How do I identify my Rochester 2 barrel?
How do I identify my Rochester 2 barrel?
All Rochester carburetors are identified by a seven- or eight-digit part number. The earliest units, made before mid-1968, had a triangular metal tag attached to the fuel bowl. The seven-digit part number is listed on the tag. You occasionally find original carburetors with an anodized tag of various colors.
What does an accelerator pump on a carb do?
An accelerator pump is a component on a carburetor. The accelerator pump is responsible for providing the momentary additional fuel needed under heavy acceleration conditions. When the pedal is suddenly pressed, the throttle will suddenly open, immediately adding additional air for additional power.
How do I know what Rochester carburetor I have?
All Rochester carburetors, including the Quadrajet, are identified by a 7-digit or 8-digit part number; the earliest units, made before mid-1968, had a round metal tag attached to the fuel bowl. The 7-digit part number ran around the outside edge of the tag.
What is the symptoms of bad accelerator pump?
Common Signs And Symptoms That You Need to Replace An Accelerator Pump
- Vehicle fails to accelerate smoothly under tougher driving conditions (weather, turns, etc.)
- Engine stutters when gas pedal is pressed down hard.
- Smoking exhaust is noticed.
How do I know if my accelerator pump is bad?
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.
Why does my carburetor bog down when I accelerate?
The “Bog” simply means the engine is not receiving enough fuel when you go to wide open throttle. While there are other issues that may cause similar reactions within the carburetor, often the problem can be traced back to the accelerator pump system. Incorrect adjustment is the typical culprit.
Where are the numbers on a Rochester carburetor?
ID numbers for a Rochester Quadrajet carburetor are found next to the throttle level. There should be a metal disc affixed to the carburetor for those in the 1965 to 1968 range, and the number was stamped into the unit without a metal disc on the later-year models. This is the number you need for decoding.
