Packard Forum Index » Post-War (1946-54)

30 psi fuel pressure is nearly 10-times too much and would overwhelm any carbureted car. Sounds like you've found the problem but I'm curious what type of pump delivered that pressure? I'm no big fan of electric pumps, at least in my climate where summer temps rarely exceed 95 (except for the last 3 days!) and pressure regulators and I'm assuming you had an electric pump. However, electric pumps are readily available in 6-volt that deliver the 3-5 psi range directly. But unless you're in a blazing hot climate, the mechanical pump, properly rebuilt, should be all that you need.

The pump was not electric. it was the one that came factory on the car. Right after i got the car the pump was leaking so I rebuilt it and that is why it has too much pressure.

I just cant fathom a stock Packard mechanical fuel pump putting out that kind of pressure! Or any Mechanical fuel pump for that matter unless it was for some kind of racing application.

Sounds absolutely impossible to me, I wonder if the gauge was correct or being read correctly. The reason mechanical pumps don't have pressure regulators is that about 5 psi is maximum by design.

Just a beginner if you have fuel spark the third item is compression. If you have all three it should run. Since the car was the last item worked on my bet is this is where you will find the problem. Good luck

The rebuild kit for the fuel pump was supposed to be a factory replacement not a racing one. So I don't know why it would put out that much pressure either. Im just glad that it does not smoke any more.