Fuel Gauge Problem - Ford Mustang Forums : Corral.net Mustang Forum
LinkBack Thread Tools Display Modes
post #1 of 2 Old 03-22-2012, 08:32 AM Thread Starter
Registered User
86montesbc's Avatar
Trader Feedback: (1)
Join Date: Sep 2010
Location: philadelphia
Posts: 53
Fuel Gauge Problem

I have a 90 5.o LX my fuel gauge only works around the red empty mark if there is two gallons or more it reads slightly above a empty between red and the first notch and when it is just about empty it goes below the red line.. i replaced the sender and found it to be the same problem my power at the sender is only 3.7 volts any ideas? has anyone else had this problem? any help is much appreciated

86montesbc is offline  
Sponsored Links
post #2 of 2 Old 03-23-2012, 08:56 PM
Registered User
87coupe50's Avatar
Trader Feedback: (25)
Join Date: May 2009
Location: Waynesboro, PA
Posts: 1,338
maybe this will help

Originally Posted by 87coupe50 View Post
my understanding is that if you disconnect the harness at the sending unit and the gauge reads full then your sending unit is the problem, if the gauge doesn't move then its your anti slosh module.

My gauge wouldnt move at all, TODAY I tried to replace the sending unit and it still didn't work (before I found out about this trouble-shooting method). I found a couple anti-slosh modules at the junk yard (where I also found out there was a difference between 87-89 and 90-93), replaced it with a matching module and my gauge now works. There is also a write-up about swapping the large resistor (100 micro farad 25v) with one from radio shack.

'87 Notch: Coyote swap 10.69 @127 w/ 1.47 60' SOLD
'89 Notch: Coyote Swap 10.03 w/1.33 60' Outlaw
'93 Notch: F150 Coyote swap SOLD
'82 Notch: F150 Coyote swap
87coupe50 is offline  
Sponsored Links


Quick Reply

Register Now

In order to be able to post messages on the Ford Mustang Forums : Corral.net Mustang Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

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


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

Similar Threads
Thread Thread Starter Forum Replies Last Post
CCRM/FPDM Problem - No Fuel After Cam Swap Tombstone02 GT & SOHC 3 11-24-2011 09:33 AM
Fuel Gauge on FPR Drops 5lbs when Vac Off ebx 5.0/5.8 Engine Tech 4 06-05-2011 02:13 PM
Intermittent Fuel problem help PurePony S-197 Mustang (2005-2010) 4 12-11-2010 05:08 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