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A retun line is not a bad idea even with a manuel pump....but it is by no means a must. A return line even plumbed back into the main supply line further back in the system will work just fine as well. The pump will pump fuel no matter where it comes from.
A return line does help recirc. fuel and allows it to cool some as it goes back to the rear of the car, thus avoiding vapor lock.
Your problem could be as simple as a bad pump or a leaky diaphram on the acc. pump.
Thank you Red......for once I was faster...lol.
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" If it wont break em loose in 3rd gear, it aint enough power "
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