SD_GOON Posted August 9, 2012 Report Share Posted August 9, 2012 Today I rebuilt a 32/36 weber carb and put it on my wagon. For some reason it just revs really high no matter what I do. I was wondering if any of you guys can give me a hand This is the kit I used: http://www.ebay.com/...9#ht_1265wt_250 Here is a small video of what I'm talking about http://www.youtube.com/watch?v=GjfPVW9Y8q8&feature=youtu.be Quote Link to comment
Dawa Posted August 9, 2012 Report Share Posted August 9, 2012 damn that is high. and those butterflies are staying wide open, i wonder why. Quote Link to comment
datzenmike Posted August 9, 2012 Report Share Posted August 9, 2012 Linkage too tight not allowing it back to idle? Secondary stuck or jammed open? Foreign object? Fast idle cam stuck? Did you remove the throttle plates? They shouldn't be removed because they are very difficult to get back in proper alignment and don't close properly. Quote Link to comment
SD_GOON Posted August 9, 2012 Author Report Share Posted August 9, 2012 Linkage too tight not allowing it back to idle? Secondary stuck or jammed open? Foreign object? Fast idle cam stuck? Did you remove the throttle plates? They shouldn't be removed because they are very difficult to get back in proper alignment and don't close properly. I didn't mess with anything other than the parts that came in the rebuild kit. I'm gonna check all the stuff you just said tomorrow afternoon and see if I can find the problem. Thanks Quote Link to comment
ggzilla Posted August 9, 2012 Report Share Posted August 9, 2012 Another common problem with Weber is if you tighten the linkage quadrant on the throttle shaft. Quote Link to comment
420n620 Posted August 9, 2012 Report Share Posted August 9, 2012 can't tell from the video to well but down at the bottom of the adapter plate where it sits on the intake manifold, is that a thin opening to the intake manifold. Squirt some WD40 or starting fluid and see what that does. If that doesn't change the RPM then try around the other sides. Quote Link to comment
banzai510(hainz) Posted August 9, 2012 Report Share Posted August 9, 2012 remove the rear linkage assembly as GGZilla mention. esp the rear 12mm nut loosen it. 2nd barrel the spring will fall off thus opening the 2nd barrel with a tiny amount of vaccum. make sure this is closed with the spring. It pulls up to close the 2nd barrel plate. Quote Link to comment
SD_GOON Posted August 9, 2012 Author Report Share Posted August 9, 2012 I appreciate the help guys. Can't wait to get home and figure this out. Quote Link to comment
SD_GOON Posted August 9, 2012 Author Report Share Posted August 9, 2012 Good news guys, turns out it was the throttle linkage that was making it rev so high. I shortened it a bit and it is now idling between 900-1200 rpm witch is good right? Anyway, now I have another problem that sounds for more serious than before. The weber is making a really high pitched noise and I have no idea what the hell that is. Any clues? Here's another video Quote Link to comment
datsunaholic Posted August 10, 2012 Report Share Posted August 10, 2012 High pitch noise is usually a vacuum leak. So now you have to find it. Quote Link to comment
SD_GOON Posted August 10, 2012 Author Report Share Posted August 10, 2012 Ok thanks man. I kinda freaked out lol. Quote Link to comment
ggzilla Posted August 10, 2012 Report Share Posted August 10, 2012 900-1200 is not a good idle. 650-850 is good idle. Quote Link to comment
brodster Posted August 10, 2012 Report Share Posted August 10, 2012 Another common problem with Weber is if you tighten the linkage quadrant on the throttle shaft. What is the linkage quadrant? Not to hi-jack this thread, but I can't get our brand new weber to completely relax out to the idle adjustment screw stop. It is on our 521 so it is cable not linkage. It is like it sticks sometimes about 1/16" before it stops. You have to pop the throttle quick before it settles. Quote Link to comment
ggzilla Posted August 10, 2012 Report Share Posted August 10, 2012 The screw on the end of the throttle shaft, that holds the linkage on, the linkage piece is the quadrant. Don't get that screw tight, just enough so it's not loose, otherwise the throttle binds a little. Quote Link to comment
banzai510(hainz) Posted August 10, 2012 Report Share Posted August 10, 2012 Bodster 521s you should have a helper return spring also that was on the stock Hitachi. On 521s you might have to add another return spring besides the the one inside the carb itself. It not a strong spring . On my 521 I route it to the valve cover bolt. but its a soft spring not one that will wear the carb out over tightening the butterfly. Quote Link to comment
brodster Posted August 10, 2012 Report Share Posted August 10, 2012 The screw on the end of the throttle shaft, that holds the linkage on, the linkage piece is the quadrant. Don't get that screw tight, just enough so it's not loose, otherwise the throttle binds a little. Sorry what screw are you talking about? I loosened pc. 65 a bit on the following drawing (the throttle shaft nut). It helped a bit. http://www.carburetion.com/diags/3236DGVDiaginfo.asp Bodster 521s you should have a helper return spring also that was on the stock Hitachi. On 521s you might have to add another return spring besides the the one inside the carb itself. It not a strong spring . On my 521 I route it to the valve cover bolt. but its a soft spring not one that will wear the carb out over tightening the butterfly. This is a good idea. I may give this a try. Thanks Quote Link to comment
ggzilla Posted August 10, 2012 Report Share Posted August 10, 2012 Yep, throttle shaft nut. Quote Link to comment
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.