ljohn

It's me again....My73SB starts up great sometimes it will kick in high idle to warm up other times not, If car is not warmed up when I stop at a stop sign (little ways from home) it will stall but once its warmed up it idles fine....Thinking choke needs adjustment..........What’s the easiest way to achieve this...?

LJohn
Quote 0 0
MLTigger

I have the same problem on my '74  How do you adjust or check to see if the choke is bad?

Quote 0 0
68autobug

Hi

the auto choke is easily adjusted, and when My VWs had them,

I used to find that they needed adjusting a few times a year.

Your engine doesn't need to rev its head off when started,

but if the choke is adjusted in the summer, and works fine, first really cold day, and it can rev its head off...

 

I'll show You a pic of the auto choke - it has 3 marks on the rim..

You just loosen the three screws holding the heating element,

and just turn the round element anti-clockwise [counterclockwise]

slightly... to turn the choke ON

 its best to have the air cleaner off to do this, as You can look down the throat of the carby and see the butterfly valve closing over..

I just looked at 3 Solex carburetors I have and they are all lined up on the middle mark on the rim, but the butterfly flaps are all at diferent angles... so every choke will be different, and they do change with hot/cold weather...

You will have to start the engine and adjust the choke ASAP as it starts to warm up as soon as the key is turned on.

You will soon find it easy to adjust the auto choke, and keep Your engine starting and running OK when cold... but Not revving too much

when cold...

 

VWs idea with the auto choke - was to get the engine started easily, and then You drove off and the carby worked normally ...

as VW engines do warm up very quickly..

 

Lee Noonan  -- 68AutoBug -- Australia --

 

 

http://community.webshots.com/user/vw68autobug

 

68AutoBug - helping keep air cooled Volkswagens alive in Australia & around the World -

http://community.webshots.com/user/vw68autobug
-
Quote 0 0
68autobug

Sorry folks about the pics...

My flatbed scanner has decided not to work..

and these were the only ones I had of the autochoke.

and the 2nd one sort of disappears when made larger??

 

Using the first pic of the auto choke, there are 3 marks on the carby side , and one on the choke side, so You can move the auto choke element back and forth as needed..

Once You find how much the butterfly flap has to be closed , to start the engine, You can adjust the choke whenever its needed.

 

One thing to remember -

You need to push the accelerator pedal down slightly once to get the automatic choke to work ..

as the stepped piece on the Left Hand side of the carby needs to work

ie.. When you push down once on the pedal, the stepped piece can be selected and the adjustable screw that sits on the stepped bit, can also be adjusted to change the revs of the engine...

 

The electric auto choke is a very basic invention..

there is an electric coil inside the choke, where the wire hooks too.

once the ignition is switched on the element warms up and the choke slowly turns off...   so, if You switch the ignition on, for a few minutes on a cold day, chances are the engine won't have enough choke to start....

 

On water cooled engines, with coolant warmed chokes, the choke doesn't go off until the coolant gets to a certain temperature...

 

I hope these pics come out better....

 

cheers

 

Lee Noonan -- 68AutoBug -- Australia --

 

http://community.webshots.com/user/vw68autobug

 

68AutoBug - helping keep air cooled Volkswagens alive in Australia & around the World -

http://community.webshots.com/user/vw68autobug
-
Quote 0 0
68autobug

 

Well, its happened again folks...

the pics are playing up...

even disappearing...

but if You let them settle down, and go back to the small

nearly invisible size, You can click on them and make them larger

I hope....

I don't think it was a good move to try to make the pics larger

by increasing the pixel size....

I probably did a lot of things I'm not supposed to do, on the computer..

I'm really not computer friendly...

maybe one day....

 

 

Lee  --  68AutoBug  --  Australia --

 

 

68AutoBug - helping keep air cooled Volkswagens alive in Australia & around the World -

http://community.webshots.com/user/vw68autobug
-
Quote 0 0
MLTigger

Thanks for the info, and the attempt at pictures.  I think I get the idea.  I can move that little stepped piece and the engine idles fine so, I just need to make a couple of adjustments.

I'm going to be doing a full tuneup pretty soon

Valve adjustment, points, condenser,cap, rotor,plugs, wires and a new air filter and oil change and I should be good to go.

I am having my mechanic adjust the valves this time. He will do it for $35.00 which sounds reasonable to me. 

is .006 what they should be set at?

Quote 0 0
68autobug

You are right with the tappet clearances .006"

although one of the locals here always does his at .008"

He has owned VWs for about 40 years..

and He replaces the engine every few years with a new one.

His beetle is always running perfect, and its hard to tell if the engine is idleing its so quiet....

He does most of the work on His cars himself...

Doing the tappets is one job I've never actually done entirely by Myself, I can adjust the tappets OK, but I'm never quite sure about

what cylinder to do...  as its something that can destroy an engine, I'd rather let someone who knows what they are doing, adjust them.

I would like to see "the local" mentioned above do His tappets, and take notes....  

 I've read lots of manuals telling of different ways to have the cylinder to adjust, in the right position...

 

Maybe one day......

 

Lee .. 68AutoBug .. Australia ..

 

 

http://community.webshots.com/user/vw68autobug

 

68AutoBug - helping keep air cooled Volkswagens alive in Australia & around the World -

http://community.webshots.com/user/vw68autobug
-
Quote 0 0
ljohn

Thanks for the help....

 

For a 74SB .006 is the correct clearance and and is to be adjusted cold.

 

On my choke there is no visable markings that I can see, element housing is marked with a "60"

 

I did adjust cold then went for a ride to warm up then readjusted choke it was close to my initial alignment with the element aligning close to the middle mark. Not sure when it gets cold but in VT that won't be to long. Thinking I need a minor tune up need to get a timing light and a hand held tachometer ......

 

 

LJohn
Quote 0 0
68autobug

 

The main problem with someone else doing Your tappets MLtigger

is the engine has to be completly cold...

like after standing all night....

so it can be a problem taking it to a mechanic, although I suppose the engine will cool down in a few hours....

 

LJohn 

If You have a 009 distributor you need to time it at approx 32 degrees

with the engine at Full advance....

Once You have a timing light, You can adjust or check the timing when ever you want to...

I use mine every month or so....

I'm not doing many miles so nothing has really worn...

 

I can't believe My Son was driving a 69 beetle with a 009 {my spare]

dizzy etc and never had a timing light on the engine...

for over a year...

after He had used My timing light, the car is going much better and isn't using as much fuel -- as it was a guzzler before.... 

 

Lee -- 68Autobug -- Australia --

 

 

http://community.webshots.com/user/vw68autobug

 

68AutoBug - helping keep air cooled Volkswagens alive in Australia & around the World -

http://community.webshots.com/user/vw68autobug
-
Quote 0 0
MLTigger
68autobug wrote:

 

The main problem with someone else doing Your tappets MLtigger

is the engine has to be completly cold...

like after standing all night....

so it can be a problem taking it to a mechanic, although I suppose the engine will cool down in a few hours....

 

 

That isn't a problem as I usually leave the car plus the shop is one mile from my house.  It is a small shop and I will ask him to adjust it cold and also to tell me if any were loose or tight.  This shop is not a VW shop but he has worked on VW's before.  So at least he knows the engine is in the rear LMAO

Quote 0 0