The high idle screw on a Caterpillar 3406B engine is typically located on the fuel injection pump. It can usually be found on the side of the pump, often marked with a label or an identifier. To adjust it, you'll need a screwdriver to turn the screw, which adjusts the engine's maximum idle speed. Always consult the engine's service manual for specific instructions and safety precautions.
There is not a low idle screw. The computer sends a signal to the idle air control motor and it does the adjusting accordingly. If your idle is to high and your check engine light is on then you need to go to a repair shop and have them diagnosis the problem.
To adjust the idle on Mazda 929 from 1992-1995.......on the top side off throttle body there is a idle air screw,turn screw cloclwise to reduce RPM. Question...is idle always high when hot or cold?
Should have a carburetor so all you have to do is turn the idle screw down some on the carb.
You can not adjust the idle screw, it is sealed off at the factory. If you are having a high idle problem check for a vacuum leak or a bad idle air control valve. These will commonly cause a high idle.
Set idle speed to proper r.p.m, by adjusting the IDLE SPEED SCREW. Turn the IDLE MIXTURE SCREW or the AIR SCREW to for correct procedure, achieve highest speed and best response. The IDLE MIXTURE SCREW (FCR) controls fuel delivery to the idle port and the SCREW is located on the engine side of the carburetor slide. Turning the IDLE MIXTURE SCREW out will make idle and off-idle richer. Turning IDLE MIXTURE SCREW (CR, PWK, PJ, PE) controls the amount of air to the IDLE and SLOW CIRCUIT. This SCREW is located on the air cleaner side of the throttle slide and turning the SCREW out will lean the mixture and turning the SCREW in (clockwise) will richen the mixture.
There is no idle adjustment screw as the idle speed is controlled by the computer. Excessivly high idle is most likely caused by and intake manifold leak, or a bad idle air control valve.
Read the owners manual. find the idle adjustment screw and screw that a little. Wd40 all parts. The speed control cable may aso be causing it to never fully get back to the idle position.
Idle is computer controlled, no adjustment screw.Idle is computer controlled, no adjustment screw.
To find the idle adjust on a caterpillar 3406 engine refer to the owners manual. If this doesn't help, contact the manufacturer.
The longer screw is for the idle speed. On the carburetor you will find little letters cast next to each needle adjusting screw. H is for High, and L is for low. http://store.chainsawr.com/
how to turn the idle down. See if it's carburetor or efi. There is a speed adjustment for either using the idle speed screw (carb) or air bypass adjustment screw. If either has no effect, see below-
There is an idle screw on the side of the carb its the one you can turn by hand if you have to use a screw driver its probably not the idle screw. turn it CW to increase and ccw to decrease.