Low fuel pressure (Fixed)
08-11-2015, 05:49 PM
#1
Teching In
Thread Starter
Join Date: Nov 2014
Posts: 29
Likes: 0
Received 0 Likes
on
0 Posts
Low fuel pressure (Fixed) This is my first engine swap. I have a 1966 Chevy C10 with a 5.3 from a 05' Silverado. I have only 36 lbs of fuel at the schrader valve.
I installed a under the bed Boyd welding tank that came with a Aeromotive Stealth 340 Fuel Pump. I ran 10 gauge for the power wire and 10 gauge for the ground wire.
I ran 5/16 fuel line from the tank to a LS1 Fuel Filter/Fuel Regulator from Speedway motors. The return line from the regulator to the tank is also 5/16. The fuel line from the Regulator to the fuel rail is 3/8.
My first mistake I made was I reversed return and feed fuel lines at the regulator. After I figured out I barely had any fuel pressure I switched them around. Now I only have 36 lbs. Is it possible I damaged the regulator?
Any advice you can offer this newbie sure would appreciate it.
I installed a under the bed Boyd welding tank that came with a Aeromotive Stealth 340 Fuel Pump. I ran 10 gauge for the power wire and 10 gauge for the ground wire.
I ran 5/16 fuel line from the tank to a LS1 Fuel Filter/Fuel Regulator from Speedway motors. The return line from the regulator to the tank is also 5/16. The fuel line from the Regulator to the fuel rail is 3/8.
My first mistake I made was I reversed return and feed fuel lines at the regulator. After I figured out I barely had any fuel pressure I switched them around. Now I only have 36 lbs. Is it possible I damaged the regulator?
Any advice you can offer this newbie sure would appreciate it.
Last edited by Mathew21; 08-13-2015 at 05:33 PM.
08-11-2015, 07:13 PM
#3
Teching In
Thread Starter
Join Date: Nov 2014
Posts: 29
Likes: 0
Received 0 Likes
on
0 Posts
08-13-2015, 05:32 PM
#6
Teching In
Thread Starter
Join Date: Nov 2014
Posts: 29
Likes: 0
Received 0 Likes
on
0 Posts
I was using this one http://www.speedwaymotors.com/LS1-Fu...Kit,41791.html. I just removed it and installed a Wix brand one and it fired right up. I might have damaged the speedway one when I crossed the fuel lines. But anyway it was a great feeling when my motor started.
Thanks for help!
Trending Topics
09-07-2015, 01:32 AM
#8
So, I did the same thing putting the wrong fittings on the filter. Running the pump straight off the battery, I have what seems to be a decent amount of pressure. When I run through the harness, the fuel only dribbles out. I'm not sure what 58-60 PSI is supposed to look like coming out of a hose, but I thought it would be more. I guess I'll go pick up a new filter tomorrow and see if this fixes the problem.
09-07-2015, 05:35 AM
#9
9 Second Club
So, I did the same thing putting the wrong fittings on the filter. Running the pump straight off the battery, I have what seems to be a decent amount of pressure. When I run through the harness, the fuel only dribbles out. I'm not sure what 58-60 PSI is supposed to look like coming out of a hose, but I thought it would be more. I guess I'll go pick up a new filter tomorrow and see if this fixes the problem.
09-07-2015, 07:43 AM
#10
Teching In
Thread Starter
Join Date: Nov 2014
Posts: 29
Likes: 0
Received 0 Likes
on
0 Posts
So, I did the same thing putting the wrong fittings on the filter. Running the pump straight off the battery, I have what seems to be a decent amount of pressure. When I run through the harness, the fuel only dribbles out. I'm not sure what 58-60 PSI is supposed to look like coming out of a hose, but I thought it would be more. I guess I'll go pick up a new filter tomorrow and see if this fixes the problem.
Do you have an autozone or o'reilly's near your house? They both will loan a fuel pressure tester.