ECM Fuel Pump Control - Chevelle Tech
LSx Engine Discuss the LSx engine & associated components here.

 7Likes
Reply
 
LinkBack Thread Tools Search this Thread Display Modes
post #1 of 23 (permalink) Old Mar 8th, 19, 9:50 AM Thread Starter
Tech Team
Geoff
 
Join Date: Jun 2010
Location: Jax, Fl
Posts: 616
Garage
ECM Fuel Pump Control

Have a GMPP ls3/4L65e in a 67 ElCamino. Fired the beast up last week, all is well.... Here's the question, does the fuel pump run continuously? Using a Tanks Inc setup with their GPA-4 pump module (225 LPH) and the Corvette style filter/regulator (58psi) Pump is powered by ECM.

Any insight/advice is welcome.

Cheers,

Geoff

BTW, pump sure is noisy, a continuous "whine"

Last edited by Geoff1200; Mar 8th, 19 at 9:51 AM. Reason: oops
Geoff1200 is offline  
Sponsored Links
Advertisement
 
post #2 of 23 (permalink) Old Mar 8th, 19, 11:55 AM
Tech Team
Mark
 
Join Date: Mar 2017
Location: Manitowoc Wi.
Posts: 361
Garage
Re: ECM Fuel Pump Control

If the engine is running the fuel pump runs continuously. It also runs for 2 seconds when it primes the system prior to engine start. Do you have any sort of isolation material between your tank and body? If not I suggest adding tank strap insulator strips to help quiet down any whine or noise as almost all electric pumps mounted internally will generate some noise.You need louder exhaust.Ha Ha
modern malibu is offline  
post #3 of 23 (permalink) Old Mar 8th, 19, 12:50 PM Thread Starter
Tech Team
Geoff
 
Join Date: Jun 2010
Location: Jax, Fl
Posts: 616
Garage
Re: ECM Fuel Pump Control

Quote:
Originally Posted by modern malibu View Post
If the engine is running the fuel pump runs continuously. It also runs for 2 seconds when it primes the system prior to engine start. Do you have any sort of isolation material between your tank and body? If not I suggest adding tank strap insulator strips to help quiet down any whine or noise as almost all electric pumps mounted internally will generate some noise.You need louder exhaust.Ha Ha
Good advice, Thanks!
Geoff1200 is offline  
 
post #4 of 23 (permalink) Old Mar 8th, 19, 1:12 PM
Senior Tech Team
Andrew
 
Join Date: Apr 2001
Location: The Druid City
Posts: 2,122
Re: ECM Fuel Pump Control

Geoff,

The Walbro 255 pump is very loud. Last year I replaced it with a DW200 pump. It is the same flow capacity, but much quieter. Here is a video I made to show the results:


It is dramatic!

Andrew
David Bates and 123pugsy like this.


To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

Instagram @projectgattago

"You were the gun, your voice was the trigger, your bravery was the barrel, your eyes were the bullets."
andrewb70 is offline  
post #5 of 23 (permalink) Old Mar 8th, 19, 3:21 PM
Tech Team
Jeff
 
Join Date: Jan 2017
Location: Greensboring, NC
Posts: 991
Re: ECM Fuel Pump Control

I have the same tank setup. As said above the ECM does keep the pump running while the engine is on, key on it primes for 2 seconds, once engine has oil pressure it turns the pump on until you turn the key off.

My first pump was EXTREMELY loud, could hear it over longtubes/turn down exhaust. It started loosing pressure at wot, contacted Tanks Inc, they replaced the pump under warranty. When I pulled the old pump out the anti drain back valve fell out of the feed tube.



Tanks tech support was patient and ran me through a couple of checks beforehand. One thing they said is to make sure the pump isn't making contact with the bottom tank, that would cause noise to be transmitted. The pump is in a sump tank, with sock on bottom, needs to be at least 1/4" off the floor.

Good luck!

*Jeff*

Project Salty - 1964 4 door Malibu, beaten, neglected, red headed foster child
LQ4 / T56 Swap
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
Hotwire is offline  
post #6 of 23 (permalink) Old Mar 8th, 19, 3:43 PM
Tech Team
Jim
 
Join Date: Nov 2016
Location: CT
Posts: 300
Re: ECM Fuel Pump Control

Great video.
V1rotate is online now  
post #7 of 23 (permalink) Old Mar 8th, 19, 6:00 PM
Senior Tech Team
Andrew
 
Join Date: Apr 2001
Location: The Druid City
Posts: 2,122
Re: ECM Fuel Pump Control

Quote:
Originally Posted by V1rotate View Post
Great video.
Thanks!

Andrew


To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

Instagram @projectgattago

"You were the gun, your voice was the trigger, your bravery was the barrel, your eyes were the bullets."
andrewb70 is offline  
post #8 of 23 (permalink) Old Mar 8th, 19, 6:04 PM
Senior Tech Team
Andrew
 
Join Date: Apr 2001
Location: The Druid City
Posts: 2,122
Re: ECM Fuel Pump Control

Quote:
Originally Posted by Hotwire View Post
....key on it primes for 2 seconds, once engine has oil pressure it turns the pump on until you turn the key off.

....
To clarify, the statement above is not correct. The GMPP harness doesn't have a connector on it for oil pressure. Thus, the ECU does not monitor oil pressure.

When the key is turned to RUN, the fuel pump primes for 5 seconds (maybe 4). If there is no crank signal present, the pump will shut off. Once there is a signal from the crank sensor (RPM) the fuel pump is turned on and will continue to stay on as long as the RPM signal is present.

Andrew
123pugsy and paul bell like this.


To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

Instagram @projectgattago

"You were the gun, your voice was the trigger, your bravery was the barrel, your eyes were the bullets."
andrewb70 is offline  
post #9 of 23 (permalink) Old Mar 8th, 19, 6:47 PM Thread Starter
Tech Team
Geoff
 
Join Date: Jun 2010
Location: Jax, Fl
Posts: 616
Garage
Re: ECM Fuel Pump Control

Gentlemen, I am now Enlightened, Thanks!
Geoff1200 is offline  
post #10 of 23 (permalink) Old Mar 8th, 19, 6:47 PM
Senior Tech Team
 
Join Date: Sep 2012
Location: New York City
Posts: 1,867
Re: ECM Fuel Pump Control

Quote:
Originally Posted by Geoff1200 View Post
Pump is powered by ECM.

What ECM or fuel injection system do you have?

LS1tech.com supermoderator.
How may I help you?
1971 Monte Carlo SS454-496ci 600hp
1999 Trans Am-500hp
2003 Iszu Ascender XL Limited V8
paul bell is offline  
post #11 of 23 (permalink) Old Mar 8th, 19, 6:58 PM
Tech Team
autumngold
 
Join Date: Nov 2011
Location: canada
Posts: 818
Re: ECM Fuel Pump Control

Pwm is the best way to go with a pressure sensor.
paul bell likes this.

1970 ls-5 numbers matching
marcrose is offline  
post #12 of 23 (permalink) Old Mar 8th, 19, 7:21 PM
Senior Tech Team
 
Join Date: Sep 2012
Location: New York City
Posts: 1,867
Re: ECM Fuel Pump Control

Vaporworx offers a PWM fuel pump controller that works off fuel pressure. It greatly reduces the current the fuel pump uses, which reduces fuel heating, and ramps it up as the pressure sensor tells it to.

It also converts your fuel system to returnless.

And Carl at Vaporworx is a hellofa nice guy.

https://www.vaporworx.com/
pannetron likes this.

LS1tech.com supermoderator.
How may I help you?
1971 Monte Carlo SS454-496ci 600hp
1999 Trans Am-500hp
2003 Iszu Ascender XL Limited V8
paul bell is offline  
post #13 of 23 (permalink) Old Mar 9th, 19, 8:05 AM
Lifetime Premium Member
Dave
 
Join Date: Mar 1999
Location: Agawam, MA / Sarasota, FL
Posts: 2,652
Re: ECM Fuel Pump Control

Quote:
Originally Posted by paul bell View Post
Vaporworx offers a PWM fuel pump controller that works off fuel pressure. It greatly reduces the current the fuel pump uses, which reduces fuel heating, and ramps it up as the pressure sensor tells it to.

It also converts your fuel system to returnless.

And Carl at Vaporworx is a hellofa nice guy.

https://www.vaporworx.com/
He certainly is!

Dave
USAF Retired (1968-1988)
UTC Aerospace Systems, Space Systems International - Retired (1989-2014)
David Bates is offline  
post #14 of 23 (permalink) Old Mar 11th, 19, 12:18 AM
Tech Team
 
Join Date: Jan 2000
Location: Glendale, CA. USA
Posts: 183
Re: ECM Fuel Pump Control

Quote:
Originally Posted by andrewb70 View Post
To clarify, the statement above is not correct. The GMPP harness doesn't have a connector on it for oil pressure. Thus, the ECU does not monitor oil pressure. Andrew
I didn't dig too far into it, but the LSA E-Rod does have an oil pressure connector, and it does not need to be connected for engine operation. However, perhaps if it was hooked up the pressure could be monitored via the OBDII port.


Like many things fun-car related, PWM returnless fuel systems are not for everyone. For me, it was hard to not use the crazy good engineering that the OE's have in today's fuel module. There is nothing in the aftermarket that is in the same orbit.
pannetron likes this.


To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
CarlC is offline  
post #15 of 23 (permalink) Old Mar 11th, 19, 5:36 AM
Senior Tech Team
 
Join Date: Sep 2012
Location: New York City
Posts: 1,867
Re: ECM Fuel Pump Control

It should be stated that not every electric fuel pump can be powered with PWM power.

LS1tech.com supermoderator.
How may I help you?
1971 Monte Carlo SS454-496ci 600hp
1999 Trans Am-500hp
2003 Iszu Ascender XL Limited V8
paul bell is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Chevelle Tech forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address. Note, you will be sent a confirmation request to this address.

Email Address:
OR

Log-in










Thread Tools Search this Thread
Show Printable Version Show Printable Version
Email this Page Email this Page
Search this Thread:

Advanced Search
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
Fuel pump questions Powellbr Performance 0 Jul 24th, 17 9:28 PM
new mech fuel pump, broken? 1966_L78 Engine 18 Jul 15th, 17 5:56 PM
Fuep Pressure VS Fuel Volume spowers2 Performance 14 Nov 30th, 14 5:09 PM
Ethonal fuel and mech fuel pumps Kevin R Performance 19 May 27th, 13 3:17 PM
Dodge P/U fuel pump failure.. any thoughts? onebad82z Bench Racing 20 Jan 11th, 13 11:27 AM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome