Fuel pump assembly question
Thread Starter
Racer
Joined: Jul 2011
Posts: 387
Likes: 2
From: Austin TX
Fuel pump assembly question
whats the point of this? its like the connecting hose but has this housing on it.. why? and can I replace it with just normal 5/8 fuel line?
Thanks
I can't upload the images lately, have to click the URL.. sorry
https://i.imgur.com/cz2hSEH.jpg
Thanks
I can't upload the images lately, have to click the URL.. sorry
https://i.imgur.com/cz2hSEH.jpg
Instructor
Joined: Feb 2014
Posts: 139
Likes: 0
From: Lakeland FL
It's the pulsator. It's supposed to absorb vibration (keep noise down). You can toss it and replace it with high pressure fuel injection line. 5/8" may be a little big though 
. I think it's 5/16" or 3/8".
. I think it's 5/16" or 3/8".
Le Mans Master
Joined: Jan 2006
Posts: 5,621
Likes: 207
From: Orlando FL
I believe the pulsator is a damper. It absorbs the pressure pulses from the pump so the flow is more smooth or constant. It can be eliminated but GM put it there for a reason. I would imagine the pressure at the injectors are more constant and spray is more uniform and regulated.
Race Director
Joined: Apr 2002
Posts: 10,036
Likes: 346
From: Anaheim CA
The pulsator is meant to stop the fuel lines from vibrating from the fuel pressure pulsations. Many people replace it with a length of SUBMERSIBLE fuel line without any problems. The fuel line must be submersible or it will degrade. This is what you need:
That price is for 1 foot (Yes it's expensive. Yes you need it and not some ordinary fuel line, which is meant to keep the fuel on the INSIDE but is not fuel resistant on the outside.)
That price is for 1 foot (Yes it's expensive. Yes you need it and not some ordinary fuel line, which is meant to keep the fuel on the INSIDE but is not fuel resistant on the outside.)
