Used in older cars, the carburetor is basically the predecessor of the electronic fuel injection system. In order for it to properly start your car, control idle and emissions, it relies on a variety of add-on components. A clean and well-maintained carburetor shouldn't pose any starting or emissions problem. However, once this part shows signs of old age, prepare to encounter a variety of confusing car problems. This is because the signs of a busted carburetor can also be signs of other engine or ignition issues. It's therefore important to rule out other possible issues when suspecting a faulty carburetor. Now depending on the type and severity of the problem, you might need to replace the carb with a new carburetor kit. But figuring out whether or not you need a replacement carb kit is tricky.
Signs to watch out for
Read on below to determine if it's time to replace your existing carburetor.
A stumbling or hesitating engine when speeding up
If your car engine hesitates during acceleration, it's a classic sign of a lean air-and-fuel ratio. This is usually caused by a poorly adjusted or dirty carburetor, or a carb with internal problems such as worn-out throttle shafts or a weakened accelerator pump. If you've ruled out other possible issues, and you've determined that the culprit is a carb with internal problems, you'll have to invest in a replacement carburetor kit.
Stalling can be caused by a number of problems, including an internal air leak within the carburetor, dirty passageways inside the carburetor, a warped carburetor housing, or severely worn-out carburetor throttle shafts. If any of these problems are the culprits behind your stalling engine, you'll need to replace the whole assembly with a carburetor kit.
This problem can be caused by variety of issues such as air leaks from faulty vacuum lines or a busted EGR valve, air leaks due to a loose carburetor base or worn-out carb gasket, or a contaminated idle mixture circuit. If the culprit is determined to be a dirty mixture circuit, you'll have to rebuild the carb with a rebuilding kit. However, rebuilding isn't advisable if you're dealing with a complicated carb assembly such as those with electronic feedback controls and tamper-proof adjustments. In this case, installing a replacement carburetor kit is less risky than trying to rebuild the carburetor.
Other tips you should keep in mind
Any other car problem that is caused by a carburetor with leaking throttle shafts or damaged castings will require a replacement carburetor kit. Replacing an entire carburetor assembly can get expensive, but in some cases, it's the most practical option. This is especially true if you don't have the right repair skills or enough experience to rebuild the carburetor, or if you're dealing with a complicated carb assembly. If you're not sure as to whether your carburetor needs to be rebuilt or replaced, it's best to consult a mechanic. Both tasks.rebuilding and replacing.can cause more serious problems when done for the wrong reasons.