Car Engine work - Carburetor Installation how to Help Video
Carburetor is the most important part of a car. You should double check after you install a carburetor before you start an engine. With this video you will learn how take care of your carburetor and what precautions you should take while installing it in your car. Along with this, you will also learn how to tune your car for maximum power and how to adjust the car’s ideal speed.
So, lets get started, following video will guide you through out the entire procedure.
Now that the carburetor completely installed you should do one last round of safety check before you start the engine. Double check all of you throttle cable connections, carburetor fasteners, choke wiring, ignition wires, battery cable, vacuum ports, and vacuum hoses, and all the hose clamps that goes along with the fuel lines. Correct any vacuum ports or hoses that were not connect or plugged. All make sure that all the wire connections are correct and they are no lag wires hanging loose. With the air cleaner install for the smooth throttle action, all the way out and closed with no biding. The result of the throttle sticking open could be devastating to your engine. When those checks have been made, and you verified your ignition timing, start your engine. As soon as it fires, you need to check for fuel leaks. If one is detected shut the engine off until the fuel leak is resolved. Now that everything is installed and checks out safely, you need to do some initial carburetor tuning. In most cases, following will be only the adjustment you need to make this video does have an advanced tuning section. However, you should first make the following adjustments and take the car for a test ride. If further adjustments are required, then go to the more resources section, of this video, and click on the advanced tuning button for more procedures.
Start with the choke adjustments since the engine will be cold first time, when you start it up. There are two adjustments on an electric choke. You can control the choke operation by rotating the choke cap. Have a look at the marks that are on the choke mounting and the thermostatic choke cap. If the choke comes open too soon, loosen the three screws and rotate the cap, counter clock wise, one notch at a time, until the choke operation is satisfactory. Rotate the choke cap clockwise if the choke opens too late. The only other adjustment on the choke, controls the engine idle RPM during cold start up. The adjustment that control the RPM is the fast idle cam. The factory should give you about 1500 to 1600 RPM fast idle speed and in most cases, won’t need an adjustment. If your engine requires higher idle speed, or is not idling about 1600 RPM’s during the initial cold start up, refer to the advance tuning section of the video for the tips on adjustment of fast idle cam screw.
Go back and forth and adjust the choke opening point and fast idle cam as many times as needed, until the engine’s idle is well from the cold start all the way in to pulling warm. Once the engine is fully warmed, the choke will be in the open position, and the throttle will off the fast idle cam. Now you need to adjust the curb idle speed screw. The curb idle screw control the throttle plate position at idle, which in turns lowers or raises the engine RPM.
To properly set the engine idle speed, find the proper idle RPM on the underhood D-caliber vehicle. If this D cals is not available, find the service menu that references your vehicle and find the recommended idle RPM. Make sure that the parking break is on, and the wheels are blocked. Place any automatic transmission in drive, or in a case of manual transmission, have it in a neutral. If the engine’s RPM is slower than recommended, turn the screw clockwise, opening the throttle blades to speed up the RPM. If the engine’s RPM is too fast, turn the idle screw clockwise, closing the throttle blades to slow down the RPM. Next you want to adjust the idle mixture screw, when tuning the idle mixture, you are actually tuning to the best maniple vacuum. Vacuum needles can be found on the sides of the metering box.
Depending on which carburetor model you got, you need to have two or four idle mixture screws, regards this how many idle mixture screws you have, if you change the settings, on one idle mixture screw, you require to change the other idle mixture screws in exact same amount. To properly set the idle mixture, you need a vacuum gaze to attach to full maniple vacuum port. The initial adjustment is made by turning mixture in clockwise direction, until they lightly bottom out. Then back them both of one and half turns. Adjust each idle mixture screws, the same amount to achieve, the highest possible vacuum reading, without having to go back and readjust the idle speed screw. Once you achieve the highest amount of backing to the idle mixture screws, now you can go back and reset the idle speed screw of the engine.
The last adjustment you need to make, is the float ball level adjustment. The fuel balls, will need to be full, and the side plug pull from the side of the your setting. You losing the top screw of the fuel ball and adjust the level by turning the adjusting nut while holding the screw up top place. When fuel level is at the bottom of the side plughole and the trick is just a bit, your float level should be set correctly. Replace the side plug, lightly tighten with the screwdriver, and then flush the fuel ball, by running the engine few times. Shut the engine off and remove the side plug to confirm the level setting. If you don’t see a side drip, or too much fuel spill out, then you need to readjust the level again. If you carburetor doesn’t have an external level float adjustment, then no changing the level is required.
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