What is the symptoms of bad accelerator pump?
What is the symptoms of bad accelerator pump?
Signs that your accelerator pump may need to be replaced include:
- Car does not accelerate smoothly when gas pedal is pressed hard (note: a bad accelerator pump does not affect slow acceleration, only fast acceleration)
- Engine stalls or stutters during hard acceleration.
- Exhaust smoke.
How does a Rochester carburetor work?
Quadrajet carburetors have mechanical secondary throttle plates operated by a progressive linkage; the primaries open before the secondaries, and use on-demand air valve plates above the secondary throttle plates. The air valves are connected by a cam and linkage to the secondary fuel metering rods.
Why is my carburetor not working on my Rochester car?
Thankfully, the most challenging part of repairing the carburetor is first identifying the likely causes of the problem. If the engine will not start due to a carburetor problem when the engine is cold, the cause is most likely a defective accelerator pump. In fact, this is one of the most common problems with Rochester carburetors.
Who was the manufacturer of the Rochester carburetor?
Rochester carburetors were quite possibly the most widely used carburetor in the twentieth century, with over one million units produced by the Delco Carburetor Company, a division of General Motors.
What happens if you clean your carburetor and it still runs?
After thoroughly cleaning the fuel lines and carburetor of your vehicle you may find that you have cleaned it so well that there is no gas getting to the cylinders to let the car start.
Where is the hole in the carburetor on a Rochester jet?
There is a hole, or slot just above the idle mixture screw hole in the bore. Follow this up to the venturi by blowing through it. Make sure it is clear. This passage gets you additional air/fuel mixture from idle up to the accelerator pump circuit.
Thankfully, the most challenging part of repairing the carburetor is first identifying the likely causes of the problem. If the engine will not start due to a carburetor problem when the engine is cold, the cause is most likely a defective accelerator pump. In fact, this is one of the most common problems with Rochester carburetors.
What should I do if my carburetor won’t start?
Pour a small amount of gasoline directly on the diaphragm if the car won’t start. This serves to pump gas through the carburetor and mixes it with air before entering the cylinder. Now try to start the car.
What should I do if my carburetor is not primed?
Now try to start the car. If the car doesn’t start immediately, continue to add gasoline by eyedropper into the carburetor until the engine turns over. Once the engine starts, the pump in the carburetor will take over and pump the fuel.
Rochester carburetors were quite possibly the most widely used carburetor in the twentieth century, with over one million units produced by the Delco Carburetor Company, a division of General Motors.
