Gas Tank - Pickup Tube - Mustang Evolution

Go Back   Mustang Evolution > 4 Cylinder | V6 | Classic Mustangs || Tech and Talk > Classic Mustangs



Reply
 
Thread Tools Search this Thread
Please support our sponsors and let them know you heard about them here!
Old 05-14-2018, 12:37 PM   #1
Registered Member
Regular
 
Aggiesrok's Avatar
 
Join Date: Jul 2011
Location: Bryan
Region: Texas
Posts: 1,890
Gas Tank - Pickup Tube

The gas tank and sender are about 3 years old. I changed the gauges to Auto Meter Phantom. I've been struggling with the gauge reading and switched between Linear and Non-Linear. But ran out of gas a couple of times and was only able to put in about 12 gallons at the most with gas spilling out the neck.
I've been measuring the ohms on the sender and noting the gas gauge and how much gas it will take. I data fits for a Non-Linear gauge. But I can't seem to be able to use the last of the gas, the gauge will show around 1/4 tank and it'll die until refilling.
Has anyone had a problem with the filler tube being bent? That's the only thing that makes sense. I'm trying to find a solution before draining the tank.
__________________
chevy runs deep, Don't step in chevy!

67 Coupe 289 - TCI C4 w/2k stall; Holley 4150 570cfm; Performer intake; mild cam; Pertronix HEI; 302 heads; Roller Tips; Hedman Tri-Y headers; H-pipe w/Flowmaster 40's; 9 in posi 3.50; 205/50-17F; 225/50-17R.
Aggiesrok is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 05-17-2018, 10:38 AM   #2
Registered Member
Regular
 
Join Date: Mar 2013
Location: Salinas
Region: California
Posts: 8,140
I've never personally heard of the pick-up tube being bent somehow inside of the tank. Anything is possible in 50+ years though.
I have heard of the pick-up tube being damaged by rust and other problems, mostly associated with age. The only way to find out for sure is to crack it open and have a look.
One way that you can diagnose it without going into the tank, is to disconnect the fuel line from the suction side of the fuel pump, after the engine has run out of fuel, and see if you can siphon the remaining fuel that is inside of the tank. If you can get fuel to flow from the line, then the problem is likely the fuel pump not being able to pull the fuel from the tank once it drops to a certain level.
straybullitt is offline   Reply With Quote
Old 05-17-2018, 12:27 PM   #3
Registered Member
Regular
 
Aggiesrok's Avatar
 
Join Date: Jul 2011
Location: Bryan
Region: Texas
Posts: 1,890
That's a good alternative to dropping the tank initially. The only other thing I can think of is if it's forming a vacuum since there is no venting.
__________________
chevy runs deep, Don't step in chevy!

67 Coupe 289 - TCI C4 w/2k stall; Holley 4150 570cfm; Performer intake; mild cam; Pertronix HEI; 302 heads; Roller Tips; Hedman Tri-Y headers; H-pipe w/Flowmaster 40's; 9 in posi 3.50; 205/50-17F; 225/50-17R.
Aggiesrok is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 05-17-2018, 07:48 PM   #4
Registered Member
Regular
 
Join Date: Mar 2013
Location: Salinas
Region: California
Posts: 8,140
The fuel tank must be vented somehow. If the tank itself is not vented, then the fuel cap must be vented.
I can't remember what kind of fuel pump that you have... Is it mechanical or electric?
If it is electric, is it mounted somewhere near the fuel tank?
straybullitt is offline   Reply With Quote
Old 05-18-2018, 02:06 PM   #5
Registered User
Newbie
 
Join Date: Nov 2014
Location: belgique
Region: Europe
Posts: 1
It is the cap of the tank that makes the area.
marc_spierk is offline   Reply With Quote
Old 05-27-2018, 02:42 PM   #6
Registered Member
Regular
 
Aggiesrok's Avatar
 
Join Date: Jul 2011
Location: Bryan
Region: Texas
Posts: 1,890
It's a mechanical fuel pump. It' a factory replacement style gas cap, not a 3rd party cap. So I'm sure about it being vented, it doesn't look like it is.
__________________
chevy runs deep, Don't step in chevy!

67 Coupe 289 - TCI C4 w/2k stall; Holley 4150 570cfm; Performer intake; mild cam; Pertronix HEI; 302 heads; Roller Tips; Hedman Tri-Y headers; H-pipe w/Flowmaster 40's; 9 in posi 3.50; 205/50-17F; 225/50-17R.
Aggiesrok is offline   Reply With Quote
Old 05-27-2018, 03:22 PM   #7
Registered Member
Regular
 
Join Date: Mar 2013
Location: Salinas
Region: California
Posts: 8,140
I would think that if the problem was caused by the fuel tank venting, that it would develop a vacuum easier with a full tank of fuel, and less air in the tank.
straybullitt is offline   Reply With Quote
Old 05-29-2018, 09:35 AM   #8
Registered Member
Regular
 
Aggiesrok's Avatar
 
Join Date: Jul 2011
Location: Bryan
Region: Texas
Posts: 1,890
Quote:
Originally Posted by straybullitt View Post
I would think that if the problem was caused by the fuel tank venting, that it would develop a vacuum easier with a full tank of fuel, and less air in the tank.

I agree, but it still makes no sense. I looked at the bottom of the tank and it is flat and not mashed up concave. The pickup tube is the only thing I can think of that I haven't looked at.
__________________
chevy runs deep, Don't step in chevy!

67 Coupe 289 - TCI C4 w/2k stall; Holley 4150 570cfm; Performer intake; mild cam; Pertronix HEI; 302 heads; Roller Tips; Hedman Tri-Y headers; H-pipe w/Flowmaster 40's; 9 in posi 3.50; 205/50-17F; 225/50-17R.
Aggiesrok is offline   Reply With Quote
Old 07-06-2018, 02:41 PM   #9
Registered Member
Regular
 
Tyoung68's Avatar
 
Join Date: Jun 2011
Location: concord
Region: California
Posts: 3,480
I've had problems with my gas gauge too. I remember seeing something from autometer saying for our mustangs we need a different gauge ohm range than what factor called but can't remember now ill try to google it. Also, another thought would be if the sender unit was not in the right position (with the float vertical) it could give you an off reading.
Tyoung68 is offline   Reply With Quote
Reply

Lower Navigation
Go Back   Mustang Evolution > 4 Cylinder | V6 | Classic Mustangs || Tech and Talk > Classic Mustangs

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not 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 Off
Pingbacks are On
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
2002 GT Fuel Tank Filler Neck/Tube Michael.s.king 1996-2004 Mustang GT 6 03-22-2016 10:43 AM
Gas Tank... NFloris_05 2005-2010 Mustang GT 13 01-13-2014 12:55 PM
Gas smell after full tank of gas 93mstnglx 2.3 Mustang 15 02-11-2013 09:37 PM
Gas tank jrmustang02 Pre-2005 V6 Mustang 2 11-03-2012 12:44 AM
Gas tank Junior65 Classic Mustangs 0 01-06-2012 10:11 AM

» Premium Vendor
» Like Us On Facebook



12:54 PM


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.

MustangEvolution.com is in no way associated with or endorsed by Ford Motor Company.