I recently installed a fuel inlet line kit on my edelbrock 1406 and a pressure gauge between the filter and the carb. My gauge bounces from 0 to 4 back to 0 constantly and i was wondering if that was normal since i have a mechanical fuel pump as it driven by the cam? I have looked for leaks and have none.

 

Mine does the same but between 3 and 6 psi.

 

Yeah after running longer and installing the air cleaner it runs more in that range. I just wanted to make sure that it bouncing was normal. Thank you!

 

when the carb needle/seat opens you can expect the pressure to drop as the bowl fills.

 

That makes sense. Thank you

 

[QUOTE=Boz2882;6031301. My gauge bounces from 0 to 4 back to 0 constantly and i was wondering if that was normal since i have a mechanical fuel pump as it driven by the cam?.[/QUOTE]

Do you have the stock pump? How many miles does the engine have?
The reasons I ask are: 4 psi is somewhat low and some engine oils won't properly lubricate the fuel pump camshaft lobe. I had one wiped out completely. Nasty business. It stated to show itself much the same way yours is now.

 

It started out going 0-4 but after running longer and putting the air cleaner on it was closer to the 6-8 range. It is a new stock style pump with 2k miles after i rebuilt it.