Rochester Quadrajet Accelerator Pump Test

[@theguy9234]

Do you think a Chinese quadrajet would be ok. If internal parts are replaced with quality parts?

[@MikesCarburetor]

Hard to say. You would have to try it. Who knows what they did to the size of the passages and jets.

[@Normaister1]

Hi, I love your videos, it has helped me alot when I disassemble and assemble the quadrajet to troubleshoot. So thanks alot for that and for putting it out for free on youtube. My quadrajet is mounted on a volvo penta V8 (GM block) and when I try to accelerate I have no power. It takes a couple of seconds for it to come up to speed. I can see that my accelerator pump is only squirting on the the right sided funnel (on the pumpside) but not in the left. It is very dry in that funnel. Could this be the issue? I guess it is suppoused to come fuel from both sides? Do you know what the issue could be why its only comming out from the left side? Everything else looks nice and tidy. Thank in advance!

[@MikesCarburetor]

That would be the issue. You have a blocked passage.

[@jeffneis553]

Could you help me out. I take my 84 Riviera with the 307 to a motorsports place but I have been having trouble when I start it wants to die(when hot,) and when I accelerate or go around corners and accelerate it wants to backfire or feel like it wants to die and it is very very like bogged down when accelerating from a stop. Could this be a accelerator pump issue? The car has all new parts, plugs cap rotor wires filters fuel pump but still it does this. How long do accelerator pumps last??? Thanks so much.

[@MikesCarburetor]

Based on the symptoms you described, it's possible that the issue could be related to the accelerator pump in the carburetor, especially if all other components have been replaced and the problem persists. The accelerator pump is responsible for providing an extra shot of fuel during acceleration, and if it's not functioning properly, it could lead to hesitation, backfiring, and bogging down during acceleration. However, before concluding that the accelerator pump is the culprit, it's important to consider other potential causes as well. Here are a few additional factors to investigate: Vacuum Leaks: Check for any vacuum leaks in the intake manifold, vacuum hoses, or carburetor gaskets. Vacuum leaks can lead to poor engine performance and hesitation. Ignition Timing: Ensure that the ignition timing is set correctly. Incorrect ignition timing can cause engine stumbling and backfiring. Carburetor Adjustment: Verify that the carburetor is properly adjusted, including the idle mixture and idle speed. Incorrect carburetor adjustments can affect engine performance. Fuel Delivery: Double-check the fuel delivery system, including the fuel lines, fuel filter, and fuel pump. Insufficient fuel delivery can cause engine hesitation and stalling. Exhaust System: Inspect the exhaust system for any restrictions or leaks that could affect engine performance.

[@jamesschrom317]

We can't see what your doing your hand is in the way. No help.