOut show in Manassas VA this weekend and talked to a > vendor who sold quality German-made parts as well as some Brazilian and > Mexican. I asked about the Pierburg carbs and he was pretty sure they > were made in China and he only sold the Bocar ones ($189!) and has had no > problems with them. The EMPI ones sold at other stands were stamped > "Made in China". > > This led me to look through my parts bin to find a Solex that I had taken > off of the Bug to replace with the Pierburg. I can sense no slop in the > throttle shaft and I replaced it only because it had set for a number of > years and I was sure it was all gummed up. Should I be able to feel the > wear in the throttle shaft? > > Do you have a recommended cleaning solution (brand/type) that I can use > to get this one ready? Should I also put in a rebuild kit as long as I'm > going through it? I'd like to take my chances with it rather than risk > getting another poor quality replacement. > > Thanks again. > > Nick > On 24 May, 2007, at 18:41, Mike wrote: > >> Nick, >> >> The 34 PICT-3 carb should have the throttle completely closed at warm >> idle. The automatic choke cam should be fully rotated down when fully >> warmed up. That means that the throttle lever's adjustment screw should >> have a tiny bit of clearance between it's tip and the choke cam's >> smallest step. This is proof that the throttle plate is fully closed >> inside the carb barrel. This brass plate has a small hole in it to >> meter basic idle airflow when the plate is fiully closed. The fine >> idle air adjustment is then controlled by the volume screw. If that's >> fully closed by turning it all the way in, the engine should die, due to >> being almost completely deprived of idle airflow. >> It sounds like you're engine is revved up too high at idle, due to the >> throttle lever screw being adjusted too far in, which is holding the >> throttle plate partially open. This causes the large volume screw to be >> almost completely ineffective, as it's being bypassed. The auto choke >> not fully opening proiperly, due to misadjustment, bent linkage or a bad >> electric choke heating element or bi-metallic spring.. The choke can >> may not be opening to the smallest step, artificially holding the >> throttle plate from fully closing upon complete warmup. This would >> cause the same problem and waste fuel, too. I've found many carbs >> (even new out-of-the- box!) misadjusted this way, due to some previous >> person fiddling with the screws and not knowing exactly what needs to be >> done to make it work properly. >> I've rebuilt dozens of all types of carbs, re-bushed worn throttle >> shafts, and test run them to check for proper operation, leaks and to >> adjust the basic settings, so that a customer could theoretically just >> bolt it on and run it as-is. AFAIK, the Pierberg should be a quality >> item, the Brosols being a pretty decent carb, too. >> You shouldn't try a Holley Bugspray, they stopped being popular many >> years ago for a reason. They just aren't a good carb for this >> application. Yes, they work on a bug engine, but not properly, according >> to what I've read about them. >> HTH, >> Mike B. >> >> ----- Original Message ----- From: "Nicholas Stokes" <[EMAIL PROTECTED]> >> To: "Air-Cooled Volkswagen Discussion List" <[email protected]> >> Sent: Thursday, May 24, 2007 5:45 PM >> Subject: Re: [vintagvw] Is There a Quality Carburetor Out There? >> >> >>> as a followup to my carb problem... >>> >>> My daughter brought the car to me saying that it would not idle. I >>> confirmed this and quickly adjusted the volume screw to let her get >>> home and made plans to work on it in a couple of days. >>> >>> After setting the valves and timing I was unable to bring the idle >>> down to about 900 rpm even with the volume screw all the way in. >>> This caused me to spray some carb cleaner near the throttle shaft to >>> confirm the vacuum leak. >>> >>> The biggest issue is that this Pierburg is advertised to be "German >>> Technology" and no where on the carb or packaging does it state where >>> it is manufactured. This in itself says a lot. It has only been in >>> use for about a year now and I have replaced the float and now the >>> wear on the shaft. If these are supposed to be better than the >>> Brazilian/Mexican made Brosol, it was not proven by me. >>> >>> I'm headed to Bug Out in Manassas VA this weekend. Anyone have a >>> recommendation for a decent replacement? >>> >>> This is a daily driver with a stock 1600 and SVDA dizzy. Is there an >>> advantage to finding a Holley Bug Spray? The Webers are too pricey >>> for me. Any other carbs? >>> >>> I see AirCooled.net has a complete dual setup using Solex carbs but >>> I've always been hesitant to add the complication of two carbs. >>> Anyone have experience with these? >>> >>> Thanks, >>> >>> Nick >>> On 3 May, 2007, at 20:58, Nicholas Stokes wrote: >>> >>>> Is there a decent 34 PICT-3 carb available out there? >>>> >>>> I purchased a new Pierburg hoping that it along with my SVDA >>>> distributor with a CompuFire ignition would keep my daughter's '74 >>>> Standard happy for quite some time. >>>> >>>> Well... the distributor from AirCooled.net works great and gives the >>>> smooth acceleration and performance I had hoped for but the carb has >>>> not lived up to expectations. The first problem at about six months >>>> was flooding out which was diagnosed to be a split float full of fuel >>>> which I replaced with one out of a 30-year old one in the parts bin. >>>> Now, a few months later, there are signs that it is leaking around >>>> the shaft. >>>> >>>> Any recommendations out there? I'm not looking for any extra >>>> performance, just something reliable. All though an extra boost >>>> would be acceptable as long as it works properly with the SVDA dizzy. >>>> >>>> Thanks, >>>> >>>> Nick >>>> VintagVW > http://homepage.mac.com/stokester/VintageVW/ >>>> Dub~Tunes > http://homepage.mac.com/stokester/dub_tunes >>>> >>>> >>>> >>>> _______________________________________________ >>>> vintagvw site list >>>> [email protected] >>>> http://lists.sjsu.edu/mailman/listinfo/vintagvw >>> >>> _______________________________________________ >>> vintagvw site list >>> [email protected] >>> http://lists.sjsu.edu/mailman/listinfo/vintagvw >> >> > > _______________________________________________ vintagvw site list [email protected] http://lists.sjsu.edu/mailman/listinfo/vintagvw
