Why does my 1972 VW Bug idle when cold?
If you find it difficult or impossible to make these settings, it is also possible that you have a vacuum leak (i.e., leaking of air into the intake manifold). My 1972 VW Bug will idle when cold, but not when warm. How do I fix this?
What causes weak compression in an air cooled VW?
In most cases weak and/or uneven compression are caused by worn piston rings or bad valve seating. Of course improper valve adjustment could also be the culprit, but I am assuming the valves have already been checked and adjusted at this point (If not then see How To Adjust Air Cooled VW Valves ).
Why does the volume control jet not idle?
The “Volume Control” jet is usually the issue when it does not idle correctly. Make sure it is not more than 2.5-3 turns out, but less is better. If you hear any backfiring, even the slightest, the volume control jet is out too far and dumping too much fuel. Check the “O” ring on both “by-pass” and “Volume Control” jets.
If you find it difficult or impossible to make these settings, it is also possible that you have a vacuum leak (i.e., leaking of air into the intake manifold). My 1972 VW Bug will idle when cold, but not when warm. How do I fix this?
In most cases weak and/or uneven compression are caused by worn piston rings or bad valve seating. Of course improper valve adjustment could also be the culprit, but I am assuming the valves have already been checked and adjusted at this point (If not then see How To Adjust Air Cooled VW Valves ).
The “Volume Control” jet is usually the issue when it does not idle correctly. Make sure it is not more than 2.5-3 turns out, but less is better. If you hear any backfiring, even the slightest, the volume control jet is out too far and dumping too much fuel. Check the “O” ring on both “by-pass” and “Volume Control” jets.
Which is the idle setting on a 34pict / 3?
The Volume Control Screw is the smaller of the two adjusting screws. Screw it in GENTLY until it bottoms. Now unscrew it exactly 2-1/2 turns. This is the starting setting. Start the engine and use the Bypass Screw to set the idle at 850 rpm.
How do you set the idle on a Honda Accord?
Turn the Bypass Screw (the larger one) out a couple of turns, to get things started. The Volume Control Screw is the smaller of the two adjusting screws. Screw it in GENTLY until it bottoms. Now unscrew it exactly 2-1/2 turns. This is the starting setting. Start the engine and use the Bypass Screw to set the idle at 850 rpm.
Is it hard to start a 67 beetle?
Hello, my 67 beetle starts very easily when cold but if i drive it and it warms up, it is then very hard to start. Im about positive its flooded when I shut it down.
Where is the fast idle adjuster on a carburetor?
Locate the throttle arm on the left side of the carburetor. It is controlled by the accelerator cable that runs to the accelerator pedal in the cabin. On the top of the throttle arm, facing to the rear of the car, is a screw called the Fast Idle Adjuster. This works with the choke to give a smooth idle on a cold engine.
How to set idle on 34pict / 3 carburetor?
Start the engine and use the Bypass Screw to set the idle at 850 rpm. 1 Screw it in GENTLY until it bottoms. 2 Now unscrew it exactly 2-1/2 turns. This is the starting setting. 3 Start the engine and use the Bypass Screw to set the idle at 850 rpm.
How does the carburetor work on a cold engine?
This works with the choke to give a smooth idle on a cold engine. As the choke warms in concert with the warming engine, the butterfly valve in the throat of the carburetor opens and the Fast Idle Adjuster moves down the stepped cam, reducing the engine idle speed.