What does an auxiliary acceleration pump do on a carburetor? My understanding is it provides a boost of fuel on full throttle applications. Anyone know for sure?
Auxiliary acceleration pump
- Thread starter Phares
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Well just a guess but it pumps auxiliary acceleration in 
JK.... its kind of like a cold start injector on a fuel injected truck. When the engine is cold a valve is open that allows vaccum under WOT or near WOT to reach it and it squirts more fuel in. Once a certain temp in the motor has been reached the valve is closed and vacuum cannot reach it.
JK.... its kind of like a cold start injector on a fuel injected truck. When the engine is cold a valve is open that allows vaccum under WOT or near WOT to reach it and it squirts more fuel in. Once a certain temp in the motor has been reached the valve is closed and vacuum cannot reach it.
22R?
Helps the motor run when it's cold.
If torn, the motor will run rough until it warms up.
Helps the motor get more fuel when running at high (cold) idle IIRC.
I don't think it has anything to do with power when warmed up like the regular acceleration diaphragm on a mini or LC carb.
Hope that helps.
Helps the motor run when it's cold.
If torn, the motor will run rough until it warms up.
Helps the motor get more fuel when running at high (cold) idle IIRC.
I don't think it has anything to do with power when warmed up like the regular acceleration diaphragm on a mini or LC carb.
Hope that helps.
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- #5
20R on the pickup.
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Good info. I bet that is why my vacuum line to the AAP was plugged by the PO. Good thing I'm rebuilding it anyway. I love MUD.