Re: 54 Packard Clipper

Posted by HH56 On 2015/9/23 8:48:36

I'm at a loss on the pump issue. If you have suction at one of the bottom side ports does it stay when you stop cranking and only release when you remove your finger. Does the corresponding outlet port have pressure and push your finger away. If it does there should be no reason fuel is not pulled in. If either suction or pressure goes away as soon as cranking stops then possibly a valve is stuck or there is another defect in the pump.

You said you replaced the lines. Did that include the small rubber flex hose at the pump. Those are known for intermittent issues as they age. You said there was plenty of gas. There is a place on the input line in the tank that can rust and develop pin holes and admit air instead of fuel. The tank needs to be at least half full to eliminate that as a possibility. The old floating or moving debris in the tank which periodically blocks the input opening has caught many as has not having a vented fuel tank cap.

Your having the issue with just a hose and aux tank makes me suspect something in the new pump may not be in order if that arrangement was connected directly to the input port on the pump and there were no air leaks..