TheSamba.com :: View topic - Girlfriend's 71 SB runs fine cold, but messes up when warm.

Thu Nov 05, 2009 3:00 pm

As the title indicates, my girlfriend has a 71 Super Beetle that runs fine when it's first started but after it warms up, it begins to hesitate. Once it gets to around 30-40 MPH, it just gets pissed off and doesn't want to run right. It's a 1600 DP, stock vacuum dizzy, H30/31 PICT carb. It originally had a draft tube venting the case but I got rid of it and ran a hose from the breather to the air filter. I originally got rid of the draft tube because it was cloged with milky white stuff and stopped venting and oil started coming out from around the pulley. I am now finding the milky white stuff around the inside of the hose and oil filler neck.

any help is appreciated

Joe

Thu Nov 05, 2009 3:05 pm

Thats the exact opposite of my girlfriend....she hesitates when cold but is great once I get her warmed up :)

Thu Nov 05, 2009 3:05 pm

It would be nice if you could find the correct 34PICT3 carb for it and check the heat risers to see if they do indeed heat up the carb.

Choke set correctly?

Thu Nov 05, 2009 3:09 pm

not quite sure what heat risers are. would i be an asshole to ask for a picture of it? also, not sure what to do with the choke :oops:

Thu Nov 05, 2009 3:16 pm

Here is a handy link you should read through.....

http://www.thesamba.com/vw/forum/viewtopic.php?t=56411

It is the small pipes on the intake manifold that attach to the exhaust system to provide heat to the carb....(this one is a little differnt as it is a single port intake)....

When they are clogged up, the little pipes will not be too hot to touch after you drive it about 10 minutes. If conditions are right, you will actually get ice to form at the bottom of the carb during high humidity driving.

Here is how you clean them (if yours are plugged up with carbon)

http://www.vw-resource.com/heat_risers.html

Thu Nov 05, 2009 3:17 pm

Agree on the choke setting.

Could also be a vacuum leak. When cold the closed choke cuts off air, compensating for a vac leak. When choke opens, too much air.

Use spray to check for leaks in carb seams etc. Pull hose from vac can and suck on it observing the dizzy plates for movement. Hold the vacuum with your tongue on the hose and see if it holds indefinitely. A leak in the dizzy vac can will affect timing and cause an over lean condition.

The milky stuff is condensed moisture. Do you not get out on the highway for a good run regularly? It gets rid of that. There should be a breather hose to the air cleaner and there should also be a drip tube going down through the tin and ending in a "duckbill" rubber grommet.

Here is a pic of a stock '71 Super with everything intact except one vac hose missing from the altitude corrector to intake manifold.

[img][/img]

jim

Sun Nov 08, 2009 8:17 pm

well i was able to borrow some time at the tire shop so i could drill out the heat risers and now the car drives different but i wouldn't say better. i think i may need to get to plugs and wires now.